Ohmite
Component
Selector
Catalog 4000K
Rev. March 2016
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2
Table of Contents
Current Sense
EBW Manganin/NiCr Current Sense 4
FCSL Metal Foil Current Sense 6
FC4L Four Terminal Current Sense Metal Foil 8
LVC Low Value Thick Film Chip 10
LVK Four Terminal High Precision Current Sense 12
MCS Metal Element Current Sense 15
RW1/RW2 Surface Mount Four Terminal Current Sense 17
60S Surface Mount Metal Plate Current Sense 19
High Voltage
HVC Precision High-Value High-voltage
Wraparound Chip 21
HVF High Voltage Film Flip Chip 23
Surface Mount
Macrochip High Voltage Thick Film 25
MC4 High Voltage 4-Resistor SMD DIP Package 27
MC1RD SMT-MOX Divider 29
Mini Macro Chip High Voltage Thick Film Chip 30
General
RC Carbon Composition (0.25 and 0.5 Watt) 32
RC Ceramic Composition (0.5 Watt and above) 32
RF Metal Film 32
RW Wirewound Power and Low Value 32
RP Power Film 32
RM High Voltage Thick Film 32
RW5/RW7 High Power SMD Wirewound 36
TDH 35 Watt TO220 Heat Sinkable Thick Film 38
2010 SMD 0.6 Watt Wirewound 40
Axial/Radial
Current Sense
CS3 Wire Element Four Terminal Current Sense 42
10 Two Terminal Axial Wire Element Current Sense 44
10 Four Terminal Axial Current Sense 45
14A Alumina Body Current Sense 46
60 Two Terminal Metal Element Current Sense 48
60 Four Terminal Bare Element 49
WL Miniature Wirewound Current Sense 50
Energy
A PulsEaters® Ceramic Composition Radial Terminals 52
EY Ceramic Composition 10% Tolerance 54
OX/OY Ceramic Composition Axial Terminal 56
TFS Surge Capable Non Inductive 58
TP High Energy Thick Film on Alumina 60
30 High Energy Axial Terminal 61
G Capacitor Discharge and Symmetry 64
High Voltage
Mini-Mox (0.25 Watt and 0.50 Watt) Axial Terminal 66
Mini-Mox Axial Terminal 68
Maxi-Mox Axial Terminal 70
RX-1M Axial Terminal 72
Slim-Mox Radial Terminal 73
Super-Mox High Voltage 78
Military
RW Military Grade 80 Series 86
General
20 Vitreous Enamel Conformal Axial Terminal 80
200 Brown Devil® Tubular Vitreous 82
40 Ohmicone® Silicone Ceramic Conformal
Axial Terminal 84
80 Acrasil® Silicone Ceramic Conformal Axial Terminal 86
90 Molded Vitreous Enamel Axial Terminal 88
Axiohm Centohm Coated Axial Terminal 90
OD/OF/OA Carbon Composition Molded 92
Little Rebel Carbon Film, 5% Tol., E24 values 94
TWW/TWM Ceramic Housed Radial Terminal 96
TUW/TUM Ceramic Housed Axial Terminal 98
WH/WN Miniature Molded Wirewound 100
TA Power Chip® Alumina Substrate Radial Terminal 102
Tubular
High Current
PFE/PFR Powr-Rib® Edgewound and Round Wire 104
14984 Round Edgewound 106
200 Brown Devil® Tubular Vitreous 82
210 Dividohm® Tubular Vitreous Adjustable 107
250 Stackohm® Oval Core Vitreous 109
270 Tubular Fixed Vitreous 112
280 Corrib® Tubular High Current, Fixed and
Adjustable Vitreous 114
Mounting Hardware 116
Terminals For Tubular Resistors 118
Cores For Tubular Resistors 120
Power-Mox Tubular 121
Power-Mox Dividers Tubular 122
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Table of Contents
Precision
Wirewound
HSP Hermetically Sealed Precision Axial Terminals 123
HPW High Precision Welded Axial and Radial 124
Heatsinkable
Wirewound
89 Metal-Mite® Aluminum Housed Heat Sinkable 126
BA Aluminum Cased 128
HS/HSN Aluminum Housed Axial terminal
Heat Sinkable 130
WFH Aluminum Housed Wirewound Power 132
Metalohm Cold Rolled Steel Encased Radial
Terminal Heat Sinkable 134
Thick Film
IS Ultra Low Profile Power 136
TAP600 600 Watt Heat Sinkable Planar 138
TAP800 800 Watt Heat Sinkable Planar 140
TAP1000/2000 1000 & 2000 Watt Heat
Sinkable Planar 142
TAH 20 Watt TO220 Package Heat Sinkable 144
TBH 25 Watt TO220 Package Heat Sinkable 146
TCH 35 Watt TO220 Package Heat Sinkable 148
TEH70 70 Watt TO247 Package Heat Sinkable 150
TEH100 Series 100 Watt Thick Film Power 152
TGH 120 and 200 Watt SOT227, Heat Sinkable 154
TGHG 100 Watt SOT227 Package Current Sense 156
TL Modular Heat Sinkable 158
Shunts
High Current
S High Current 160
SH Shunt Precision Metal-Clad Shunt 162
Heatsinks
TO Devices
B60/C60 Heat Sink System 164
C For TO-247, TO-220 and TO-264 Package 166
C40 For TO-247, TO-264 and SOT-227 168
D For SMT devices 170
E For TO-220 devices 172
F/R For TO-218, TO-220 and TO-247 174
M With two clips for TO-264 and TO-247 176
R2 For TO-220, TO-247, and TO-264 178
W For TO-220 and TO-247 devices 180
Extrusions
AH Series Extrusion Heatsinks 182
S Series LED Heatsinks 184
SV LED For Power LED Modules 186
B60/C60 Heat Sink System 164
Power Controls
Rheostats (Potentiometers) Wirewound 187
Potentiometers Molded Composition 190
Hardware For Rheostats and Tap Switches 192
Application Notes
Resistor Selection 194
Resistance Values Preferred Standard
Resistance Values 203
Ohm’s Law 203
Resistor Terminology 204
Abbreviations and Part Numbering Structure 205
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4
EBW Series
Manganin/NiCr Current Sense
PERFORMANCE DATA
Thermal Shock -65°C, 25°C, 125°C, 25°C 25cycles ±0.1%
Short Time Overload Rated Power X 5 for 5 secs. ±0.2%
Resistance to Soldering Heat 350°C 30 sec. or 250°C 10 min. ±0.2%
Moisture Resistance 90~98%RH,+25°C,+65°C,-10°C 10 cycles ±0.2%
High Temperature Exposure 140°C for 250 hours ±0.2%
Vibration High Frequency 15g 10 to 2000Hz 36 cycles ±0.2%
Inductance <3nH
Load Life 90 min “ON” 30 min “OFF” for 2000 hours ±1.0%
The EBW Series are manufactured using electron
beam welding technology. This allows the joining of
different alloys with great accuracy and tolerance.
The EBW Series have heavy copper connectors,
excellent long term stability and low inductance.
These components can tolerate soldering tempera-
tures of 350C for 30 seconds or 250C for 10min.
These can be mounted using re-flow soldering or
welding on copper. The EBWA can handle a power
of 5W up to 100A at 0.5mΩ. The EBWB can handle
a constant power of 7W at 0.2mΩ and a continuous
load of 180A at 0.2mΩ.
CHARACTERISTICS
Tolerance ±1(F), ±2(G), ±5(J)
TCR 20°C-150°C
Max. ±100ppm/°C (EBWA)
Max. ±120ppm/°C (EBWB)
Operating
Temperature
-55°C to 170°C
APPLICATIONS
•Currentsensorsforhybridpowersources
•Frequencyconverters
•Highcurrentautomotiveapplications.
SERIES SPECIFICATIONS
Model Power (W) Resistance (mΩ) Material TCR (20°C - 150°C) Weight (g)
EBWA-M 5 0.5 Manganin ±75ppm/°C 0.4081
4 1 Manganin ±60ppm/°C 0.1994
EBWA-N 4 2 NiCr Alloy ±100ppm/°C 0.2726
3 3 NiCr Alloy ±100ppm/°C 0.1832
2.5 4 NiCr Alloy ±100ppm/°C 0.1363
EBWB-M 7 0.2 Manganin ±100ppm/°C 1.5138
6 0.5 Manganin ±100ppm/°C 0.5652
EBWB-N 6 1 NiCr Alloy ±120ppm/°C 0.8573
4 2 NiCr Alloy ±120ppm/°C 0.4287
3.5 3 NiCr Alloy ±120ppm/°C 0.2858
Derating
% Rated Power
Resistor Surface Temp., oC
180
170°
(EBWB) 65°
85° (EBWA)
0 6030 90 120 150
40
0
60
80
20
100
CERTIFICATIONS
BN ES ISO 9001: 2008
ISO/TS 16949: 2009
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Land Pattern
EBW Series
Manganin/NiCr Current Sense
ORDERING INFORMATION
Standard Part Numbers
EBWA-MR0005FE
EBWA-MR0010FE
EBWA-NR0020FE
EBWA-NR0030FE
EBWA-NR0040FE
EBWB-MR0002FE
EBWB-MR0005FE
EBWB-NR0010FE
EBWB-NR0020FE
EBWB-NR0030FE
DIMENSIONS
(in. / mm)
PULSE ENERGY/POWER FOR CONTINUOUS OPERATION
Ohm Value L W Thickness "t"
EBWA-M 0.5mΩ 0.413 / 10.5 0.197 / 5 0.035 / 0.88
1mΩ 0.017 / 0.43
EBWA-N 2mΩ 0.413 / 10.5 0.197 / 5 0.025 / 0.64
3mΩ 0.017 / 0.43
4mΩ 0.013 / 0.32
EBWB-M 0.2mΩ 0.598 / 15.2 0.295 / 7.5 0.059 / 1.5
0.5mΩ 0.022 / 0.56
EBWB-N 1mΩ 0.598 / 15.2 0.295 / 7.5 0.035 / 0.9
2mΩ 0.018 / 0.45
3mΩ 0.012 / 0.3
0.220"
5.6mm
0.630"
16mm
0.344" / 8.75mm
(0.244" / 6.2mm)
L
+.008/-0"
+.2/-0mm
0.197" ±.008
5mm ±0.2
W
±.012"
±.3mm
max. 1.2mm
trimming area
electron
beam
welding
t
0.020"
0.5mm
Pulse Energy (J)
Power (W)
Time (msec.)
EBWB
EBWA
1
0.01
10
100
0.1
1000
10,000
0.01
0.0001
0.1
1
0.001
10
100
1,00010,000
0.010.0001 0.1 10.001 10 100
EBWA: Max. curve is only valid for the resistance value 0.5m. The
min. curve is only valid for the resistance value 4m. For other resis-
tance values the area in between the max. and the min. curve is valid
EBWB: Max. curve is only valid for the resistance value 0.2m. The
min. curve is only valid for the resistance value 2m. For other resis-
tance values the area in between the max. and the min. curve is valid
EBWA-MR0020FET
Series
Electron
Beam Weld
Size Alloy
M = Maganin
N = NiCr
Resistance Tolerance
F = 1%
G = 2%
J = 5%
Tape and reel
EBWA: 3000 pc/reel
EBWB: 2000 pc/reel
RoHS Compliant
Reel: ~12.95" (329mm)
Qty. per reel: EBWA: 3000pcs
EBWB: 2000pcs
15.70mm ±.10
11.00mm ±.10
0.30mm ±.10
2.00mm ±.10
2.00mm ±.10 1.75mm ±.10
1.75mm ±.10
11.50mm ±.10
7.50mm ±.10
12.00mm ±.10
24.00mm ±.30
16.00mm ±.30
10 pitch cumulative
tolerance on tape ±0.2
4.00mm ±.10
10 pitch cumulative
tolerance on tape ±0.2
4.00mm ±.10 Ø1.50mm +10/-0
Ø1.50mm +10/-0
8.00mm ±.10
8.00mm ±.10
EBWA EBWB
5.50mm ±.10
2.10mm ±.10
2.10mm ±.10
Tape and Reel
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6
Test Condition Maximum ∆R
Overload (10W) Rated power x1.5, 5s ±(1.0%+0.0005Ω)
Max. temperature
for rated power
70°C
(10W: 100°C)
Operating
temp. range
-55°C ~ +155°C
Rated voltage √(Rated power x Resistance
value) V
In-rush current* Rated current 10 msec ON,
60 sec OFF, 10 cycles* (see
table below)
±(1.0% +0.0005Ω)
Rapid change of
temperature
-55°C (30min.)/+155°C
(30min.), 100 cy.
-40℃ (30min), Room temp
(3min), +125℃ (30min),
Room temp (3min), 1000 cy.,
FCSL150 only
±(1.0% +0.0005Ω)
±0.6%
Solderability 245°C ±5°C for 3 ±0.5 sec. Min. 90% cover-
age
Endurance at
70°C
70°C ±3°C, Rated voltage
1.5h ON, 0.5h OFF, 1000h
±(1.0% +0.0005Ω)
Resistance to
soldering heat
260°C ±5°C for 10 ±1 sec. ±(0.5% +0.0005Ω)
Moisture
resistance
60°C ±2°C, 90~95% RH,
Rated voltage 1.5h ON, 0.5h
OFF, 1000h
±(2.0% +0.0005Ω)
Terminal strength 10W: Bending width: 2mm
for 10s±1s, Glass epoxy sub-
strate 1.6mm thick
±(1.0%+0.0005Ω)
FCSL Series
Metal Foil Current Sense
Ohmite continues to add to its complement
ofCurrentSenseofferingswiththeFCSL
Series.FCSLincorporatesprovenmetalfoil
technology to produce the ultimate in a cur-
rentsenseresistor.FCSLfeaturestheeffec-
tive combination of very low and stable TCRs
(Temperature Coefficient of Resistance) avail-
able in a wide selection of very low ohmic
values. Power ratings up to 10 Watts makes
FCSLtheidealchoiceforyourcurrentsens-
ing applications.
Power Resistance TCR Weight
Series Rating Range (mΩ) Tol. (ppm/°C) (g)
FCSL64 2.0W 1m ±5% ±150 0.036
2m ±2% ±100
3m ~ 100m ±1% ±50
10m ~ 50mΩ ±0.5% ±50
FCSL76 3.0W 1m ±5% ±150 0.050
2m ±2% ±100
3m ~ 100m ±1% ±50
FCSL90 4.0W 1m ±5% ±150 0.071
2m ±2% ±100
3m ~ 100m ±1% ±50
FCSL110 5.0W 1m ±5% ±150 0.096
2m ±2% ±100
3m ~ 100m ±1% ±50
10m ~ 50mΩ ±0.5% ±50
FCSL150 10.0W 1m ±5% ±100 0.316
2m ±2% ±100
3m ~ 100m ±1% ±100
(>9m:±50)
FEATURES
•FoilConstructionensuresaverystableTCR(Temperature
Coefficient of Resistance)
•Designedforautomaticinsertion
•Industrystandardsizes
•Highheatresistantuse
•Lowheatelectromotiveuse
•Color:white(top)andgreen(bottom)
100
Percent Rated Power
Ambient
(10W)
Temperature, °C
60
20
0
80
40
050 100 15570-55
In-rushcurrent=√(in-rush
power/resistance value), or
max. current, whichever is
smaller
*In-rush Current
1mΩ~10mΩ 12mΩ~100mΩ
Rated In-rush Max. In-rush Max.
Series Wattage Power Current Power Current
FCSL64 2W 225W 125A 150W 70A
FCSL76 3W 325W 150A 210W 80A
FCSL90 4W 440W 180A 300W 100A
FCSL110 5W 600W 240A 440W 120A
FCSL150 10W 700W 270A 470W 140A
Derating
Recommended Reflow
Temperature Profile
Forleadfreesoldering(Sn-Ag-Cu
solder)
Preheating: 130°~180° 60s~90s
Heating: Over220° 30s~90s
Peak: 240°~260° Max.10s
Max.numberofreflow:2
SERIES SPECIFICATIONS CHARACTERISTICS
Temperature °C
Time (sec.)
Preheating
130 ~ 180℃
60 ~ 90 sec.
Heating
Peak
200
50
300
250
100
150
Over 220℃
30s ~ 90s
240 ~ 260℃ Max. 10s
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PACKAGING SPECIFICATIONS
Reel (in./mm)
Standard Part Numbers
Tape (in./mm)
FCSL76 FCSL90 FCSL110 FCSL150
A 0.163 (4.15 ±0.10) 0.191 (4.85 ±0.10) 0.213 (5.40 ±0.10) 0.327 (8.30 ±0.1)
B 0.313 (7.95 ±0.10) 0.368 (9.35 ±0.10) 0.453 (11.50 ±0.10) 0.614 (15.60 ±0.1)
W 0.630 (16.00 ±0.30) 0.630 (16.00 ±0.30) 0.945 (24.00 ±0.30) 0.945 (24.00 ±0.2)
F 0.295 (7.50 ±0.10) 0.295 (7.50 ±0.10) 0.453 (11.50 ±0.10) 0.069 (1.75 ±0.1)
E 0.069 (1.75 ±0.10) 0.069 (1.7 ±0.10) 0.069 (1.75 ±0.10) 0.453 (11.50 ±0.1)
P0 0.157 (4.00 ±0.10) 0.157 (4.00 ±0.10) 0.157 (4.00 ±0.10) 0.157 (4.00 ±0.1)
P1 0.315 (8.00 ±0.10) 0.315 (8.00 ±0.10) 0.315 (8.00 ±0.10) 0.472 (12.00 ±0.1)
P2 0.079 (2.00 ±0.10) 0.079 (2.00 ±0.10) 0.079 (2.00 ±0.10) 0.079 (2.00 ±0.1)
D0 0.059 (1.50 ±0.10) 0.059 (1.50 ±0.10) 0.059 (1.50 ±0.10) 0.059 (1.50 +0.05/-0)
D1 0.059 (1.50 ±0.10) 0.059 (1.50 ±0.10) 0.059 (1.50 ±0.10) 0.059 (1.50 +0.05/-0)
T 0.012 (0.30 ±0.05) 0.012 (0.30 ±0.05) 0.012 (0.30 ±0.05) 0.012 (0.30 ±0.05)
T2 0.047 (1.2 ±0.15) 0.047 (1.2 ±0.15) 0.047 (1.2 ±0.15) 0.091 (2.3 ±0.1)
FCSL64 FCSL76/90 FCSL110 FCSL150
A 7.087 (180 +0/-3) 7.087 (180 +0/-3) 7.087 (180 ±2.0) 12.992 (330±2.0)
H 0.512 (13 ±0.2) 0.512 (13 ±0.2) 0.512 (13 ±0.2) 0.512 (13±0.2)
E 0.079 (2.0 ±0.5) 0.079 (2.0 ±0.5) 0.079 (2.0 ±0.5) 0.079 (2.0 ±0.5)
N 0.236 (60 +1/-0) 0.236 (60 +1/-0) 0.827 (21 ±0.8) 3.937 (100±1.0)
W1 0.518 (13.0 ±0.3) 0.669 (17.0 ±0.3) 1.000 (25.4 ±1.0) 1.000 (25.4 ±1.0)
W2 0.669 (17.0 ±1.4) 0.764 (19.4 ±1.0) 1.157 (29.4 ±1.0) 1.157 (29.4 ±1.0)
FCSL Series
Metal Foil Current Sense
Ohms 2 Watts 3 Watts 4 Watts 5 Watts 10 Watt
0.0010 FCSL64R001JE FCSL76R001JE FCSL90R001JE FCSL110R001JE FCSL150R001JE
0.0020 FCSL64R002GE FCSL76R002GE FCSL90R002GE FCSL110R002GE FCSL150R002GE
0.0050 FCSL64R005FE FCSL76R005FE FCSL90R005FE FCSL110R005FE FCSL150R005FE
0.0100 FCSL64R010FE FCSL76R010FE FCSL90R010FE FCSL110R010FE FCSL150R010FE
0.0250 FCSL64R025FE FCSL76R025FE FCSL90R025FE FCSL110R025FE FCSL150R025FE
0.0500 FCSL64R050FE FCSL76R050FE FCSL90R050FE FCSL110R050FE FCSL150R050FE
0.0150 FCSL64R015FE FCSL76R015FE FCSL90R015FE FCSL110R015FE FCSL150R015FE
0.0200 FCSL64R020FE FCSL76R020FE FCSL90R020FE FCSL110R020FE FCSL150R020FE
0.0300 FCSL64R030FE FCSL76R030FE FCSL90R030FE FCSL110R030FE FCSL150R030FE
0.1000 FCSL64R100FE FCSL76R100FE FCSL90R100FE FCSL110R100FE FCSL150R100FE
R010
1
3
W
Lt
1. Alumina substrate
2. Resistive element
(Ni-Cu-Mn alloy)
3. Electrode (Ni, Sn)
4. Protective coating
(Epoxy resin)
5. Marking
(Epoxy resin)
2
4
5
FCSL110
has wrap-around terminals
0.5mm +0.2/-0.05
Land Pattern
a
b
c
(mm) Value range a b c
FCSL64 1mΩ 0.9 4.2 6.6
2mΩ~100mΩ 2.2 4.2 6.6
FCSL76 1mΩ 1.1 4.6 7.8
2mΩ~100mΩ 2.6 4.6 7.8
FCSL90 1mΩ 1.3 5.1 9.2
2mΩ~100mΩ 3.1 5.1 9.2
FCSL110 1mΩ 1.5 5.6 11.2
2mΩ~100mΩ 3.6 5.6 11.2
FCSL150 1mΩ 2.0 8.4 15.2
2mΩ~100mΩ 5.0 8.4 15.2
Series Power Rating L W t
FCSL64 2.0W 0.122/3.1 0.248/6.3 0.047/1.2
0.020/0.5
0.020/0.5
FCSL76 3.0W 0.15/3.8 0.3/7.6 0.053/1.35
0.024/0.6
0.024/0.6
FCSL90 4.0W 0.177/4.5 0.35/8.9 0.063/1.6
0.028/0.7
0.028/0.7
FCSL110 5.0W 0.197/5.0 0.43/11.0 0.071/1.8
0.031/0.8
0.031/0.8
FCSL150 10W 0.295/7.5 0.591/15.0 0.043/1.1
Series Tolerance
J=5%
G= 2%
F=1%
D = 0.5%
Ohms
R005 = 0.005
R050 = 0.050
Taping Code
1,000 pc/reel
(10W: 500pc/reel)
RoHS Compliant
Package Size
64=6432=2W
76=7638=3W
90=9045=4W
110=11050=5W
150=15075=10W
DIMENSIONS
(in.±.008/mm ±0.20)
ORDERING INFORMATION
A
B
P0
P2
D0
E
F
W
D1
P1
T
T2
Direction
of feed
FCSL64
A 0.135 (3.43 ±0.2)
B 0.261 (6.63 ±0.2)
W 0.472 (12.0 ±0.3)
E 0.069 (1.75 ±0.1)
F 0.217 (5.5 ±0.05)
P0 0.157 (4.0 ±0.1)
P1 0.157 (4.0 ±0.1)
P2 0.079 (2.0 ±0.05)
D0 0.059 (1.5 +0.1/-0)
D1 0.059 (1.5 +0.2/-0)
T 0.008 (0.2 ±0.05)
T2 0.059 (1.5 max.)
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8
FC4L Series
FC4L Four Terminal Current Sense
Metal Foil Construction
OhmiteextendsitsFC4LSerieswiththis4-terminalKelvin
typeFC4Lderivativein2wattand5wattpackagesizes.
Employing the same Ni-Cu-Mn resistive element this prod-
uct affords the user an added advantage of a built in 4-ter-
minal design with 2 larger electrodes for current manage-
ment and 2 smaller electrodes for current measurement.
Power Resistance TCR Weight
Series Rating Range Tol. (ppm/°C) (g)
FC4L16 0.25W 5m, 10m, 20m, ±1% ±50 0.004
50mΩ ~ 100mΩ
FC4L32 1W 1mΩ ±5% ±100 0.015
2mΩ ±2% ±100
3mΩ ±1% ±100
4mΩ ~ 500mΩ ±1% ±50
FEATURES
•FoilConstructionensuresaverystableTCR
(Temperature Coefficient of Resistance)
•Designedforautomaticinsertion
•Industrystandardsizes
•Highheatresistantuse
•Lowheatelectromotiveuse
•Color:white(top)andgreen(bottom)
100
Percent Rated Power
Ambient
FC4L16
Others
Temperature, °C
60
20
0
80
40
050 100 125 15570-55
SERIES SPECIFICATIONS
CHARACTERISTICS
Test Condition Maximum ∆R
Max. temperature for rated power 70°C
Operating temperature range -55°C ~ +155°C (FC4L16: -40°C ~ +125°C)
Rated voltage √(Rated power x Resistance value) V
Overload (FC4L16 only) Rated power x 1.5 for 5s ±(0.5%+0.0005Ω)
In-rush current Rated current 10 msec ON, 60 sec OFF, 10
cycles.
Power Resistance In-rush Max.
Series Rating Range Power Current
FC4L16 0.25 watt 5m, 10mΩ 2.5W 5A
FC4L32 1 watt 1mΩ~9mΩ 25W 45A
10mΩ~500mΩ 12.5W 24A
FC4L64 2 watt 1mΩ~9mΩ 100W 85A
10mΩ~100mΩ 50W 35A
FC4L110 5 watt 1mΩ~50mΩ 100W 100A
In-rush current = √(in-rush power/resistance
value), or max. current, whichever is smaller
±(1.0% +0.0005Ω)
Rapid change of temperature -55°C (30min.)/+155°C (30min.), 100 cycles
1000 cycles, FC4L16 only
±(1.0% +0.0005Ω)
±(2.0%+0.0005Ω)
Solderability 245°C ±5°C for 3 ±0.5 sec. Min. 90% coverage
Endurance at 70°C 70°C ±3°C, Rated voltage 1.5h ON, 0.5h
OFF, 1000h
±(1.0% +0.0005Ω)
Resistance to soldering heat 260°C ±5°C for 10 ±1 sec. ±(1.0% +0.0005Ω)
(±0.5% FC4L16)
Moisture resistance 60°C ±2°C, 90~95% RH, Rated voltage 1.5h
ON, 0.5h OFF, 1000h
±(2.0% +0.0005Ω)
(±1.0% FC4L16)
Derating
Power Resistance TCR Weight
Series Rating Range Tol. (ppm/°C) (g)
FC4L64 2W 1mΩ ±5% ±100 0.038
2mΩ ±2% ±100
3mΩ ±1% ±100
4m ~ 100mΩ ±1% ±50
10m ~ 50mΩ ±0.5% ±50
FC4L110 5W 1mΩ ±5% ±100 0.110
2mΩ ±2% ±50
3mΩ ~ 100mΩ ±1% ±50
10m ~ 50mΩ ±0.5% ±50
Recommended Reflow
Temperature Profile
Forleadfreesoldering(Sn-Ag-Cu
solder)
Preheating: 130°~180° 60s~90s
Heating: Over220° 30s~90s
Peak: 240°~260° Max.10s
Max.numberofreflow:2
Temperature °C
Time (sec.)
Preheating
130 ~ 180℃
60 ~ 90 sec.
Heating
Peak
200
50
300
250
100
150 Over 220℃
30s ~ 90s
240 ~ 260℃ Max. 10s
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A
B
P0
P2
D0
E
FW
D1P1
T
T2
Direction
of feed
A
B
P0
P2
D0
E
FW
D1P1
T
T2
Direction
of feed
PACKAGING SPECIFICATIONS
ReelTape
inches (mm)
FC4L16 FC4L32 FC4L64 FC4L110
A 0.037 (0.95±0.05) 0.075 (1.90 ±0.1) 0.135 (3.43 ±0.2) 0.213 (5.40 ±0.10)
B 0.073 (1.85±0.05) 0.138 (3.50 ±0.1) 0.261 (6.63 ±0.2) 0.453 (11.50 ±0.10)
W 0.315 (8.00±0.10) 0.315 (8.00 ±0.2) 0.472 (12.0 ±0.3) 0.945 (24.00 ±0.30)
F 0.138 (3.50±0.05) 0.138 (3.50 ±0.05) 0.069 (1.75 ±0.1) 0.069 (1.75 ±0.10)
E 0.069 (1.75±0.10) 0.069 (1.75 ±0.1) 0.217 (5.5 ±0.05) 0.453 (11.50 ±0.10)
P0 0.157 (4.00±0.10) 0.157 (4.0 ±0.1) 0.157 (4.0 ±0.1) 0.157 (4.00 ±0.10)
P1 0.157 (4.00±0.10) 0.157 (4.0 ±0.1) 0.157 (4.0 ±0.1) 0.315 (8.00 ±0.10)
P2 0.079 (2.00±0.05) 0.079 (2.0 ±0.05) 0.079 (2.0 ±0.05) 0.079 (2.00 ±0.10)
D0 0.059 (1.50+0.10/-0) 0.059 (1.50 +0.1/-0) 0.059 (1.5 +0.1/-0) 0.059 (1.50 ±0.10)
D1 0.024 (0.60±0.05) 0.039 (1.00 +0.2/-0) 0.059 (1.5 +0.2/-0) 0.059 (1.50 ±0.10)
T 0.008 (0.20±0.05) 0.008 (0.20 ±0.05) 0.008 (0.20 ±0.05) 0.012 (0.30 ±0.05)
T2 0.022 (0.55±0.05) 0.039 (1.00 ±0.2) 0.059 (1.5) max. 0.047 (1.2 ±0.15)
FC4L16 FC4L32 & 64 FC4L110
A 7.087 (180 +0/-3) 7.087 (180 +0/-3) 7.087 (180 ±2.0)
H 0.512 (13 ±0.2) 0.512 (13 ±0.2) 0.512 (13 ±0.2)
E 0.079 (2.0 ±0.5) 0.079 (2.0 ±0.5) 0.079 (2.0 ±0.5)
N 2.362 (60 +1/-0) 2.362 (60 +1/-0) 0.827 (21 ±0.8)
W1 0.354 (9.0 ±0.3) 0.512 (13.0 ±0.3) 1.000 (25.4 ±1.0)
W2 0.512 (13.0 ±0.3) 0.669 (17.0 ±1.4) 1.157 (29.4 ±1.0)
FC4L110R005FER
Series Tolerance
J=5%
G=2%
F=1%
D = 0.5%
Ohms
R005=0.005Ω
R050=0.050Ω
Taping Code
1,000 pc/reel
FC4L16: 5,000 pc/reel
RoHS Compliant
Package Size
110=11050=5W
64=6432=2W
32=3216=1W
16=1608=0.25W
TCR* (ppm)
W = 25
V = 50
L = per chart
above
*FC4L32 and FC4L64 values over 0.100Ω only
Standard Part Numbers for FC4L series
0.25 watt 1 watt 2 watt 5 watt
FC4L32R001JER FC4L64R001JER FC4L110R001JER
FC4L32R002GER FC4L64R002GER FC4L110R002GER
FC4L32R003FER FC4L64R003FER FC4L110R003FER
FC4L16R005FER FC4L32R005FER FC4L64R005FER FC4L110R005FER
FC4L64R010DER FC4L110R010DER
FC4L16R010FER FC4L32R010FER FC4L64R010FER FC4L110R010FER
FC4L64R015DER FC4L110R015DER
FC4L16R015FER FC4L32R015FER FC4L64R015FER FC4L110R015FER
FC4L64R020DER FC4L110R020DER
FC4L16R020FER FC4L32R020FER FC4L64R020FER FC4L110R020FER
FC4L64R025DER FC4L110R025DER
FC4L16R025FER FC4L32R025FER FC4L64R025FER FC4L110R025FER
FC4L64R030DER FC4L110R030DER
FC4L16R030FER FC4L32R030FER FC4L64R030FER FC4L110R030FER
FC4L64R050DER FC4L110R050DER
FC4L16R050FER FC4L32R050FER FC4L64R050FER FC4L110R050FER
FC4L16R100FER FC4L32R100FER FC4L64R100FER FC4L110R100FER
R010
3
4
1
W
L
t
2
5
1. Alumina substrate
2. Resistive element
(Ni-Cu-Mn alloy)
3. Electrode (Ni, Sn)
4. Protective coating
(Epoxy resin)
5. Marking (Epoxy
resin): wider mark
indicates “V” term.
0.5mm +0.2/-0.05
d
c
b
“V” term. “I” term.
a
b
e
c
d
(mm) a b c d e
FC4L16 0.25 1.2 0.40 0.30 1.2
FC4L32 0.4 2.7 0.35 0.3 2.7
FC4L64 2.0 4.4 0.7 0.5 5.4
FC4L110 3.2 5.6 1.6 1.1 8.7
L W t b c d
Rating (in.±.008/mm ±0.20) (in./mm) mm ±0.15 mm ±0.1 mm ±0.15
FC4L16 0.25 watt 0.063 / 1.60 0.031 / 0.8 0.010 / 0.26 0.30 ±.2 0.3 ±.2 1.0 ±.2
FC4L32 1 watt 0.126 / 3.20 0.063 / 1.6 0.014 / 0.35 0.35 0.2 2.6
FC4L64 2 watt 0.251 / 6.40 0.126 / 3.2 0.020 / 0.5 0.7 0.5 5.2
FC4L110 5 watt 0.433 / 11.0 0.197 / 5.0 0.028 / 0.7 1.4 1.1 8.5
FC4L Series
FC4L Four Terminal Current Sense
Metal Foil Construction
DIMENSIONS
Land Pattern
ORDERING INFORMATION
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10
LVC Series
Low Value Chip
PERFORMANCE DATA
Moisture
resistance
60℃±2℃, 90%~95% RH,
Rated voltage 1.5h ON,
0.5h OFF, 1000h
±(0.5%+0.0005Ω)
Temperature
Cycle
-40℃ (30min.)/+125℃
(30min.), 5 cycles
±(0.5%+0.0005Ω)
Short Time
Overload
Rated voltage x 2.5 for 5s ±(0.5%+0.0005Ω)
Endurance 70℃±3℃, Rated voltage
1.5h ON, 0.5h OFF, 1000h
±(0.5%+0.0005Ω)
Resistance to
Solder Heat
260℃±5℃ for 10±1s ±(0.5%+0.0005Ω)
Terminal
strength
Bending width: 2mm for
10s±1s, Glass epoxy
substrate with thickness of
1.6mm
±(0.5%+0.0005Ω)
Solderability 245℃±5℃ for 3s±0.5s Min. 90% coverage
Max.
Overload
Current
(A) Time applied: max.
10msec Interval: min. 60sec
LVC06 I=√(32/R)
LVC20 I=√(50/R)
LVC25 I=√(64/R)
Substrate Alumina 96%
Resistor Thick Film, Ni-Cr Alloy
Electrode Sn, Ni, Cu
Coating Epoxy resin
Max. Working Volts V = √PR (P = Rated Watts, R = Resistance
Value)
Derating 100% @ 70°C, Derates Linearly to Zero @
125°C
Operating temp.
range
-40℃ ~ +125℃
Soldering The recommended soldering condition for
both reflow and wave soldering is as follows:
Preheating: 150° ~ 180°C 60 ~ 120 sec.
Soldering: min. 230°C 30 ~ 40 sec.
Max. temp.: max. 260°C max. 10 sec.
Power Max. Resistance TCR
Series Rating Current Range* ppm/°C
LVC06 0.5W 32A 10m-15m 500
18m-27m 350
33m-47m 200
50m- 4.7 100
LVC20 0.75W 40A 10m-15m 500
18m-27m 350
33m-47m 200
50m- 4.7 100
LVC25 1.0W 45A 10m-15m 500
18m-27m 350
33m-47m 200
50m- 4.7 100
* E-12 values and 20, 25, 50
Resistance Tolerance
10mΩ ~ 22mΩ 2%
27mΩ ~ 4.7Ω 1%
Ohmite’sLVCSerieslowvaluechip
resistors are ideal for today’s current
senseapplicationsrequiringlowprofile,
low cost solutions. Available in 0.5,
0.75,and1wattsizes,footprintsare
1206,2010,and2512sizerespectively.
These resistors are offered in ohmic
ranges from 0.10 to 4.7 ohms in stan-
dard 1% and 2% in E12 values depend-
ing on value.
TheLVCSeriesresistorsarewell
suited for a variety of industrial and
commercial applications.
FEATURES
•IndustryStandardSizes
•TerminalBarrierResistsAg
Migration
•WorkingTemperatureRange
isfrom-40°Cto+125°C
•DesignedforAutomatic
Insertion
APPLICATIONS
•SwitchingPowerSupplies
•Cellular
•TelecomandWireless
•Computer
•RF
SERIES SPECIFICATIONS
CHARACTERISTICS
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Size L W t a
±0.2 ±0.2 ±0.15 ±0.15
LVC06 3.2 1.6 0.5 1.0
(EIA size 1206)
LVC20 5.0 2.5 0.5 1.7
(EIA size 2010)
LVC25 6.4 3.2 0.5 2.0
(EIA size 2512)
Low Value
Chip Series
Case Size
06 = 1206
20 = 2010
25 = 2512
Tolerance
F=1%
G = 2%
Ohms
R249 = 0.249
1R00 = 1.0
Taping Code
blank = bulk package
V = reel taped
RoHS Compliant
LVC06FR560EV
Land Pattern
Land pattern dimensions are for reference only
L
O
M
N
Size M N O L
LVC06 0.146 0.040 0.080 0.066
LVC20 0.229 0.056 0.120 0.117
LVC25 0.288 0.068 0.150 0.152
180 ±360 ±1
13 ±.2
2 ±.5 13 ±1.4 (LVC06)
15 ±1.4 (LVC20, 25)
9 ±.3 (LVC06)
13 ±.3 (LVC20, 25)
L
W
aa
t
Resistor
Protective
coating
Substrate Electrode
Ag-Pd terminal
Nickel barrier
100% Sn solder
Ohm range Tol. Available Ohm Values
0.027 ~ 4.7 1% 0.027, 0.033, 0.039, 0.047, 0.050, 0.056, 0.068, 0.082,
0.10, 0.12, 0.15, 0.18, 0.20, 0.22, 0.25, 0.27, 0.33, 0.39,
0.47, 0.50, 0.56, 0.68, 0.82, 1.0, 1.2, 1.5, 1.8, 2.0, 2.2, 2.5,
2.7, 3.3, 3.9, 4.7
0.010 ~ 0.022 2% 0.010, 0.012, 0.015, 0.018, 0.020, 0.022
Only E12 values plus 20, 25, 50
LVC Series
Low Value Chip
DIMENSIONS
(mm)
REEL SPECIFICATIONS
5,000 pc/reel
ORDERING INFORMATION
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12
LVK Series
Four Terminal High Precision Current Sense
Current sense resistors enable the measurement of current flow
in a circuit by monitoring a voltage drop across a precisely cali-
bratedresistance.TheLVKchipfeaturesfourterminals,also
knownasa“Kelvin”configuration.Thisconfigurationenables
current to be applied through two opposite terminals and a
sensing voltage to be measured across the other two terminals,
eliminating the resistance and temperature coefficient of the
terminals for a more accurate current measurement.
Isolatingthevoltageandcurrentterminals(seeschematic)
facilitates a very accurate current measurement. Ohmite’s pro-
prietary technology offers an excellent Temperature Coefficient
of Resistance (TCR) even for very low resistance values. The
resistive element consists of a durable, anti-corrosive metal
alloy that combines reliable performance with the ability to
withstand harsh environments.
Power Resistance Max. Over Current
Pkg. Rating Range TCR Available Max. Max.
Series Size (W @70°C) (Ω) (ppm/°C) Tolerance Values Power Current
LVK12 1206 0.5W 0.01-0.100 50ppm 0.5%, 1% E12 20W 20A
LVK20 2010 0.75W 0.01-0.05 50ppm 0.5%, 1% E12 29W 23A
LVK24 2412 1.0W 0.01-0.100 50ppm 0.5%, 1% E12 38W 27A
0.001 300ppm
LVK25 1224 2.0W 0.002-0.004 200ppm 1% 1, 2, 3, 5, 9,10mΩ 150W 200A
0.005-0.01 100ppm
V = sensing terminal
(voltage)
I = current terminal
VV
II
Res. Range 0.001Ω - 0.010Ω
Operating Temp. Range -40°C to +125°C
Rated Ambient Temperature +70°C
Resistance Tolerance 0.5% and 1% standard
Temperature Coefficient LVK12, LVK20, LVK24: 50ppm standard
LVK25: 100ppm, 200ppm, or 300ppm based on
resistance value
Coating Material epoxy resin
Terminals 100% matte tin
Max. Over Current Time applied: 10ms max.
Interval: 60sec min.
Max. over current = √(Max. power÷ Resistance
value) or max. current, whichever is smaller.
FEATURES
•Designedforautomatic
insertion
•Industrystandardsizes
•High-precisionKelvin
connect capability in a
small package
SERIES SPECIFICATIONS
CHARACTERISTICS
Schematic
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PERFORMANCE CHARACTERISTICS
Test Items Performance Requirements Test Methods / standard: JIS C 5201.1
Overload ±(0.5%+0.0005Ω)Rated voltage x 1.5 for 5s
Endurance at 70°C ±(0.5%+0.0005Ω)70°C±3°C, Rated voltage 1.5h ON, 0.5h OFF, 1000h
Moisture
resistance
±(0.5%+0.0005Ω) 60°C±2°C, 90%~95% RH, Rated voltage 1.5h ON,
0.5h OFF, 1000h
Rapid change of
temperature
±(0.5%+0.0005Ω)-40°C (30min.)/+125°C (30min.), 5 cycles
Resistance to sol-
dering heat
±(0.5%+0.0005Ω)260°C±5°C for 10s±1s
Substrate bending ±(0.5%+0.0005Ω)Bending width: 2mm for 10s±1s, Glass epoxy sub-
strate with thickness of 1.6mm
Solderability 95% or more of the electrode surface
shall be covered with new solder
245°C±5°C for 3s±0.5s
LVK Series
Four Terminal High Precision Current Sense
Temperature °C
Time (sec.)
Preheating
130 ~ 180℃
60 ~ 90 sec.
Heating
Peak
200
50
300
250
100
150 Over 220℃
30s ~ 90s
240 ~ 260℃ Max. 10s
Reflow Temperature Profile
Forleadfreesoldering(Sn-Ag-Cusolder)
Preheating:130°~180° 60s~90s
Heating: Over220° 30s~90s
Peak: 240°~260° Max.10s
Ramp-uprate: max3°C/sec.
Timeaboveliquidous: 60–150sec.
Ramp-downrate: max6°C/sec.
Max.numberofreflow:2
DIMENSIONS
(mm)
Size L W t a b
LVK12 (1206) 3.2 ±0.2 1.6 ±0.2 0.5 ±0.15 1.0 ±0.2 0.55 ±0.2
LVK20 (2010) 5.0 ±0.2 2.5 ±0.2 0.5 ±0.15 1.7 ±0.2 0.9 ±0.2
LVK24 (2412) 6.4 ±0.2 3.2 ±0.2 0.5 ±0.15 2.1 ±0.2 1.2 ±0.2
LVK25 (1224) 3.2 ±0.2 6.4 ±0.2 0.5 ±0.2 0.4 ±0.2 2.7 ±0.2
L
W
b
a
t
1
2
3
4
W
L
a
LVK 12, LVK20, LVK24
(0.5, 0.75 & 1 watt)
LVK25
(2 watt)
1. Electrode
2. Protection
coat
3. Almina
substrate
4. Resistor
t
b
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14
LVK Series
Four Terminal High Precision Current Sense
LVK12 LVK20 LVK24 LVK25
A 1.90 ±0.10 2.90 ±0.1 3.43 ±0.2 3.43 ±0.2
B 3.50 ±0.10 5.35 ±0.1 6.63 ±0.2 6.63 ±0.2
W 8.0 ±0.2 12.0 ±0.2 12.0 ±0.3 12.0 ±0.3
F 3.5 ±0.05 5.5 ±0.05 5.5 ±0.05 5.5 ±0.05
E 1.75 ±0.1 1.75 ±0.1 1.75 ±0.1 1.75 ±0.1
P0 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1
P1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1
P2 2.0 ±0.05 2.0 ±0.05 2.0 ±0.05 2.0 ±0.05
D0 1.5 +0.1/-0 1.5 +0.1/-0 1.5 +0.1/-0 1.5 +0.1/-0
D1 1.0 +0.20/-0 1.5 +0.2/-0 1.5 +0.2/-0 1.5 +0.2/-0
T 0.2 ±0.05 0.2 ±0.05 0.2 ±0.05 0.2 ±0.05
T2 1.0 ±0.2 1.0 ±0.2 1.0 ±0.2 1.0 ±0.2
LVK25R005FER
Series Case Size
12 = 1206
20 = 2010
24 = 2412
25 = 1224
Tolerance
D=0.5%
F=1%
Ohms
R005 = 0.005 Taping Code
R=1,000 pc/reel
RoHS Compliant
13mm ±�0.2
60mm ±1
180mm ±3
9mm ±0.3 (LVK12)
13mm ±0.3 (LVK 20, 24, 25)
2mm ±0.5
13mm ±0.3 (LVK12)
15mm ±0.3 (LVK 20, 24, 25)
Series L W A B
LVK12 1.75 1.10 1.00 0.30
LVK20 2.55 1.55 1.40 0.50
LVK24 3.25 1.90 2.00 0.60
LVK25 1.40 3.30 2.20 1.00
W
L
B
A
LVK25 (1224)
Standard values
LVK12 LVK20 LVK24 LVK25
1% Tolerance
0.01 0.01 0.01 0.001
0.012 0.012 0.002
0.015 0.015 0.003
0.005
0.02 0.02 0.02 0.01
0.024 0.027 0.025
0.03 0.03 0.03
0.033 0.033
0.039 0.039 0.039
0.047 0.047
0.05 0.05 0.05
0.075 0.075
0.10 0.10
LVK12 LVK20 LVK24 LVK25
0.5% Tolerance
0.01 0.01 0.01 0.001
0.015 0.015 0.002
0.02 0.02 0.02 0.003
0.025 0.025 0.005
0.03 0.03 0.03 0.010
0.033 0.033
0.039
0.05 0.05 0.05
0.075
0.10 0.10
Land Pattern
DIMENSIONS
(mm, continued)
ORDERING INFORMATION
Reel
Tape
A
B
P0
P2
D0
E
FW
D1P1
T
T2
Direction
of feed
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MCS Series
Metal Element Current Sense
Resistive Metal Alloy mOhm Technology, SMD
Power Rating Resistance TCR (ppm/°C)
Series (@70°C) 5mΩ 10mΩ 15mΩ 20mΩ 25mΩ 30mΩ 40mΩ 50mΩ
MCS1632 1W <200 <70 <40 <40 <40 <40 <40 <40
MCS3264 2W <200 <70 <40 <40 <40 <40 <40 <40
CHARACTERISTICS
Resistance Range 0.005Ω - 0.05Ω
Color white (top) / green (bottom)
Power 1 and 2 watts at 70°C
Standard resistance
values (mΩ)
5, 10, 15, 20, 25, 30, 35, 50
TCR ±50ppm/°C (two standard series
of temperatures: 25°C, 0°C, -15°C,
-55°C and 25°C, 50°C, 75°C, 125°C,
150°C; temp. tolerance ±3°C; TCR =
(R2-R1)/R1(T2-T1)x106)
Tolerance 1%, 3%, 5%
Rated voltage (PxR)1/2
100
Percent Rated Power
Ambient Temperature, oC
60
20
0
80
40
0 50 70-55 100 150
Derating
Recommended
Solder Profile
NiCu or MnCu
Resistive Alloy
Material TCR ±10ppm/ϒK
96% Alumina Substrate
Thermo-dissipation
Protective Layer
Flame-retardant Epoxy
Protective Coat
Cu Electrode
Pb-free Termination
Marking
Epoxy UL-94-V0
Conformal
300
Temperature °C
Time (sec.)
Preheating
120 sec.
Soldering
Cooling
200
50
500 100 150 250200
0
250
100
150
60 sec.
10 sec.
FEATURES
•NiCuorMnCuresistivealloy;materialTCR
±10ppm/°K
•MarkingepoxyUL-94-V0conformal
•96%aluminasubstratethermodissipationprotec-
tive layer
•CuTerminalElectrodewithPbFreetermination
(60% Sn, 40% Ni)
•Flame-retardantepoxyprotectivecoat(UL-94-V0)
•Ultralowresistancevalue(0.005Ω~0.050Ω)
•Precisionresistancealloy(NiCr20AlSi,orCuMnNi);
materialselectedforlowTCR(<50ppm/°C)
•Superiortemperaturecoefficientcharacteristics;
resistancevs.temp.changefrom25°Cto125°C
within10ppm/°C~50ppm/°C
•Lowinductance,lowthermoEMF(<50µV/°C)
APPLICATIONS
•Industrialelectronics,powerelectronics:power
supply,DC/DCconverter,AC/DCconverter,motor
controller, automotive electronics
•Batterycharger,PC,PDA,3Cproducts,
Telecommunications, instruments, white goods
SERIES SPECIFICATIONS
Preheating: 145°C ±15°, max. 120 sec.
Soldering: min. 220°C, max. 60 sec.
Max. Temp.: 260°C ±5°, 10 sec.
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16
Power Ohm Qty./
Part Number Rating Value Reel
MCS1632R010FER 1W 0.01Ω 5000
MCS1632R015FER 1W 0.015Ω 5000
MCS1632R020FER 1W 0.02Ω 5000
MCS1632R025FER 1W 0.025Ω 5000
MCS1632R050FER 1W 0.05Ω 5000
MCS3264R005FER 2W 0.005Ω 4000
MCS3264R010FER 2W 0.01Ω 4000
MCS3264R015FER 2W 0.015Ω 4000
MCS3264R020FER 2W 0.02Ω 4000
MCS3264R025FER 2W 0.025Ω 4000
MCS3264R050FER 2W 0.05Ω 4000
MCS1632R005FER
Series
Metal Alloy
Current Sense
Case Size
1632 =1w
3264 =2w
Tolerance
F=1%
Ohms
R005 = 0.005‰
Taping Code
1632 = 5,000 pc/reel
3264 = 4,000 pc/reel
RoHS Compliant
Land Pattern
L
W
0.024"
0.60mm ±0.02 a
NL2
O
Packaging
(in./mm)
Tape width Reel diam. Weight
Size ±0.30mm ±0.50mm Pc/Reel (g ±10)
MCS1632 0.315/8.00 7.00/178.0 5000 131
MCS3264 0.472/12.00 7.00/178.0 4000 291
Solder
Size L W a Thickness (µm)
MCS1632 0.126/3.20 0.063/1.60 0.020/0.50 105
MCS3264 0.252/6.40 0.126/3.20 0.040/1.00 105
MCS3264R005FER 0.075/1.9 ±.2
Solder
Size Resistance L2 O N Thickness Loading
MCS1632 ≤8mΩ 0.60mm 1.84mm 2.80mm 105μm 1.0w
>8mΩ 1.20mm 1.84mm 2.50mm 105μm 1.0w
MCS3264 ≤8mΩ 1.60mm 3.57mm 3.85mm 105μm 2.0w
>8mΩ 3.10mm 3.57mm 3.10mm 105μm 2.0w
PERFORMANCE CHARACTERISTICS
Test Condition Maximum ∆R
Short Time Overload JIS C 5201 4.13; Overload voltage 2.5x rated voltage for 5 sec. ±(0.5% +0.0005Ω)
High Temp. Exposure JIS C 5202 7.11; Test chamber 155 ±3°C for 1000 +48/-0 hours ±(0.5% +0.0005Ω)
Low Temp. Storage JIS C 5202 7.1; Test chamber -55 ±3°C for 96 ±4 hours ±(0.5% +0.0005Ω)
Endurance under Damp and Load JIS C 5202 7.9; Temp. 60 ±2°C, relative humidity 90-95%, rated
DC voltage applied 90 min. on, 30 min. off for 1000 +48/-0 hours
±(0.5% +0.0005Ω)
Thermal Shock JIS C 5202 7.4; -55 ±3°C for 30 min. to room temp for 2-3 min.
to +150 ±2°C for 30 min. to room temp for 2-3 min., 100 cycles
±(0.5% +0.0005Ω)
Load Life JIS C 5202 7.10; Temp. 70 ±2°C, rated DC voltage applied 90
min. on, 30 min. off for 1000 +48/-0 hours
±(1% +0.0005Ω)
Solderability JIS C 5202 6.5; Solder temp. 235 ±5°C, 2 ±0.5 sec. immersion New solder min. 90% of terminal
Resistance to Solder Heat JIS C 5202 6.4; Solder temp. 260 ±5°C, 10 ±1 sec. immersion ±(0.5% +0.0005Ω)
Mechanical Shock JIS C 5202 6.2; Load 10N (1.02kgf) for 10 ±1 sec., middle of
specimen pressurized
±(0.5% +0.0005Ω)
Insulation Resistance JIS C 5202 5.6; DC 100 ±15V for 1 min. >102MΩ
MCS Series
Metal Element Current Sense
Resistive Metal Alloy mOhm Technology, SMD
DIMENSIONS
(in./mm±0.2)
ORDERING INFORMATION
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RW1/RW2 Series
Surface Mount Four Terminal Current Sense
TCR max. ±50 ppm/°C
Rated Ambient Temp. +70°C
Operating Temp. Range -55°C - +125°C
Power Rating Resistance Range Resistance Dielectric Withstanding TCR
Type (watts) E-12 (mΩ) Tolerance Voltage (max. ppm/°C) Qty./Reel
RW1S0CK 1 5mΩ - 50mΩ 1% 500V ±50 1000
RW2S0DK 2 5mΩ - 50mΩ 1% 500V ±50 1000
Derating
100
Percent Rated Power
Ambient Temperature, °C
60
20
0
0-20 125
80
40
-55 70-40 60 80 1401004020
125
Temperature Rise (ϒC)
Percent Rated Power
75
25
0
100
50
06080 1004020
RW2S0DK
RW1S0CK
Surface Temperature Rise
Input Detecting
Circuit
Output
R
W
Voltage Te rminal
(KELVIN terminal)
Current Te rminal
Typical Schematic
Parameter
Requirement ∆R
Limit Typical Test Method
Resistance Within
regulated
tolerance
— 25°C
T.C.R. Within
specified
T.C.R.
— +25°C/-55°C and +25°C/+125°C
Overload ±1.0% ±1.0% Rated power x 5 for 5 seconds
Resistance to Solder
Heat
±1.0% ±1.0% 260°C ± 5°C, 10 seconds ±1 second
Rapid Change of
Temperature
±1.0% ±0.5% -55°C (30 minutes), +125°C (30 minutes), 500 cycles
Moisture Resistance ±2.0% ±0.5% 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON,
0.5 hr OFF cycle
Endurance at 70°C ±1.0% ±0.5% 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
Low Temperature
Operation
±0.5% ±0.25% -55°C, 1 hour
High Temperature
Exposure
±0.5% ±0.25% +125°C, 100 hours
FEATURES
•Extremelylowresistanceandhighprecisiontolerance
•LowT.C.R.achieved(±50ppm/°C)
•FlameproofUL94-V-0
•Marking:Blackbodycolorwithwhitemarking
CHARACTERISTICS
PERFORMANCE DATA
SERIES SPECIFICATIONS
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18
RW1S0CK RW2S0DK
L 0.425±.02 (10.8±0.5) 0.504±.02 (12.8±0.5)
W 0.244±.012 (6.2±0.3) 0.323±.012 (8.2±0.3)
t 0.083±.008 (2.1±0.2) 0.122±.008 (3.1±0.2)
a 0.118±.012 (3.0±0.3) 0.197±.012 (5.0±0.3)
b 0.031±.008 (0.8±0.2) 0.039±.008) (1.0±0.2)
c 0.055±.02 (1.4±0.5) 0.079±.02 (2.0±0.5)
d 0.047±.02 (1.2±0.5) 0.079±.02 (2.0±0.5)
e 0.051±.012 (1.3±0.3) 0.087±.012 (2.2±0.3)
f 0.051±.012 (1.3±0.3) 0.087±.012 (2.2±0.3)
g 0.197±.004 (5.0±0.1) 0.236±.004 (6.0±0.1)
h 0.098±.004 (2.5±0.1) 0.118±.004 (3.0±0.1)
j 0.39 (10.0) 0.47 (12.0)
k 0.08 (2.0) 0.09 (2.3)
m 0.04 (1.0) 0.05 (1.15)
n 0.12 (3.0) 0.21 (5.3)
o 0.24 (6.0) 0.31 (8.0)
p 0.20 (5.0) 0.24 (6.0)
q 0.06 (1.6) 0.09 (2.2)
r 0.08 (2.0) 0.13 (3.2)
s 0.04 (1.0) 0.06 (1.6)
t
W
L
Molded
Resin Resistive
Element Current
Electrode
Voltage
Electrode
e
f
a
b h
g
d
cc
Type &
Power Rating
RW1S0CK = 1 watt
RW2S0DK = 2 watt
Ohms
R005 = 0.005�
R050 = 0.05�
Packaging
T= tape and reel
(optional)
Tolerance
F = 1%
D = 0.5%



Current
Sense
Resistor
Power Rating
(watts)
Ohms
10m ohms = 0.01�
Tolerance
F = 1%
D = 0.5%
The part itself will be
marked as follows:
RoHS Compliant
Standard Part Numbers for RW Series
Wattage: 1 watt 2 watt
Tolerance: 1% 0.5% 1%
Ohms Series: RW1S0CK----FET RW1S0CK----DET RW2S0DK----FET
0.00500 RW1S0CKR005FET RW1S0CKR005DET RW2S0DKR005FET
0.01000 RW1S0CKR010FET RW1S0CKR010DET RW2S0DKR010FET
0.02500 RW1S0CKR025FET RW1S0CKR025DET RW2S0DKR025FET
0.05000 RW1S0CKR050FET RW1S0CKR050DET RW2S0DKR050FET
Land Pattern
Dimensions for reference only
n
j
o
m
k
p
q
rs
RW1/RW2 Series
Surface Mount Four Terminal Current Sense
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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60S Series
Surface Mount
Metal Plate Current Sense
APPLICATIONS
•Currentsensing
•Lowinductance
•ACapplications
•Feedback
Power Resistance Rated Operating
TCR Rating Values Ambient Temp. Qty./
Type Tolerance (ppm/C°) (watts) (Ω) Temp. (°C) Range (°C) Reel
602SJR ±5% ±100 0.25 0.003, 0.005 +70°C -40 - +155 2000
605SJR ±5% ±100 0.5 0.002, 0.0375, +70°C -40 - +155 2000
0.005, 0.008
610SJR ±5% ±350 1 0.002, 0.003 +85°C -40 - +155 1500
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
0 100 20050 275
80
40
-40 70
Area of recommended operation
250155
Derating
Parameter Requirement Test Method (JIS C 5202)
Resistance Within regulated tolerance 25°C
T.C.R. Within specified T.C.R. Room temperature/100°C up
Resistance to
Solder Heat
±2.0% 350°C ± 10°C, 3 seconds
Solderability 95% coverage minimum 235°C ± 5°C, 5 seconds
Moisture
Resistance
±3.0% 40°C, 90 - 95% RH, 1000
hours, no load
Moisture
Resistance
±5.0% Power rating x 1/10, 40°C, 90
- 95% RH, 1000 hours, 1.5 hr
ON, 0.5 hr OFF cycle
Load Life ±5.0% Rating voltage, 1000 hours, 1.5
hr ON, 0.5 hr OFF cycle
FEATURES
•Superiorthermalexpansioncycling
•Inductancelessthan10nanohenries
•Flameproof
•Solderablepads:Tin(Sn)plate
•Leadflexibleforthermalexpansion
•Lowterminationstress(“J”terminals)
•Shapeprovidescooleroperation
•Customvaluesavailable
SERIES SPECIFICATIONS
CHARACTERISTICS
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20
M
O
N L N
W1
øA
øc
øB
E
0.059 0.069
(1.75 ± 0.1)
(
1.5
)
W
0.157
(4.0 ± 0.1)
0.315
(8.0 ± 0.1)
0.079
(2.0)
T1
A
B
Direction of Feed
Embossed Carrier
+0.1
-0
PACKAGING SPECIFICATIONS
inches (mm)
Tape
Type A B W T1
602SJR 0.057 0.134 0.079 0.098
(1.45 ± 0.2) (3.4 ± 0.2) (2.0) (2.5 ± 0.2)
605SJR 0.057 0.224 0.079 0.091
(1.45 ± 0.2) (5.7 ± 0.2) (2.0) (2.3 ± 0.2)
610SJR 0.461 0.169 0.945 ___
(11.7 ± 0.1) (4.3 ± 0.1) (24.0 ± 0.2) ___
Reel
Type A B C E W1 qty./reel
602SJR 10.0 3.15 0.511 0.079 1.0 2000
605SJR (255 +0.0 -3.0) (80 +1.0 -0) (13.0 ±0.2) (2.0 ±0.5) (25.5 ± 2.0)
610SJR 12.99 3.94 0.511 0.079 1.0 1500
(330 ± 2.0) (100 ± 2.0) (13.0 ± 0.2) (2.0 ± 0.5) (25.5 ± 2.0)
Land pattern
Type M N O L
602SJR 0.622 (16.0) 0.118 (3.0) 0.150 (3.8) 0.394 (10.0)
605SJR 0.622 (16.0) 0.118 (3.0) 0.236 (6.0) 0.394 (10.0)
610SJR 0.369 (9.36) 0.121 (3.07) 0.142 (3.60) 0.127 (3.22)
Land pattern dimensions are for reference only
Standard Part Numbers for 60S Series
Wattage: 0.25 watt 0.5 watt 1 watt
Ohms Series: 602SJR 605SJR 610SJR
0.00200Ω 605SJR00200E-T 610SJR00200E-T
0.00300Ω 602SJR00300E-T 610SJR00300E-T
0.00375Ω 605SJR00375E-T
0.00500Ω 602SJR00500E-T 605SJR00500E-T
0.00800Ω 605SJR00800E-T

Type &
Power Rating
602S = 0.25 watt
605S = 0.5 watt
610S = 1 watt
Ohms
R00200 = 0.00200�
R00300 = 0.00300�
R00375 = 0.00375�
Packaging
T= tape and reel
(optional)
Tolerance
J = 5%
RoHS Compliant
602SJR, 605SJR
L
H
W
L
2
L
2
L
W
610SJR
H
AD
Copper Nickel
Alloy
Te rmination
L L2 H W
602SJR 0.39 ± .008 0.018 ± .008 0.024 0.118 ± .008
(10.0 ± 0.2) (2 ± 0.2) (0.6 ± 0.1) (3.0 ± 0.2)
605SJR 0.39 ± .008 0.018 ± .008 0.079 0.20 ± .008
(10.0 ± 0.2) (2 ± 0.2) (2 max.) (5.2 ± 0.2)
L H D A W
610SJR 0.44 ± .016 0.137 ± .016 0.095 ± .010 0.189 ± .030 0.126 ± .016
(11.2 ± 0.4) (3.5 ± 0.4) (2.35 ± 0.25) (4.8 ± .75) (3.2 ± 0.40)
DIMENSIONS
inches (mm)
ORDERING INFORMATION
M
O
N L N
60S Series
Surface Mount
Metal Plate Current Sense
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SERIES SPECIFICATIONS
Wattage
1 Oper. Voltage (V) Resistance TCR2,3 VCR2
Series Type P70 (mW) std. untrimmed (≥5%) Range Tolerance (ppm) (ppm)
HVC0402--- 0402 50 30 60 100k-100M 5-10% 50, 100 500
>100M-1G 5-20% 250, 500 1000
>1G-10G 10-30% 1000, 2000 2000
HVC0603--- 0603 100 75 150 100k-100M 1-10% 50, 100 500
>100M-1G 5-20% 250, 500 1000
>1G-10G 5-20% 500, 1000 2000
HVC0805--- 0805 125 200 400 100K-100M 0.5-10% 25, 50, 100 100
>100M-1G 2-20% 50, 100, 250 250
>1G-10G 5-20% 250, 500 500
>10G-100G 10-30% 1000, 2000 2000
HVC1206--- 1206 250 600 1000 100K-100M 0.5-10% 25, 50, 100 50
>100M-1G 2-20% 50, 100, 250 100
>1G-10G 5-20% 50, 100, 250 250
>10G-100G 10-30% 250, 500, 1000 1000
HVC2512--- 2512 1000 2000 3000 100K-100M 0.5-10% 25, 50, 100 10
>100M-1G 1-20% 25, 50, 100 25
>1G-10G 2-20% 25, 50, 100 50
>10G-100G 5-30% 100, 250, 500 100
HVC4020--- 4020 1500 4000 6000 100k-100M 0.25-10% 25, 50, 100 5
>100M-1G 0.5-20% 25, 50, 100 10
>1G-10G 1-20% 25, 50, 100 10
>10G-100G 2-30% 50, 100, 250 50
>100G-1T 5-30% 250/500 250
1. At continuous power dissipation the dimensions of the solder pads have to be capable of sufficient heat conduction.
2.NotallTCR/VCRcombinationsavailableinallresistancevalues
3.HVC2512andHVC402010M-10GTCR’savailable:10ppmand15ppm
CHARACTERISTICS
Operating temperature
range
-55°C ~ +155°C
Climatic category 55/155/56, acc. to EN 60068-1
Solderability 250°C, 3s, acc. to EN 60068-2-58
Max. soldering temperature 260°C, 10s, acc. to IEC 68-2-58
Long Term Stability <1G <10G ≥10G
Load Life 70°C/1000h <0.25% <0.5% <1%
Storage 125°C/1000h <0.5% <1% <2%
Max. Voltage/1000h <0.5% <1% <2%
Data not specified according to EN 140401-802 (CECC 40401-802)
HVC Series
Precision High-Value High-voltage Wraparound Chip
FEATURES
•Highvaluechipresistorsinthickfilmtechnology
•Lowtemperatureandvoltagedependency(lowTCRandVCR)
•Highworkingvoltageupto3000V
•Suitableforhighvacuumapplications—noorganics
•Contactareas:Nickel-barrier/mattetin
•Wraparoundterminals
100
Percent Rated Power
Ambient Temperature, °C
60
20
0
80
40
050 100 15570-55
Derating
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22
DIMENSIONS
(mm)
HOW TO ORDER
Power
Size Rating (mW) L W T a
0402 50 1.04 ±.05 0.50 ±.05 0.30 ±.05 0.1 +.1/-.05
0603 100 1.50 +.15/-.05 0.80 +.15/-.05 0.40 +.15/-.05 0.2 +.2/-.1
0805 125 2.00 +.15/-.05 1.25 +.15/-.05 0.40 +.15/-.05 0.3 +.2/-.1
1206 250 3.20 +.15/-.05 1.50 +.2/-.05 0.40 +.15/-.05 0.3 +.2/-.1
2512 1000 6.30 +.15/-.05 3.50 +.2/-.05 0.60 +.15/-.05 0.9 ±.2
4020 1500 10.20 +.20/-.05 5.10 +.2/-.05 0.60 +.20/-.1 0.9 ±.2
W
L T
a
HVC Series
Precision High-Value High-voltage Wraparound Chip
HVC1206T1004JET
Tolerance
D = 0.50%
F = 1%
G = 2%
J = 5%
K = 10%
M = 20%
P = 30%
Ohms
1004 = 1MΩ
5006 = 500MΩ
(ppm) TCR
W = 25
V = 50
T = 100
Z = 250
E = 500
N = 1000
U = 2000
Tape & Reel
500 pc/reel
RoHS Compliant
Package
Size
Series
High Voltage
Wrap Around Chip
TERMINAL DETAILS
Base Metal PdAg
Termination Finish 100% electroplated matte Sn100
Thickness of Finish 5 microns
Barrier Material between Base Metal and Finish Porosity-free Ni (5-8 microns thickness)
Baking/Annealing Process after Sn Plating 150°C; > 4 hours
Peak Process Body Temperature (Classification
Temperature) and Maximum Time
260°C for 10 seconds
Standard Part Numbers
HVC0402E5006KET
HVC0402N5007KET
HVC0402T1004JET
HVC0402T1005JET
HVC0402T1006JET
HVC0402T2504JET
HVC0402T2505JET
HVC0402Z2506JET
HVC0402T5004JET
HVC0402T5005JET
HVC0603N1007KET
HVC0603N5007KET
HVC0603T1004FET
HVC0603T1005FET
HVC0603T1006FET
HVC0603T2504FET
HVC0603T2505FET
HVC0603T5004FET
HVC0603T5005FET
HVC0603Z5006JET
HVC0805E1008KET
HVC0805T1004JET
HVC0805T1005JET
HVC0805T1006JET
HVC0805T2504JET
HVC0805T2505JET
HVC0805Z2506JET
HVC0805T5004JET
HVC0805T5005JET
HVC0805E5007JET
HVC0805Z1007JET
HVC0805Z5006JET
HVC1206T1004JET
HVC1206T1005JET
HVC1206T1006JET
HVC1206Z2504JET
HVC1206T2505JET
HVC1206Z2506JET
HVC1206T5004JET
HVC1206T5005JET
HVC1206Z5007KET
HVC1206Z1007JET
HVC1206Z1008KET
HVC1206Z5006JET
HVC2512T1004JET
HVC2512T1005JET
HVC2512T1006JET
HVC2512T1007JET
HVC2512T1008KET
HVC2512T2504JET
HVC2512T2505JET
HVC2512T2506JET
HVC2512T5004JET
HVC2512T5005JET
HVC2512T5006JET
HVC2512T5007JET
HVC4020V1004JET
HVC4020V1005JET
HVC4020V1006JET
HVC4020V1007JET
HVC4020V1008KET
HVC4020V2504JET
HVC4020V2505JET
HVC4020V2506JET
HVC4020Z2508KET
HVC4020V5004JET
HVC4020V5005JET
HVC4020V5006JET
HVC4020V5007JET
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 23
HVF Series
High Voltage
Flip Chip Film
100
Percent Rated Watts
Ambient Temperature, ϒC
60
20
0150
80
40
100050 200
70ϒ
Derating
Ohmite’sHighVoltageFlipChipSeriesincorporates
high accuracy screen printing technology to achieve
highvoltagecapabilityinastableflipchipSMDchip
resistorpackage.TheHVFSeriesoffersunmatched
performance in comparison to standard chip resis-
tors.Itsuniquedesignprovideslowervoltageand
temperature coefficients, less noise, tighter toler-
ances, better stability, higher resistance values, and
highervoltageratings.HVFisavailableinconvenient
1206 and 2512 footprints.
FEATURES
•Highvoltageupto3,000volts
•Industrystandardsizes
•Workingtemperaturerange–55°Cto200°C
•Designedforautomaticinsertion
•Non-magneticconstruction
SERIES SPECIFICATIONS
CHARACTERISTICS
Series Resistance Range Tol. Power Rating (mW) Voltage Rating*
HVF1206 1K-100M 1% std. 300 1,500
100M-10G 5%
10G-100G 10%
HVF2512 1K-100G 1% std. 1000 3,000
*Use Ohm’s Law (V= √P*R) to calculate maximum working voltage.
**Maximum available quantity per reel is 3,500 for 1206 size and 2,000 for 2512 size; call 1-866-9-OHMITE for
details.
Resistance Range 1KΩ to 100GΩ
Resistance Tolerance ±1% std.; 5% for HVF1206 100MΩ-10GΩ more; 10% for 10GΩ+
Temperature Coefficient ±100ppm std.
Coating Silicone
Solder Pad Material Silver (PdAg)
Note: HVF Series should not be used with tin-lead based solder compositions. Only silver-based solder composi-
tions are recommended. Care should be taken in the selection of the solder flux contained in the solder paste.
Some pastes are "corrosive" and can damage the coating and also the resistive layer during the soldering pro-
cess at high temperature. PCBs must be properly cleaned to remove any layers of moisture containing halides
below the resistor.
We recommend Halide Free (or Halogen Free) solder pastes, containing for example ROL0 or similar.
It is advisable for the PCB layout to provide a slot, or air gap, underneath the downward facing resistor element,
thereby increasing insulation resistance and reducing the possibility of capacitive coupling to the PCB. Under no
circumstances should any copper trace be present in the layout directly under the resistive element.
Voltage coefficient of Resistance
*Typical values. Voltage
coefficient of resistance
strongly depends on the
resistance value. Contact
Ohmite for details.
Resistance VCR
Series Range (-ppm/V)*
1206 1K ..10MΩ <3.20
10M ..100MΩ <15.00
100M ..1GΩ <29.00
1GΩ .. 5GΩ <40.00
2512 1K ..30MΩ <0.80
30M ..300MΩ <4.00
300M ..3GΩ <7.00
3GΩ .. 5GΩ <10.00
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
24
DIRECTION OF FEED
Trailer
230mm min.–560mm
max. May consist of
carrier and/or cover tape
followed by a minimum
of 160mm of carrier with
sealed cover tape
Leader
Minimum of 40
empty component
pockets sealed
with cover tape
Components
A
B
0.157 ±.004
4.0 ±0.10
0.059 +.004/-0.0
1.5 +0.10/-0.0
0.157 ±.004
4.0 ±0.10
0.079 ±.002
2.0 ±0.05
0.032 ±.004
0.81 ±0.10
0.315 ±.012
8.0 ±0.30
0.069 ±.004
1.75 ±0.10
0.138 ±.002
3.5 ±0.05
0.512 ±.008
13.0 ±.20
1.969 min.
50.0 min.
7.00 ±.079
178.0 ±2.0
0.56 max.
14.2 max.
0.331 +.059/-0.0
8.4 +1.5/-0.0
Reel
HVF1206T1004JET
High Voltage
Flip Chip
Series
Case Size
1206
2512
Tolerance
F=1%
G=2%
J=5%
Ohms
First 3 digits are
significant; last
digit specifies
number of zeros to
follow. Example:
1006 = 100M�
Taping Code
blank = bulk package
T = tape & reel
RoHS
Compliant
TCR
T = 100 ppm
V = 50 ppm*
*Not available for all resistance
values; consult factory
Standard part numbers
Ohms HVF1206--- HVF2512---
25K ---T2502FE ---T2502FE
50K ---T5002FE ---T5002FE
75K ---T7502FE ---T7502FE
100K ---T1003FE ---T1003FE
250K ---T2503FE ---T2503FE
500K ---T5003FE ---T5003FE
1000K ---T1004FE ---T1004FE
1500K ---T1504FE ---T1504FE
2000K ---T2004FE ---T2004FE
2500K ---T2504FE ---T2504FE
5000K ---T5004FE ---T5004FE
7500K ---T7504FE ---T7504FE
1G ---T1007JE ---T1007FE
5G ---T5007FE
10G ---T1008JE
L
T
a
W
Silicone Aluminum Oxide
Ruthenium Oxide Silver (PdAg)
Series L W a T (max.) M N O L
HVF1206 0.128 0.063 0.018 0.028 0.150 0.040 0.080 0.070
HVF2512 0.252 0.126 0.026 0.032 0.288 0.062 0.140 0.164
Land pattern
Land pattern
dimensions are
for reference only
L
O
M
N
Insulation Resistance >10,000 MΩ 500 Volt 25 °C 75% relative humidity
Dielectric Strength >1,000 Volt 25 °C 75% relative humidity
Thermal Shock ∆ R/R < 0.1% typ., 0.50% max. MIL Std. 202, method 107, Cond. C (IEC 68 -2 -14)
Overload ∆ R/R < 0.1% typ., 0.50% max. 1,5 x Pnom, 5 sec (do not exceed max. voltage)
Moisture Resistance ∆ R/R < 0.1% typ., 0.50% max. MIL Std. 202, method 106 (IEC 68 -2 -3)
Load Life ∆ R/R < 0.1% typ., 0.50% max. 1000 hours at rated power (IEC 115 -1)
HVF Series
High Voltage
Flip Chip Film
PERFORMANCE DATA
DIMENSIONS
(in. ±0.008)
ORDERING INFORMATION
TAPE AND REEL
Per EIA Std. RS-481
Standard Qty/Reel is 1000; maximum available quantity per reel is 3,500 for
1206 size and 2,000 for 2512 size; call 1-866-9-OHMITE for details.
Tape
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 25
Macrochip Series
High Voltage/High Resistance
Precision Thick Film Surface Mount
Resistance Power Voltage Standard Temp. Coefficient 85°-125°C
Series Range (Ohms) @25°C Rating 50PPM/°C 100PPM/°C
MC101 100Ω to 1,000M 0.75W 2.0KV 100Ω-100M 101M-1,000M
MC102 200Ω to 5,000M 1.50W 5.0KV 200Ω-250M 251M-5,000M
MC103 250Ω to 5,000M 2.00W 7.5KV 250Ω-100M 101M-5,000M
MC104 1K to 5,000M 2.50W 10.0KV 500Ω-450M 451M-5,000M
MC202 500Ω to 5,000M 2.50W 5.0KV 500Ω-200M 201M-5,000M
MC204 1K to 5,000M 3.25W 10.0KV 1K-375M 376M-5,000M
Contact Ohmite for custom configurations.
PERFORMANCE DATA
Characteristic Test Method Specification
Humidity MIL-STD-202, Method 103B,
Condition B
±0.25%
Dielectric Withstanding
Voltage
MIL-STD-202, Method 301,
750V
±0.25%
Insulation Resistance MIL-STD-202, Method 302,
Condition A or B
>10,000M or
greater dry
Thermal Shock MIL-STD-202, Method 107G,
Condition B, B-1, or F
±0.20%
Load Life MIL-STD-202, Method 108A,
Condition D
±1.0%
Resistance to Solvents MIL-STD-202, Method 215G No degrada-
tion of coating
or marking
Shock (Specified Pulse) MIL-STD-202, Method 213B,
Condition I
±0.25%
Vibration, High
Frequency
MIL-STD-202, Method 204D,
Condition D
±.020%
Power Conditioning MIL-R-49462A, Par 4.8 ±0.50%
Ohmite’s MacroChip resistors bring
precision high voltage capabilities to
surfacemountapplications.Designed
with thick film on alumina substrate
technology, the resistors can be pro-
vided in precision tolerances, high volt-
age ratings, and high resistance values.
The planar package design is low profile
for easy use with instrumentation, medi-
calequipment,voltageregulators,and
power supplies.
FEATURES
•Non-inductivedesign(less
than 50 nanohenries)
•Lowvoltagecoefficient
•Surfacemount
•PdAgterminations
•J-bendterminalsforapplica-
tions involving shock and
vibration
SERIES SPECIFICATIONS
CHARACTERISTICS
Resistor Thick film on Alumina
Resistance Range 100 Ohms to 5,000M
Power Rating 0.75W to 3.25W
Voltage Rating 2.0KV to 10.0KV
Tolerance 0.5% to 20%
Operating
Temperature
-55°C to +180°C
TCR and VCR See chart below
Solder Silver solder is recommended for
Macrochip resistors. Leaching of
the silver in the termination will
occur if non-silver solder is used.
60/40 tin-lead solders are not
recommended for use with the
Macrochip product.
Recommended Solder Profile
300
Temperature °C
Time (sec.)
Preheating
120 sec.
Soldering
Cooling
200
50
500 100 150 250200
0
250
100
150
60 sec.
10 sec.
Preheating: 145°C ±15°,
max. 120 sec.
Soldering: min. 220°C,
max. 60 sec.
Max. Temp.: 260°C ±5°,
10 sec.
APPLICATIONS
•Medicalinstrumentation
•PowerSupplies
•Avionics
•LightMagnificationSystems
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
26
MC102821006JER
Macro Chip
Series
Terminal
5 = J-bend
6 = SMD
8 = No term.
Style
101
102
104
202
204
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Coating
2 = Blue silicone
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
10R2 = 10.2 ohms
1000 = 100 ohms
1503 = 150,000 ohms
E = RoHS
compliant
Tape and Reel
optional
B
A
0.050" (1.27 mm)
two places
0.030" ±0.005
(0.76 mm ±0.13)
B'
0.14"
(3.6mm)
0.055" typ.
(1.40mm)
NAS CC21AA-D22W-OFA
J Lead 0.050" centers
With Terminal Options:
J-bend
0.065"
(1.65mm)
0.035" typ.
(0.89mm)
SMD
Land Pattern
Land pattern dimensions are for
reference only.
L
O
M
N
Size M N O L
MC101 0.280 0.080 0.278 0.120
MC102 0.530 0.080 0.278 0.370
MC103 0.780 0.080 0.278 0.620
MC104 1.030 0.080 0.278 0.870
MC202 0.530 0.080 0.556 0.370
MC204 1.030 0.080 0.556 0.870
Qty./Reel
Series Power A ±.01” B ±.01” B’ max. (J-bend) w/J-bend w/o J-bend
MC101 0.75W 0.25” (6.35) 0.25” (6.35) 0.29” (7.37) 1000 2500
MC102 1.50W 0.25” (6.35) 0.50” (12.70) 0.54” (13.72) 1000 2500
MC103 2.00W 0.25” (6.35) 0.75” (19.05) 0.79” (20.07) 1000 2500
MC104 2.50W 0.25” (6.35) 1.00” (25.40) 1.04” (26.42)
MC202 2.50W 0.50” (12.70) 0.50” (12.70)
MC204 3.25W 0.50” (12.70) 1.00” (25.40)
Contact Ohmite for custom configurations.
Macrochip Series
High Voltage/High Resistance
Precision Thick Film Surface Mount
DIMENSIONS
(in./mm)
ORDERING INFORMATION
Temp. Coeff. of Resistance*
0°C-85°C 85°C-125°C Voltage Coeff. of Resistance**
Resistor Series 25 PPM/°C 50 PPM/°C 100 PPM/°C < 2PPM/Volt < 5PPM/Volt
MC101 100 to 800M 100Ω to 100M 101M to 1,000M 100Ω to 270M 271M to 1,000M
MC102 200 to 1,500M 200Ω to 250M 251M to 5,000M 200Ω to 640M 641M to 5,000M
MC103 250 to 800M 250Ω to 440M 441M to 5,000M 250Ω to 1,100M 1,101M to 5,000M
MC104 500 to 2,500M 500Ω to 450M 451M to 5,000M 500Ω to 1,100M 1,101M to 5,000M
MC202 500 to 1,500M 500Ω to 200M 201M to 5,000M 500Ω to 520M 521M to 5,000M
MC204 1K to 1,750M 1K to 375M 376M to 5,000M 1K to 950M 951M to 5,000M
*TCR of 25ppm for temperature range of 0°C-85°C. TCR of 50ppm and 100ppm for -55°C to 125°C.
Consult factory for TCR values operating higher than 125°C
**VC’s of <2PPM/Volt are available. Contact Ohmite with your requirement.
1K MC102821001JE
2.5K MC102822501JE
5K MC102825001JE
7.5K MC102827501JE
10K MC102821002JE
12.5K MC102821252JE
15K MC102821502JE
17.5K MC102821752JE
20K MC102822002JE
25K MC102822502JE
TEMP./VOLTAGE COEFFICIENTS OF RESISTANCE
Standard Part Numbers
Series: MC10282 Tolerance: 5% Watts: 1W
Ohms Part Number Ohms Part Number Ohms Part Number
50K MC102825002JE
75K MC102827502JE
100K MC102821003JE
125K MC102821253JE
150K MC102821503JE
200K MC102822003JE
250K MC102822503JE
500K MC102825003JE
750K MC102827503JE
1M MC102821004JE
1.25M MC102821254JE
1.5M MC102821504JE
1.75M MC102821754JE
2M MC102822004JE
2.5M MC102822504JE
5M MC102825004JE
10M MC102821005JE
25M MC102822505JE
50M MC102825005JE
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 27
MC4 Series
High Voltage 4-Resistor SMD DIP Package
Resistance Power @25°C Max. Operating Standard Temperature Coefficient
Series Range (Ohms) per resistor Voltage 50PPM/°C 100PPM/°C
MC4 200Ω to 5,000M 0.75W 2,500 200Ω-250M 251M-5,000M
PERFORMANCE DATA
Characteristic Test Method Specification
Humidity MIL-STD-202, Method 103B,
Condition B
±0.25%
Dielectric Withstanding
Voltage
MIL-STD-202, Method 301,
750V
±0.25%
Insulation Resistance MIL-STD-202, Method 302,
Condition A or B
>10,000M or
greater dry
Thermal Shock MIL-STD-202, Method 107G,
Condition B, B-1, or F
±0.20%
Load Life MIL-STD-202, Method 108A,
Condition D
±1.0%
Resistance to Solvents MIL-STD-202, Method 215G No degrada-
tion of coating
or marking
Shock (Specified Pulse) MIL-STD-202, Method 213B,
Condition I
±0.25%
Vibration, High
Frequency
MIL-STD-202, Method 204D,
Condition D
±.020%
Power Conditioning MIL-R-49462A, Par 4.8 ±0.50%
Ohmite’s MC4 Series offers 4 high
voltageSMDresistorsinasingleDIP
package, supplied on tape and reel for
automated placement. Each resistor pro-
vides a rating of 0.75W with a maximum
voltageof2500VDC.Designerscan
specify up to 4 different resistor value/
tolerance combinations and connect then
individually, in series, or parallel to derive
countless results. The flexible S-Bend ter-
minals provide solder joint integrity while
leaving space between the resistor pack
and the PCB. Standard parts are available
in single resistance values for immediate
delivery.
SERIES SPECIFICATIONS
POSSIBLE CONFIGURATIONS
CHARACTERISTICS
Resistor Thick film on Alumina
Resistance Range 200 ohms to 5,000M
Power Rating 0.75W per resistor, 3.0W total
Voltage Rating 2500 VDC per resistor
Tolerance 5% to 20%
Operating
Temperature
-55°C to +180°C
TCR and VCR see Slim Mox
Solder Silver solder is recommended for
MC4 resistors. Leaching of the
silver in the termination will occur if
non-silver solder is used. 60/40 tin-
lead solders are not recommended
for use with the MC4 product.
4 individual
0.75W each
2500 VDC each
2 pairs in parallel
1.5W each
2500 VDC each
4 in series
3W
10,000 VDC
4 in parallel
3W
2500 VDC
2 pairs in series
1.5W each
5000 VDC each
3 in parallel
2.25W
2500 VDC
1 individual
0.75W
2500 VDC
2 in series
1.5W
5000 VDC
2 in parallel
1.5W
2500 VDC
3 in series
2.25W
7500 VDC
1 individual
0.75W
2500 VDC
FEATURES
•Uniqueterminalsallowspacing
between board and resistor
•Designallowsmultipleconfigura-
tions
•2,500voltsmax.perresistor
perpack;10KVtotal
•Suppliedontape&reelfor
automated placement
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
28
Land Pattern
MC4 Series
High Voltage 4-Resistor SMD DIP Package
DIMENSIONS
(in./mm)
ORDERING INFORMATION
Standard Part Numbers
Part Description
MC4-1003JER 100K ohms per resistor, 5%
MC4-5003JER 500K ohms per resistor, 5%
MC4-1004JER 1M ohms per resistor, 5%
MC4-5004JER 5M ohms per resistor, 5%
MC4-1005JER 10M ohms per resistor, 5%
MC4-5005JER 50M ohms per resistor, 5%
MC4-1006JER 100M ohms per resistor, 5%
MC4-5006JER 500M ohms per resistor, 5%
MC4-1007KER 1G ohms per resistor, 10%
MC4-5007KER 5G ohms per resistor, 10%
*Custom part numbers are assigned sequen-
tially. MC4-SP0001, MC4-SP0002, etc. Go to
this link to design your own MC4 resistor and
have a unique part number assigned. www.
ohmite.com/mc4sp/
Tape and Reel Orientation
R2
R1
R4
R3
0.676"
(17.17mm)
0.71" ±.01
(18.03mm)
0.750" max.
(19.05mm)
0.75" ±.01
(19.05mm)
0.190" typ.
(4.8mm)
0.03"
(0.76mm)
MC4-1002FER
MC4 Series Tolerance
J= 5%
K=10%
P=20%
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
1003 = 100KΩ
5004 = 5MΩ
1007 = 1GΩ
E = RoHS
compliant
Tape and Reel
optional
250 per reel
0.650"
(16.5mm)
0.080"
(2.0mm)
0.740"
(18.8mm)
0.580"
(14.7mm)
0.110"
(2.8mm)
0.080"
(2.0mm)
Design online at:
www.ohmite.com/mc4sp/
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 29
ORDERING INFORMATION
DIMENSIONS
(in./mm)
MC1RD Series
SMT-MOX Divider
Terminal “J” terminal 0.018" wide tin-plated copper
Resistor Thick film on Alumina
Resistance range 1MΩ- 5,000MΩ
Max. working voltage 5KV
Wattage 1.5W
Maximum ratio 5,000:1
Ratio TCR 100ppm; 25ppm and 10ppm available
Ratio tolerances 0.5% to 5%
0.05"
(1.3mm)
 
0.79" max.
(20.1mm)
0.52" max.
(13.2mm)
0.4" ±.010
(10mm
±
.3)
0.05" ±.010
(1.3mm
±
.3)
0.09"
(2.3mm)
0.15" max.
(3.8mm)
AcompletedescriptionoftheMC1RDDivideris
required.EXAMPLE:
RT=500MΩ 5%
R1=499.5MΩ 5%
R2=500KΩ 1%
Ratio=RT/R2=1,000:1,1%
TospecifyMC1RDDividers,pleaseseeourwebsite
at www.ohmite.com/dividers. Contact Ohmite for
custom configurations.
CHARACTERISTICS
Design online at:
www.ohmite.com/dividers/
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30
CHARACTERISTICS
Prefered Number Series
for Resistors
±1%, 2%: E96, E24
±5%, 10%: E24
Substrate Alumina
Resistor Thick Film
Coating glass overcoat
Terminal 100% nickel barrier inner layer with 100% matte tin outer
layer
Tolerance 1-10%
Derating Linearly from 100% at 70°C to 0% at 125°C
Isolation Voltage 500V (ex. MMC06: 100V)
Operating Temp. Range -55°~+125°
Mini Macro
Chip Series
High Voltage Thick Film SMD Chip
Derating
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
050 10025 75 125
80
40
70
Series TCR Power Rating (W) Voltage Isolation
(Size in./met.) Resistance Range ppm/°C @70°C Rating* Voltage
MMC06 470Ω~10MΩ ±100 0.1 200 100
(0603/1608) 47Ω~464Ω ±200
MMC08 100Ω~10MΩ ±1% & ±2% ±100 0.125 300 500
(0805/2012) 100Ω~51MΩ ±5% & ±10% ±100
47Ω~97.6Ω ±200
MMC12 100Ω~10MΩ ±1% & ±2% ±100 0.25 400 500
(1206/3216) 100Ω~51MΩ ±5% & ±10% ±100
47Ω~97.6Ω ±200
MMC25 560Ω~20MΩ ±1% & ±2% ±100 1.0 800 500
(2512/6332) 560Ω~51MΩ ±5% & ±10% ±100
100Ω~549Ω ±200
47Ω~97.6Ω ±500~-200
*Use Ohm’s Law (V= √ P*R) to calculate maximum working voltage.
Note: Limiting Element Voltage can only be applied to resistors when the resistance is equal to or higher than the critical resistance value.
FEATURES
•HighVoltageRatings
•SmallerPackageSizes
•LowCost
•WraparoundTerminals
SERIES SPECIFICATIONS
(continued)
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L W t A B Qty./Reel
MMC06 0.063 ±.004 0.031 ±.006 0.018 ±.004 0.012 ±.004 0.012 ±.004 5000
1.6 ±0.1 0.8 ±0.15 0.45 ±0.1 0.3 ±0.1 0.3 ±0.1
MMC08 0.079 ±.004 0.049 ±.004 0.022 ±.004 0.016 ±.008 0.016 ±.008 5000
2.0 ±0.1 1.25 ±0.10 0.55 ±0.1 0.4 ±0.2 0.4 ±0.2
MMC12 0.126 ±.004 0.063 ±.006 0.022 ±.004 0.020 ±.01 0.020 ±.01 5000
3.2 ±0.1 1.6 ±0.15 0.55 ±0.1 0.5 ±0.25 0.5 ±0.25
MMC25 0.248 ±.004 0.126 ±.006 0.022 ±.004 0.024 ±.008 0.024 ±.008 4000
6.3 ±0.1 3.2 ±0.15 0.55 ±0.1 0.6 ±0.2 0.6 ±0.2
MMC12J4704ETP
Packaging
TP = Paper tape
(use on MMC06,
MMC08, MMC12)
TR = Embossed tape
(use on MMC25)
Type Tolerance
F= 1%
G= 2%
J= 5%
K=10%
Resistance
First 3 digits are
significant; 4th digit
is multiplier (# of
zeroes to follow).
Examples:
4704 = 4,700,000
1214 = 1,210,000
Use E96 values for 1%
Use E24 values for 5%
RoHS Compliant
Wattage
06 = 0.1
08 = 0.125
12 = 0.25
25 = 1.0
Note: Units are marked with 3-digit (E24 Series) or 4-digit (E96 Series). 4-digit
marking not available on MMC06 sizes.
Land Pattern
(in.) Dimensions are for reference only
L
O
M
N
Size M N O L
MMC06 0.075 0.024 0.041 0.027
MMC08 0.095 0.032 0.069 0.031
MMC12 0.146 0.040 0.080 0.066
MMC25 0.272 0.048 0.150 0.176
L
W
A
t
B
Mini Macro
Chip Series
High Voltage Thick Film SMD Chip
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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32
Surface Mount
Power
RC Series: carbon composition (1/4 & 1/2 watt)
RC Series: ceramic composition (above 1/2 watt)
RF Series: metal film
RW Series: wirewound
RP Series: power film
RM Series: high voltage thick film
FEATURES
•Tolerance1%,5%,10%,dependingonconstruction
•Twelvewattageratings
•Sevenpackagesizes
•Twomountingdesignstoaccommodateyoursolderingprocess
•Fivepowerresistortechnologiestooptimizeyouroperatingperfor-
mance:
1. Carbon and Ceramic composition for surge and low inductance
2. Metal film for high ohmic value and low T.C.
3. Wire element for inrush current combined with low ohmic values.
Resistance values as low as 0.005Ω
4. Power film for high ohmic value and high wattage
5.HighVoltagethickfilmforhighvoltageapplications
•FlexibleJ-bendterminations
•WorkingTemperatureRange:-55°Cto+150°C
Flexible
J-bend
Standard
pedestal mount
Recessed-base
mount
SERIES SPECIFICATIONS
Power Maximum Resistance range Temp. Coefficient Dielectric Tape Size Quantity
Part Number (watts)* voltage 1% tol. 5% tol. 10% tol. 0.1Ω–1Ω 1Ω–10Ω 10Ω+ Withstanding 13” reels per reel
RC0S2CA––––– 0.25 250 — — 2.2Ω–5.6M — ±400 ±400 1000V 16mm 1500
RC0R5DB––––– 0.50 350 — — 2.2Ω–20M — ±400 ±400 1000V 24mm 1000
RW0S6BB––––– 0.6 50 0.010Ω–1K 0.005Ω–1K ±90 ±50 ±20 1000V 12mm 2500
RF0S8BA––––– 0.8 200 1Ω–5M — — ±100 ±100 1000V 12mm 2000
RW1S0BA––––– 1.0 50 0.005Ω–1K 0.005Ω–1K ±90 ±50 ±20 1000V 12mm 2000
RF1S0CA––––– 1.0 350 10Ω–1M 1Ω–10M — ±200 ±100 1000V 16mm 1500
RC1R0EA––––– 1.0 500 3.3-100K (10% tol only) -1300 1000V 32mm 750
RP1S3CA––––– 1.25 350 — 1Ω–1M — ±250 ±250 1000V 16mm 1500
RP1S5CA––––– 1.5 75 0.005Ω–1.5K 0.005Ω–1.5K ±90 ±250 ±250 1000V 16mm 1500
RP1S5CB––––– 1.5 350 — 1Ω–1M — ±250 ±250 1000V 16mm 1000
RP1R5CB–––––
RW2S0CB––––– 2.0 100 0.005Ω–5K 0.005Ω–5K ±90 ±50 ±20 1000V 16mm 1000
RW2R0CB–––––
RP2S0DA––––– 2.0 500 — 1Ω–1M — ±250 ±250 1000V 24mm 1000
RP2R0DA–––––
RW2S0DA––––– 2.0 100 0.005Ω–5K 0.005Ω–5K ±90 ±50 ±20 1000V 24mm 1000
RW2R0DA–––––
RP2R5DB––––– 2.5 500 — 1Ω–1M — ±250 ±250 1000V 24mm 1000
RW3R0DB––––– 3.0 200 0.005Ω–13K 0.005Ω–13K ±90 ±50 ±20 1000V 24mm 1000
RP3R0EA––––– 3.0 750 — 1Ω–1M — ±250 ±250 1000V 32mm 750
RW3R5EA––––– 3.5 350 0.005Ω–25K 0.005Ω–25K ±90 ±50 ±20 1000V 32mm 750
RM0R7EA––––– 0.75 2500 1KΩ–1000M 1KΩ–1000M — — ±50 1000V 32mm 750
*25°C ambient (continued)
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The temperature rise graph
data was obtained by a
selection of test substrate
size and trace width for
each resistor size to limit
operating temperatures to
safe values.
The operating temperature
safe rises are either 100°C
substrate temperature rise
or 180°C package hot spot
temperature rise at 25°C
ambient.
FR4: 0.062 in. thick; 0.062
in. traces
Alumina: 0.040 in. thick;
0.010 in. traces
Molding material rated at
205°C continuous.
100% 200% 300%
200
180
160
140
120
100
80
60
40
20
Temperature rise, ϒC
Percent Rated power
Alumina
Solder joint
FR4
Package limit hot spot temperature rise
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
80
40
25 50 100 150750 125
Derating
0.02
500
400
300
200
100
Ohms
0.04 0.06 0.08 0.10
Typical TCR for
less than 0.1Ω SMD
resistors (PPM/°C)
TCR
Surface Mount Power
Temp. cycle Load Life Immersion
(-55°C to 125°C, (1000 hours (260°C for Momentary
Construction 1000 cycles) at 25°C) 10 sec.) Overload
RC Carbon/Ceramic Comp. ±4.0%+.05Ω ±10.0%+.05Ω ±3.0%+.05Ω 6.3x rated power for 5 sec.
RF Metal Film ±0.5%+.05Ω ±0.5%+.05Ω ±0.1%+.05Ω 2x rated power for 0.1 sec.
RW Wirewound ±0.5%+.05Ω ±3.0%+.05Ω ±0.1%+.05Ω 5x rated power for 5 sec.
RP Power Film ±3.0%+.05Ω ±5.0%+.05Ω ±0.5%+.05Ω 2x rated power for 0.1 sec.
RN Wirewound, Non-inductive ±0.5%+.05Ω ±3.0%+.05Ω ±0.1%+.05Ω 5x rated power for 5 sec.
ALL models: Leaching (260°C Solder immersion, 60 sec.)....................... No visible leaching
Thermal Shock (Units at -55°C, then rated power applied).. No mechanical damage
Flammability ......................................................................... UL Material rating, UL94V0
PERFORMANCE DATA
Recommended Solder Profile
300
Temperature °C
Time (sec.)
Preheating
120 sec.
Soldering
Cooling
200
50
500 100 150 250200
0
250
100
150
60 sec.
10 sec.
Preheating: 145°C ±15°, max. 120 sec.
Soldering: min. 220°C, max. 60 sec.
Max. Temp.: 260°C ±5°, 10 sec.
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34
Surface Mount Power
Package Outline Dimensions PC Board Land Pattern
Packages A B C D G I J L M N O P
BA (in.) 0.246±.020 0.136±.005 0.133REF 0.110±.010 0.047±0.020 0.054±.012 0.136±.005 0.150 0.346 0.098 0.126 0.050
(mm) 6.248±.508 3.454±.127 3.378 REF 2.794±.254 1.194 ±0.508 1.372±.305 3.454±.127 3.81 8.79 2.49 3.20 1.27
CA (in.) 0.394±.020 0.159±.005 0.156REF 0.220±.010 0.062Nom. 0.078±.012 0.159±.005 0.256 0.524 0.134 0.126 0.060
(mm) 10.008±.508 4.039±.127 3.962 REF 5.588±.254 1.575 Nom. 1.981±.305 4.038±.127 6.50 13.31 3.40 3.20 1.52
CB (in.) 0.407±.020 0.226±.005 0.222REF 0.260±.010 0.062Nom. 0.084±.012 0.222±.005 0.276 0.537 0.131 0.126 0.093
(mm) 10.338±.508 5.74±.127 5.639 REF 6.604±.254 1.575 Nom. 2.134±.305 5.639±.127 7.01 13.64 3.33 3.20 2.36
DA (in.) 0.455±.020 0.240±.005 0.236REF 0.260±.010 0.062Nom. 0.143±.012 0.226±.005 0.317 0.585 0.134 0.155 0.093
(mm) 11.557±.508 6.096±.127 5.994 REF 6.604±.254 1.575 Nom. 3.632±.305 5.740±.127 8.05 14.86 3.40 3.94 2.36
DB (in.) 0.625±.020 0.273±.005 0.268REF 0.417±.010 0.062Nom. 0.143±.012 0.226±.005 0.474 0.742 0.134 0.155 0.093
(mm) 15.875±.508 6.934±.127 6.807 REF 10.592±.254 1.575 Nom. 3.632±.305 5.740±.127 12.040 18.85 3.40 3.94 2.36
EA (in.) 0.811±.020 0.273±.005 0.268REF 0.572±.010 0.093Nom. 0.143±.012 0.273±.005 0.611 1.000 0.195 0.155 0.093
(mm) 20.599±.508 6.934±.127 6.807 REF 14.529±.254 2.362 Nom. 3.632±.305 6.934±.127 15.52 25.4 4.95 3.94 2.36
BB (in.) 0.202±.010 0.10±.010 0.095REF 0.079±.010 0.050Nom. 0.065±.012 0.135±.005 0.078 0.328 0.125 0.126 0.026
(mm) 5.140±.508 2.54±.127 2.41 REF 2.00±.254 1.280 Nom. 1.640±.305 3.420±.127 1.98 8.33 3.18 3.20 0.66
J
I
C
B
K=0.006 Ref.
D
A
E
GH
Note 1 F=0.005 ±.001
Note 2
L
O
M
P
N
Recommended
for glue dot
application
Note 1: PackagesBAandCAareonlyavailablewithapedestalbase.PackagesCBandDAareavailableineitherpedestalorrecessedbase.PackagesDBandEA
are only available in a recessed base.
Note 2: Test point is .020 above PCB.
Note 3: TapeandreeldimensionsperEIA481Aexcept“EA”sizewhichis12mmcomponentpitchversus16mmpitch.
Size A nom. B C max. Quantity
12mm 13” 0.488"+0.078,–0.00 0.724" 2000pcs.BAor
12.4mm +2.0, –0.0 18.4mm 2500 pcs. BB
16mm 13” 0.646"+0.078,–0.00 0.882" 1500pcs.CAor
16.4mm +2.0, –0.0 22.4mm 1000 pcs. CB
24mm 13” 0.961"+0.078,–0.00 1.196" 1000pcs.DAorDB
24.4mm +2.0, –0.0 30.4mm
32mm 13” 1.276"+0.078,–0.00 1.52" 750pcs.EA
32.4mm +2.0, –0.0 38.4mm
Reel Dimensions
All reels are compatible with major pick-and-place machines
and made in accordance with EIA 481 A (except EA size,
which is 12mm component pitch versus 16mm pitch).
A
0.795*
20.2
min.
0.512 ±.008
13.0
±
.200
C
B
1.973
50
min.
0.059*
1.5
min.
Full
Radius
Tape Start Slot
Measured
at Hub
0.098 /
2.5
min. width
0.394 /
10
min. depth
Landpatterndimensionsareforreferenceonly
DIMENSIONS
(in./mm)
(continued)
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Standard Part Numbers for Surface Mount Power Resistors
RW1S0BA–––
RW1S5CA–––
RW2S0CB–––
RW2R0CB–––
RW2S0DA–––
RW2R0DA–––
RW3R0DB–––
RW3R5EA–––
RW0S6BB–––
RC1R0EA–––
BA CA CB CB DA DA DB EA BB EA
S S S R S R R R S R
1.0 1.5 2.0 2.0 2.0 2.0 3.0 3.5 0.6 1.0
Wirewound
3.30 –––3R30– K
4.70 –––4R70– K
5.00 –––5R00– F
5.60 –––5R60– J
6.80 –––6R80– K
7.50 –––7R50– J F
10.00 –––10R0– J J J F K
15.00 –––15R0– J J F K
20.00 –––20R0– J
22.00 –––22R0– F K
24.90 –––24R9– F
33.00 –––33R0– F K
36.00 –––36R0– F
47.00 –––47R0– J J F K
50.00 –––50R0– J
51.00 –––51R0– J
68.00 –––68R0– K
82.00 –––82R0– J
100.00 –––100R– J F K
120.00 –––120R– J
180.00 –––180R– J
300.00 –––300R– J
470.00 –––470R– J
1K –––1K00– J K
4.7K –––4K70– J
5K –––5K00– J
0.005 –––R005– J J F/J
0.010 –––R010– F/J J J F J J J F
0.015 –––R015– F/J J F
0.020 –––R020– J J F J J F
0.025 –––R025– J
0.027 –––R027– J
0.030 –––R030– F J J J F
0.033 –––R033– J
0.036 –––R036– J
0.050 –––R050– F/J J J F J J F
0.056 –––R056– J
0.075 –––R075– J F
0.080 –––R080– J J
0.100 –––R100– F/J J J F J J J F
0.150 –––R150– J J J
0.200 –––R200– J J J
0.220 –––R220– J
0.240 –––R240– J J F
0.300 –––R300– J J
0.330 –––R330– J
0.400 –––R040– J
0.400 –––R400– J
0.470 –––R470– J J J F
0.500 –––R500– J J J J
0.750 –––R750– J F
1.00 –––1R00– F/J J J J J F
2.00 –––2R00– F
RW1S0BA–––
RW1S5CA–––
RW2S0CB–––
RW2R0CB–––
RW2S0DA–––
RW2R0DA–––
RW3R0DB–––
RW3R5EA–––
RW0S6BB–––
RC1R0EA–––
Ohmic value
Part No.
Prefix
Suffix Tolerancesuffix: F=1%J=5%K=10%
Package style
Base: standard
or recessed
Wattage
BA CA CB CB DA DA DB EA BB EA
S S S R S R R R S R
1.0 1.5 2.0 2.0 2.0 2.0 3.0 3.5 0.6 1.0
Wirewound
Ohmic value
Part No.
Prefix
Suffix Tolerancesuffix: F=1%J=5%K=10%
Package style
Base: standard
or recessed
Wattage
(For example, the part
number shown is a wire-
wound resistor, 3.5 watt,
recessed base, 32mm tape
size, first case size [A],
1000 ohms 1% tolerance.)
Component type
R = resistor
Component Modifier
C = carbon/ceramic
composition
F = film
P = power film
W = wire
N = wirewound, non-inductive
Wattage
Examples:
1S3 = 1.25W
2S0 or 2R0 = 2.0W
3R5 = 3.5W
Type of Base
S = standard
R = recessed
Package
B = 12mm
C = 16mm
D = 24mm
E = 32mm
Package Modifier
A, B sequential
Resistance Value
R = Decimal
K = 1,000
M = 1,000,000
Tolerance
F= 1%
G= 2%
H= 3%
J= 5%
K=10%
Examples:
R249 = 0.249 ohms
24R9 = 24.9 ohms
2K49 = 2,490 ohms
T = Tape
and Reel
(optional)

E = RoHS compliant
Available Jan. 2006
ORDERING INFORMATION
Surface Mount Power
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36
RW Series
High Power SMD Wirewound Resistors
5 and 7 watt
FEATURES
•Finneddesignfacilitatescooling
•HighPowerDensity
•WideResistanceRange
•TightTolerance
•LowTCR
PERFORMANCE DATA
RW5S0 RW7S0
Power at 25°C
at 70°C
7 watts
5 watts
10 watts
7 watts
Resistance range 0.1Ω ~ 50K 0.1Ω ~ 100K
Non-inductive range 0.1Ω ~ 12.5K 0.1Ω ~ 20K
Tolerance 0.5%, 1%, 5%
Temperature Coefficient 0.1Ω ~ 0.99Ω: ±90ppm
1Ω ~ 10Ω: ±50ppm
10Ω+: ±20ppm
Operating temp. range -55°C ~ +155°C
Max. working voltage (PxR)1/2
Weight 5.67g 11.34g
CHARACTERISTICS
Temp. cycle (-55°C to 125°C, 1000 cycles) ±0.5%+.05Ω
Load Life (1000 hours at 25°C) ±1.0%+.05Ω
Immersion (260°C for 10 sec.) ±0.1%+.05Ω
Leaching (260°C Solder immersion, 60 sec.) No visible leaching
Thermal Shock (Units at -55°C, then rated power applied) No mechanical damage
Flammability UL Material rating UL94V0
Derating
100
Percent Rated Power
Ambient Temperature, oC
60
20
0
80
40
25 50 100 15075
70
0 125
Ohmite has used its thermal management expertise
toproduceauniqueresistordesign.Theresistor
body incorporates fins identical to a heatsink. These
fins, as with a heatsink, increase the surface area of
the part and allow for greater power dissipation. This
uniquedesignallowsasmallfootprintfortheSMD
device and a high power dissipation. These 5 and 7
watt resistors are extremely stable with a load life
drift of only 1%. A special flat has been designed in
to the part for pick and place operations.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 37
DIMENSIONS
±0.020 in. / ±0.51 mm
ORDERING INFORMATION
Standard part numbers For RW Series
Resistance Tolerance Part Number
0.10 1% RW5S0FAR100FE
1.0 1% RW5S0FA1R00FE
10 5% RW5S0FA10R0JE
20 5% RW5S0FA20R0JE
47 5% RW5S0FA47R0JE
100 5% RW5S0FA100RJE
470 5% RW5S0FA470RJE
1000 5% RW5S0FA1K00JE
4700 5% RW5S0FA4K70JE
10,000 5% RW5S0FA10K0JE
1.0 1% RW7S0FB1R00FE
10 1% RW7S0FB10R0FE
100 1% RW7S0FB100RFE
1000 1% RW7S0FB1K00FE
10,000 1% RW7S0FB10K0FE
100,000 1% RW7S0FB100KFE
RW Series
High Power SMD Wirewound Resistors
5 and 7 watt
Overall Dimensions
Length Width Height
RW5S0 0.806 / 20.47 0.365 / 9.27 0.406 / 10.31
RW7S0 1.128 / 28.65 0.471 / 11.96 0.51 / 12.95
Land Pattern
L M N O
5S0 (FA) 0.600 / 15.24 1.000 / 25.40 0.200 / 5.08 0.450 / 11.43
7S0 (FB) 0.890 / 22.61 1.330 / 29.59 0.220 / 5.59 0.520 / 13.21
Tape and Reel
FA (5S0) FB (7S0 )
Reel Hub Diameter 77mm 77mm
Reel Outer Diameter 560mm 560mm
Reel Width 46mm 46mm
Tape Width 44mm 44mm
Pitch 20mm 24mm
Component type
R = resistor
Component Modifier
W = wirewound
Wattage 70°C 25°C
5S0 = 5W 7W
7S0 = 7W 10W
Type of Base
S = standard
Package
FA = 5W
FB = 7W
Package Modifier
A, B sequential
Resistance Value
R = Decimal
K = 1,000
M = 1,000,000
Tolerance
D = 0.50%
F=1%
J=5%
Examples:
R249 = 0.249 ohms
24R9 = 24.9 ohms
2K49 = 2,490 ohms
T = Tape
and Reel
(optional)
5W=300/reel
7W=250/reel
E = RoHS compliant
RW5S0FA1K00FET
Power Rating and Temperature Rise
data based on the recommended
Land Patterns using 10 oz. copper
PCB. FR-4 material. 0.062" thick. 4
layer.
L
O
M
N
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
38
CHARACTERISTICS
TDH Series
35 Watt DPAK Package
Thick Film Power Surface Mount
Terminal Copper
Terminal Plating Lead Free Solder (97% Tin, 3% Silver)
Resistance Range 0.05Ω to 10KΩ other values on request
Tolerance ±1% to ±10% (0.5% on request)
Max. Operating Voltage 350V
Insulation Resistance 10GΩ min.
Power Rating Depends upon case temperature. See der-
ating curve.
DPAK style power package for surface
mounting applications; 35W power rating
at 25°C case temperature.
Working Temperature
Range
-55°C to +175°C
Solder Process The TDH35P cannot exceed 220°C (260°C
for the TDH35H) for more than 10 seconds
during soldering process.
Derating 100% @ 25°C to 0% @ 150°C curve refer-
enced to case temperature
Dielectric Strength 1,800VAC
Operating Temperature
Range
-55°C to +150°C
Temperature Coefficient 10Ω and above, ±50ppm/°C, referenced to
25°C, ∆R taken at +105°C. Between 1 and
10Ω, ±(100ppm+0.002Ω)/°C, referenced to
25°C, ∆R taken at +105°C. For under 10Ω:
0R6 - 9R9: 100PPM
0R4 - 0R59: 150PPM
0R2 - 0R39: 250PPM
0R1 - 0R19: 500PPM
0R05 - 0R09: 1000PPM
Inductance less than 20 nanohenries
Flatness less than 0.1mm tolerance
Test Condition Result
Load Life MIL–R–39009, 2,000 hours ∆R ±(1.0%
+0.01Ω)
Moisture
Resistance
MIL–Std–202, Method 106 ∆R =(0.5%
+0.01Ω) max.
Short Time
Overload
2 times rated power with
applied voltage not to exceed
1.5 times maximum continu-
ous operating voltage for 5
seconds
∆R ±(0.3%
+0.01Ω) max.
Thermal Shock MIL–Std–202, Method 107,
Cond. F
∆R =(0.3%
+0.01Ω) max.
Terminal
Strength
MIL–Std–202, Method 211,
Cond. A (Pull Test) 2.4N
∆R =(0.2%
+0.01Ω) max.
Vibration, High
Frequency
MIL-Std-202, Method 204,
Cond. D
ΔR =(0.2%
+0.01Ω) max.
Ohmite’sTDHresistorisaneconomi-
cal solution to intermediate power
applicationdesignrequirements.
TDH’sreliablethickfilmonalumina
substrate construction can be easily
heat sinked for higher power perfor-
mance.TDHresistorsareidealfor
pulse-loading, pre-charge, bleeder,
and snubber applications.
FEATURES
•35Wattpowerratingat25°C
•SMD-DPAKpackageconfigu-
ration
•Heatresistancetocooling
plate:Rth<4.28°C/W
•Amoldedcaseforenviron-
mental protection.
•Resistorelementiselectrically
insulated from the metal sink
tab.
Soldering note: During surface mount soldering the soldering
temperature profile must not cause the metal tab of this device to
exceed 220°C (260°C for the TDH35H)!
Derating
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
050 10025 75 125
80
40
150 175
35
21
7
0
28
14
Rated Power, W
Derating(thermalresistance):0.23W/°C(4.28°C/W).The
case temperature is to be used for purposes of establishing
the applied power limit. The case temperature measurement
must be made with a thermocouple contacting the center of
the component mounted on the designed heat sink. Thermal
grease should be applied propperly.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 39
DIMENSIONS
ORDERING INFORMATION
TDH35PR100JE-TR
Style Ohms
R = Decimal
Example:
R100= 0.10
1R00= 1.0
10K0= 10,000
Tolerance
F = 1%
J = 5%
K = 10%
RoHS Compliant
Non-compliant
version unavailable
Tape and reel
(optional)
750 per reel
Package
Modifier
P = low temp.
H = high temp.
10.1mm
0.9mm
5.08m
Tol. ±0.2mm unless otherwise noted
m
1.1mm
±
0.5
45°
4.5mm
1.5mm
±
0.5
0.6mm
1.5mm
±
0.5
0.5mm
8.6mm
0.5mm
4.8mm
1.4mm
7.87mm
8.51mm
2.63mm
3.81mm
2.54mm
1.65mm
Land
Pattern
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
Standard Part Numbers
Part Number
Ohms 5% Tolerance
0.10 TDH35PR100JE
0.15 TDH35PR150JE
0.20 TDH35PR200JE
0.25 TDH35PR250JE
0.30 TDH35PR300JE
0.36 TDH35PR360JE
0.47 TDH35PR470JE
0.50 TDH35PR500JE
0.75 TDH35PR750JE
1.0 TDH35P1R00JE
2.0 TDH35P2R00JE
3.0 TDH35P3R00JE
5.0 TDH35P5R00JE
7.5 TDH35P7R50JE
10 TDH35P10R0JE
15 TDH35P15R0JE
20 TDH35P20R0JE
Part Number
Ohms 5% Tolerance
25 TDH35P25R0JE
33 TDH35P33R0JE
39 TDH35P39R0JE
47 TDH35P47R0JE
68 TDH35P68R0JE
75 TDH35P75R0JE
100 TDH35P100RJE
150 TDH35P150RJE
200 TDH35P200RJE
250 TDH35P250RJE
300 TDH35P300RJE
500 TDH35P500RJE
750 TDH35P750RJE
1000 TDH35P1K00JE
1500 TDH35P1K50JE
2500 TDH35P2K50JE
3000 TDH35P3K00JE
5000 TDH35P5K00JE
16mm4.95mm
24mm
Tape Dimensions
750 pc./reel
TDH Series
35 Watt DPAK Package
Thick Film Power Surface Mount
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
40
FEATURES
•1%Tolerancestandard
•Smallestwirewoundonthemarket
•Availableinlowohmicvalues
2010 SMD
0.6 Watt Wirewound
Surface Mount Power
Flexible
J-bend
Standard
pedestal mount
Recessed-base
mount
Series Wattage Ohms Voltage
RW0S6BB 0.6 0.01-1K 50
PERFORMANCE DATA
The temperature rise graph
data was obtained by a
selection of test substrate
size and trace width for
each resistor size to limit
operating temperatures to
safe values.
The operating temperature
safe rises are either 100°C
substrate temperature rise
or 180°C package hot spot
temperature rise at 25°C
ambient.
FR4: 0.062 in. thick; 0.062
in. traces
Alumina: 0.040 in. thick;
0.010 in. traces
100% 200% 300%
200
180
160
140
120
100
80
60
40
20
Temperature rise, ϒC
Percent Rated power
Alumina
Solder joint
FR4
Package limit hot spot temperature rise
2010 Package
TCR
100
Percent Rated Power
Ambient Temperature, °C
60
20
0
80
40
25 50 100 150750 125
Derating
0.02
500
400
300
200
100
Ohms
0.04 0.06 0.08 0.10
Typical TCR for
less than 0.1Ω SMD
resistors (PPM/°C)
Power 0.6 watts at 25°C ambient
Voltage 50V max.
Tolerance 1%
Resistance range 0.010Ω–1KΩ
Temperature
Coefficient
0.1Ω–1Ω: ±90ppm
1Ω–10Ω: ±50ppm
10Ω+: ±20ppm
Dielectric
Withstanding Voltage
1000V
Tape Size 12mm, 13” reel, 2500 pcs. per reel
CHARACTERISTICS
SERIES SPECIFICATIONS
Temp. cycle (-55°C to 125°C, 1000
cycles)
±0.5%+.05Ω
Load Life (1000 hours at 25°C) ±3.0%+.05Ω
Immersion (260°C for 10 sec.) ±0.1%+.05Ω
Leaching (260°C Solder immer-
sion, 60 sec.)
No visible leaching
Thermal Shock (Units at -55°C, then
rated power applied)
No mechanical damage
Flammability UL Material rating UL94V0
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 41
0.078" / 1.98mm
0.126"
3.18mm
0.328" / 8.33mm
0.026" / 0.66mm
0.125"
3.20mm
Recommended
for glue dot
application
0.135" ±.005
3.420mm ±.127
0.065" ±.012
1.640mm ±.305
0.095" Ref.
2.41mm Ref.
0.10" ±.010
2.54mm ±.127
0.006 Ref.
0.079" ±.010
2.00mm ±.254
E
0.050" Nom.
1.280mm Nom.
0.005 ±.001
Note 2
0.202" ±.010
5.140mm ±.508
Component type
R = resistor
Component Modifier
W = wirewound
Wattage
0S6 = 0.6W
Type of Base
S = standard
Package
B = 12mm
Package Modifier
A, B sequential
Resistance Value
R = Decimal
K = 1,000
M = 1,000,000
Tolerance
F= 1%
Examples:
R249 = 0.249 ohms
24R9 = 24.9 ohms
2K49 = 2,490 ohms
T = Tape
and Reel
(optional)

E = RoHS compliant
Standard Part Numbers for 2010 SMD
Ohms Part Number
0.010 RW0S6BBR010FE
0.015 RW0S6BBR015FE
0.020 RW0S6BBR020FE
0.030 RW0S6BBR030FE
0.050 RW0S6BBR050FE
0.075 RW0S6BBR075FE
0.100 RW0S6BBR100FE
0.240 RW0S6BBR240FE
0.470 RW0S6BBR470FE
0.750 RW0S6BBR750FE
Note 2: Test point is .020
above PCB.
Note 3: Tape and reel
dimensionsperEIA481A
except“EA”sizewhichis12
mm component pitch versus
16mm pitch.
Landpatterndimensions
are for reference only
Reels are compatible with major pick-
and-place machines and made in accor-
dancewithEIA481A.
13" nom.
0.795*
20.2 min.
0.512 ±.008
13.0 ±.200
0.724"
18.4mm
0.488" +0.078/–0.00
12.4mm +2.0/–0.0
measured at hub
1.973
50 min.
0.059*
1.5 min.
Full
Radius
Tape Start Slot
0.098 / 2.5 min. width
0.394 / 10 min. depth
Ohms Part Number
1.00 RW0S6BB1R00FE
2.00 RW0S6BB2R00FE
5.00 RW0S6BB5R00FE
7.50 RW0S6BB7R50FE
10.00 RW0S6BB10R0FE
15.00 RW0S6BB15R0FE
24.00 RW0S6BB24R0FE
36.00 RW0S6BB36R0FE
47.00 RW0S6BB47R0FE
100.00 RW0S6BB100RFE
Land Pattern
TAPE AND REEL
DIMENSIONS
2010 SMD
0.6 Watt Wirewound
Surface Mount Power
ORDERING INFORMATION
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42
CS3 Series
Wire Element Four Terminal
Precision Current Sense
Terminal Material Kelvin Terminals; 97% Sn / 3% Ag solder over copper
Encapsulation Polyester over resistance element
Standard Resistance
Values
1 mΩ - 50 mΩ
Resistance
Tolerances
1%, 2%, 5%
Temperature
Coefficient
TC referenced to 25°C, ∆R taken at -15°C and +105°C,
60ppm/°C
Power Rating 3W at 70°C max. 40Amp permanent
Operating Temp. -55°C to 150°C
Storage Temp. -40°C to 85°C
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
050 10025 75 125
80
40
70 150
Load Life (1,000 hours at rated power at 70°C) ∆R 0.2% max.
Moisture Resistance (Mil-Std-202, Method 106, Cond. A) ∆R 0.2% max.
Thermal Shock (Mil-Std-202, Method 107) ∆R 0.2% max.
Derating
CSSC
C = current
S = sense voltage
TheCS3Seriesutilizesstateofthearttechnologyto
achieve highly reliable non-inductive performance.
The CS3 is ideal for current monitoring and control
applications.
FEATURES
•Valuesbeginningat1miliohm
•NonInductiveDesign
•FourterminalKelvinconnection
Internal Circuit
CHARACTERISTICS
PERFORMANCE DATA
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 43
Standard part numbers for CS3 series
Series CS3F
Tolerance 1%
Ohms
0.001 CS3FR001E
0.002 CS3FR002E
0.003 CS3FR003E
0.005 CS3FR005E
0.01 CS3FR010E
Series CS3F
Tolerance 1%
Ohms
0.015 CS3FR015E
0.02 CS3FR020E
0.025 CS3FR025E
0.03 CS3FR030E
0.036 CS3FR036E
0.05 CS3FR050E

Style Ohms
R = Decimal
Example:
R010 = 0.010
R005 = 0.005
Tolerance
F = 1%
G= 2%
J= 5%
RoHS Compliant
Non-compliant
version not
recommended for
new designs
C
S
S
C
21.7mm p1.20
0.854" p0.008
5.35mm p0.10
0.211" p0.004
16.4mm p0.20
0.646" p0.008
3.00mm p0.20
0.118" p0.008
3.00mm
0.118"
2.00mm
0.079"
1.10mm
0.043"
1.50mm
0.059"
0.80mm
0.031"
5.08mm
0.2"
7.62mm
0.3"
8.00mm p0.20
0.315" p0.008
5.08mm
0.2"
CS3 Series
Wire Element Four Terminal
Precision Current Sense
DIMENSIONS
(mm/in.)
ORDERING INFORMATION
Center of lead spacing
measured at resistor body
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44
10 Series
Axial Wire Element Current Sense
Two Terminal Axial
L max. D ±.010" /
±0.3mm
d ±.002" /
±0.05mm
M
1.562" ±0.062 /
39.7mm ±1.6
Series Wattage Ohms
12 2 0.005-0.10
13 3 0.005-0.20
15 5 0.005-0.25
Series Wattage Length “L” Diam. “D” “M” “d” (lead ga.)
12 2 0.416 / 10.6 0.094 / 2.4 1.156 / 29.4 20
13 3 0.570 / 14.5 0.205 / 5.2 1.310 / 33.3 20
15 5 0.935 / 23.8 0.330 / 8.4 1.675 / 42.5 18
FEATURES
•Idealforcurrentsensingapplications
•1%Tolerancestandard,othersavailable
•Fixedresistancemeasuringpoint“M”
•Lowinductance(non-inductivebelow0.25Ω)
•RoHScompliantproductavailable;add“E”suffixto
part number to specify
0
500
400
300
200
100
Milliohms
10 20 4030 50
600
700
0
ppm/ °C
2 watt
3 watt
5 watt
Temperature
Coefficient of
Resistance
Terminals Solder-plated copper terminals or copper clad steel depending
on ohmic value. RoHS solder is 96% Sn, 3.5% Ag, 0.5% Cu
Encapsulation Silicone molding compound
Derating Linearly from 100% @ +25°C to 0% @ +275°C
Tolerance ±1% standard; Others available
Power rating Based on 25°C free air rating
Overload 5 times rated wattage for 5 seconds
Dielectric withstanding voltage 1000 VRMS for 3 and 5 watt; 500 VRMS for 2 watt
Insulation resistance Not less than 1000MΩ
Thermal EMF Less than ±2µV/°C
Temperature range -55°C to 275°C
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS ORDERING INFORMATION
Standard part numbers
Ohmic
value 2 watt 3 watt 5 watt
0.005 12FR005E 13FR005E 15FR005E
0.010 12FR010E 13FR010E 15FR010E
0.015 12FR015E 13FR015E 15FR015E
0.020 12FR020E 13FR020E 15FR020E
0.025 12FR025E 13FR025E 15FR025E
0.030 12FR030E 13FR030E 15FR030E
0.040 12FR040E 13FR040E 15FR040E
0.050 12FR050E 13FR050E 15FR050E
0.060 12FR060E 13FR060E 15FR060E
0.070 12FR070E 13FR070E 15FR070E
0.080 12FR080E 13FR080E 15FR080E
0.090 12FR090E 13FR090E 15FR090E
0.100 12FR100E 13FR100E 15FR100E
0.150 13FR150E 15FR150E
0.200 13FR200E 15FR200E
0.250 15FR250E
Ohm Value
Example:
R050= 0.05
Tolerance
F=1%
D= 0.5%
10 Series
Wattage RoHS Compliant
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 45
L +.015 /
+0.4
D +.015 /
+0.4
A (min.) B ±.010 /
±
0.03
0.032 ±.002
0.81
±
.05
(20 AWG)
Series Wattage Ohms
13 3 0.005-0.1
14 4.5 0.005-0.1
17 7 0.005-0.1
Series Wattage Length Diam. A B
13 3 0.625/15.9 0.200/5.08 1.25/31.8 0.125/3.18
14 4.5 1.060/26.9 0.335/8.51 1.50/38.1 0.200/5.08
17 7 1.500/38.1 0.375/9.53 1.50/38.1 0.200/5.08
Terminals Tinned Copper Leads
Encapsulation Silicone Molding Compound
Derating Linearly from 100% at +25˚C to 0% at
+200˚C
Resistance Range 0.005Ω to 0.100Ω standard
Standard Tolerance ±1%; others available
Operating Temp. Range -55˚C to +200˚C
Temperature Coefficient
of Resistance
(0˚C to 85˚C) ≥0.015Ω: ±50 PPM/˚C;
<0.015Ω: ±100 PPM/˚C
Environmental
Performance
Exceeds the requirements of MIL-
PRF-49465
Power rating Based on 25˚C free air rating.
Overload 5 times rated wattage for 5 seconds
Max. Current 22 amps
Dialectric withstanding
voltage
1500 VAC for 4.5 and 7 watt; 1000
VAC for 3 watt
Insulation resistance Not less than 1000 MΩ
Thermal EMF Less than ±2µV/˚C
Ohmite’sFour-terminalCurrent-senseResistorsare
specifically designed for low-resistance applications
requiringthehighestaccuracyandtemperature
stability. This four-terminal version of Ohmite’s 10
Series resistor is specially designed for use in a
Kelvinconfiguration,inwhichacurrentisapplied
through two opposite terminals and sensing voltage
is measured across the other two terminals .
TheKelvinconfigurationenablestheresistance
and temperature coefficient of the terminals to be
effectively eliminated. The four terminal design
also results in a lower temperature coefficient of
resistance and lower self-heating drift which may be
experiencedontwo-terminalresistors.Therequire-
ment to connect to the terminals at precise test
points is eliminated, allowing for tighter tolerancing
on the end application.
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
10 Series
Axial Wire Element Current Sense
Four Terminal Axial
FEATURES
• Ideal for current sensing applications
• 1% Tolerance standard, others available
• Low Inductance (non-inductive below 0.25Ω)
• Tinned Copper Leads
• RoHS Compliant
ORDERING INFORMATION

Ohm Value
Example:
R050= 0.05�
Tolerance
F=1%
D= 0.5%
10 Series
Wattage
Terminals
Blank =2 terminals
P=4 terminals RoHS Compliant
Standard part numbers
Ohmic
value 3 watt 4.5 watt 7 watt
0.005 13FPR005E 14FPR005E 17FPR005E
0.010 13FPR010E 14FPR010E 17FPR010E
0.015 13FPR015E 14FPR015E 17FPR015E
0.020 13FPR020E 14FPR020E 17FPR020E
0.025 13FPR025E 14FPR025E 17FPR025E
0.030 13FPR030E 14FPR030E 17FPR030E
0.040 13FPR040E 14FPR040E 17FPR040E
0.050 13FPR050E 14FPR050E 17FPR050E
0.060 13FPR060E 14FPR060E 17FPR060E
0.070 13FPR070E 14FPR070E 17FPR070E
0.075 13FPR075E 14FPR075E 17FPR075E
0.080 13FPR080E 14FPR080E 17FPR080E
0.090 13FPR090E 14FPR090E 17FPR090E
0.100 13FPR100E 14FPR100E 17FPR100E
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46
14A Series
Alumina Body Current Sense
Series Wattage Ohms
14A 4 0.004-0.051
Terminals Solder-plated copper terminals or copper clad steel depending on ohmic value.
Encapsulation Ceramic cased body
Derating Linearly from 4W@70°C to 0W@250°C
Max.Voltage √(PxR) RMS
Climatic Category 55/200/56
TCR Varies from +150 to +1100ppm/°C based on resistance value. TCR increases
as resistance value reduces from 51 to 4milliohms. TCR is tested as per IEC
Specification 115-1 Clause 4.8.4.2
Tolerance ±1% standard. Others available.
Power rating 4W@70°C
Dielectric withstanding
voltage
1000 VRMS for 3 and 5 watt; 500 VRMS for 2 watt.
Insulation resistance Not less than 1000MΩ.
Thermal EMF Less than ±2µV/°C.
Temperature range -55°C to 275°C.
14AFRCurrentSenseresistorsfeatureahightem-
perature ceramic body which affords the user higher
powerdensitiesthansimilarproductswhichutilize
silicone based epoxy molding compounds. The inter-
nal construction involves a straight, low inductance,
3-piece welded metal element at 1% tolerance. This
series is stocked in 9 popular resistance values for
easy accessibility.
FEATURES
•Idealforcurrentsensingapplications
•1%Tolerancestandard
•Fixedresistancemeasuringpoint
•Lowinductance
•RoHScompliant
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
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PERFORMANCE CHARACTERISTICS
Test Condition Maximum ∆R
Endurance at Rated Power 1000hrs Test ∆R <5%
Terminal Strength Pull Strength of 50N for 10sec, IEC115-1, Clause 4.16 Test Ua1
Solderability 95% Coverage as per MIL STD 202F, Test 208
Resistance to Solder Heat 260°C for 10sec as per IEC115-1, Clause 4.18 ∆R <0.5%
Long Term Damp Heat 90-95% RH @40°C for 56 Days, IEC115-1, Clause 4.24 ∆R <5%
Climatic Sequence As per IEC 115-1, Clause 4.23 ∆R <5%
Overload 5 times rated wattage for 5 seconds
Standard part numbers
Ohmic Part
value Number
0.004 14AFR004E
0.005 14AFR005E
0.008 14AFR008E
0.010 14AFR010E
0.015 14AFR015E
0.022 14AFR022E
0.033 14AFR033E
0.047 14AFR047E
0.051 14AFR051E
14AFR051E
Ohm Value
Example:
R050= 0.05Ω
Tolerance
F= 1%
10 Series
Wattage
A = Alumina
Molded Body RoHS Compliant
14A Series
Alumina Body Current Sense
ORDERING INFORMATION
18mm ±16.40mm ±.5
36mm ±40.80mm ±.05
40mm
Measuring Length
Series Wattage Length Diam. “M” Lead
14A 4 0.709 / 18 0.252 / 6.40 1.575 / 40 0.031/0.80
DIMENSIONS
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48
60 Series
Two Terminal Metal Element
Current Sense
A
C
B
Resistor Nichrome resistive element
Terminals Copper clad steel or copper depending on style. RoHS
solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +275°C
Tolerance ±3% standard, others available
Power rating Based on 25°C ambient
Overload 5x rated power for 5 seconds
Inductance <10nh
To calculate max amps use the formula √(P/R)
01020304050
600
500
400
300
200
100
0
3w
.1 -2w
ppm/ϒC
Resistance (m�)
Te mp. Coefficient of Resistance
TCR as a function of resistance
These non-inductive, 3-piece welded element resis-
tors offer a reliable low-cost alternative to conven-
tional current sense products. With resistance values
as low as 0.005Ω, and wattages from 0.1w to 3w,
the 60 Series offers a wide variety of design choices.
FEATURES
•Lowinductance
•Lowcost
•Wirewoundperformance
•Flameproof
CHARACTERISTICS
ORDERING INFORMATION
(Partiallisting;contactOhmiteforothers)
00 = 1/10
01 = 1/8
02 = 1/5
03 = 1/4
04 = 3/8
05 = 1/2

Series
Wattage
07 = 3/4
10 = 1.0
15 = 1.5
20 = 2.0
30 = 3.0
Tolerance
F=1%
H=3%
J=5%
Ohms
R005 = .005
R010 = .01
R020 = .02
R050 = .05
R100 = 0.10
E = RoHS compliant
Dimensions Lead
Part Number Watts Ohms Tolerance A (ref.) B (max.) C (±0.010) Ga.
600HR050E 0.1 0.05 3% 2.440 0.155 0.655 24
600HR033E 0.1 0.033 3% 2.440 0.155 0.655 24
600HR036E 0.1 0.036 3% 2.440 0.155 0.655 24
601HR027E 0.125 0.027 3% 2.440 0.155 0.655 24
601HR030E 0.125 0.03 3% 2.440 0.155 0.655 24
601HR025E 0.125 0.025 3% 2.440 0.155 0.655 24
602HR050E 0.2 0.05 3% 3.530 0.250 0.559 22
603HR005E 0.25 0.005 3% 2.440 0.155 0.655 24
603HR010E 0.25 0.01 3% 2.440 0.155 0.655 24
603HR015E 0.25 0.015 3% 2.440 0.155 0.655 24
603HR050E 0.25 0.05 3% 3.685 0.330 1.310 20
604HR010E 0.375 0.01 3% 3.530 0.250 0.559 22
604HR020E 0.375 0.02 3% 3.530 0.250 0.559 22
604HR025E 0.375 0.025 3% 3.530 0.250 0.559 22
604HR100E 0.375 0.01 3% 3.587 0.65 1.125 20
605HR010E 0.5 0.01 3% 3.685 0.355 1.310 20
605HR020E 0.5 0.02 3% 3.685 0.330 1.310 20
605HR030E 0.5 0.03 3% 3.685 0.330 1.310 20
605HR100E 0.5 0.1 3% 3.981 0.750 1.675 18
607HR050E 0.75 0.05 3% 3.587 0.630 1.106 20
607HR005E 0.75 0.005 3% 3.674 0.320 1.310 20
610HR005E 1 0.005 3% 3.587 0.650 1.125 20
610HR010E 1 0.01 3% 3.587 0.630 1.106 20
610HR020E 1 0.02 3% 3.587 0.630 1.106 20
610HR030E 1 0.03 3% 3.587 0.650 1.106 20
610HR050E 1 0.05 3% 3.981 0.750 1.675 18
615HR010E 1.5 0.01 3% 3.981 0.750 1.675 18
615HR020E 1.5 0.02 3% 3.981 0.750 1.675 18
615HR030E 1.5 0.03 3% 3.981 0.750 1.675 18
620HR005E 2 0.005 3% 3.981 0.750 1.675 18
630HR010E 3 0.01 3% 4.125 0.781 1.68* 18
630HR015E 3 0.015 3% 4.125 1.11 2 18
630HR025E 3 0.025 3% 4.125 1.279 2.125 18
630HR050E 3 0.05 3% 4.125 1.664 2.375 18 *Referencedimensions;contactOhmitefordetails
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60 Series
Four Terminal Bare Element
Series Wattage Resistance Range (Ω)* Amps max. Tolerance*
610 1W 0.002-0.050 32 1%
650 5W 0.002-0.005 100 1%
*Standard; others available
Terminals Tinned Copper
Resistive element Manganin Alloy
Operating Temperature Range -55˚C to +275˚C.
Temperature Coefficient of Resistance 0˚C to 85˚C: ±50 PPM/˚C, .015Ω and higher;
±100 PPM/˚C, .015Ω and lower
Environmental Performance Exceeds the requirements of MIL-PRF-49465
Power rating Based on 25˚C free air rating
Overload 5 times rated wattage for 5 seconds
Thermal EMF Less than ±3µV/˚C
Derating Linearly from 100% @ +25°C to 0% @ 275°C
1.100" ±.010
0.040" (18AWG)
1.000" ±.010
0.081" (12AWG)
1.400" max.
0.200" ±.015
0.100"
(typ. to bend)
0.200" ±.010
0.100"
(typ. to bend)
0.450"
max.
0.250" ±.010
0.180"
(typ. tinned
surface)
610 Series (1 watt)
650 Series (5 watt)
610FPR050E
60 Series
Wattage
10 = 1.0
50 = 5.0
Tolerance
F=1%
D=0.5%
Ohm Value
Example:
R050= 0.05Ω
Terminals
P = 4 terminals RoHS Compliant
100
Percent Rated Watts
Ambient Temperature, ϒC
60
20
00 175
80
40
25 75 125 225 275
Stdandard part numbers
Ohmic 610 Series 650 Series
value 1 watt 5 watt
0.002 610FPR002E 650FPR002E
0.005 610FPR005E 650FPR005E
0.010 610FPR010E –
0.015 610FPR015E –
0.020 610FPR020E –
0.025 610FPR025E –
0.036 610FPR036E –
0.050 610FPR050E –
Derating
Ohmite’sFourTerminalBareElementResistorsprovide
ultra low resistance values (to 0.0005Ω) for relatively
highcurrentrequirements,withtheadvantagesofa
KelvinconfigurationandPCBoardmountingcapability.
These shunt resistors are specifically designed for low
resistanceapplicationsrequiringthehighestaccuracy
andtemperaturestability.ThisFourTerminalversionof
Ohmite’s 60 Series Resistor is specially designed for use
inaKelvinconfiguration,inwhichacurrentisapplied
through two opposite terminals and sensing voltage is
measured across the other two terminals.
TheKelvinconfigurationenablestheresistanceand
temperature coefficient of the terminals to be effectively
eliminated. The four terminal design also results in a
lower Temperature Coefficient of Resistance and lower
self heating drift which may be experienced on two ter-
minalresistors.Therequirementtoconnecttotheter-
minals at precise test points is eliminated, allowing for
tighter tolerancing on the end application.
FEATURES
• Ideal for current sensing applications
• 1% tolerance standard, others available
• Low inductance (non-inductive below
0.05Ω)
• RoHS compliant
• Radial, self-supporting, design is ideal for
PC board mounting
• High Power-to-size ratio
• Decimal marked, silicone coated (650
Series only)
DIMENSIONS
SERIES SPECIFICATIONS
CHARACTERISTICS
ORDERING INFORMATION
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50
CHARACTERISTICS
Ceramic Core CeramTec Rubalit® 96% alumina
End Caps Stainless steel, precision formed
Leads Copper wire, 100% Sn (Lead Free) coated
Resistance Wire CN49W alloy TC ±20ppm/°C
Encapsulation SUMICON 1100/1200 Epoxy molding compound for IC encapsulation
Standard Tolerance F (1.0%), J (5.0%)
Temperature Coefficient ±300ppm/°C for ≤0.03Ω; ±100ppm/°C for ≥0.033Ω
Maximum Working Voltage √PxR
WL Series
Miniature Wirewound
Current Sense
Type Power Rating (watts) Resistance Range (Ω)
WLA 0.5 0.005-0.100
WLB 1 0.005-0.100
WLC 2 0.010-0.100
Test Conditions Of Test Performance
Thermal Shock Rated power applied until thermal stability, -55°C +0°C,-5°C,15min. ±2.0%
Short-time Overload 5 times rated wattage for 5 seconds ±2.0%
Solderability Method 208 of MIL-STD-202 ±2.0%
Terminal Strength Pull test:10 pounds, 5 to10 seconds, Twist test: 1080°, 5 second/rotation ±1.0%
Dielectric Withstanding Voltage 500 Volts rms for 1W. 1 minute ±1.0%
High Temperature Exposure Exposed to an ambient temperature of 275 +5/-0°C for 250 ±8 hours, ±5.0%
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ±2.0%
Low Temperature Storage Cold chamber at a temperature of -65 ±2°C for 24 ±4 hours ±2.0%
Vibration, High Frequency Frequency varied 10 to 2000Hz, 200G peak, 2 directions 6 hours each ±1.0%
Load Life 1000/2000 hours at rated power, +25°C, 1.5 hours “On”, 0.5 hours “Off” ±5.0%
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
80
40
25 50 100 175750 125 150
FEATURES
•Ultra-lowohmicvalueseriesforCurrentSensing
applications
•Verylowinductance(<1nHat1MHzTest)
•Miniaturizeddimensions,Betterpowertodimen-
sion ratios
•Useofthehighestqualitystandard(96%Alumina)
ceramic core
•Manufacturingprocess–Wirewinding/Spot
Welding–byComputerNumericalControl(CNC)
machine tools to ensure consistency of product
quality.
•Encapsulatedbyepoxymoldingcompound
•AdvancedICencapsulationmold/dietechnologies
Derating
PERFORMANCE DATA
SERIES SPECIFICATIONS
(continued)
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Type Power Rating (watts) L D d
WLA 0.5 5.08 / 0.200 2.54 / 0.100 0.60 / 0.024
WLB 1 7.00 / 0.276 3.30 / 0.130 0.60 / 0.024
WLC 2 11.4 / 0.450 4.57 / 0.180 0.80 / 0.031
LD
0.984 /
25
d


Series Ohms
Power
A = 0.5
B = 1
C = 2
Tolerance
F = 1%
J = 5%
Package
T = Tape
blank = 25pc Pack
RoHS compliant
Standard Part Numbers for WL Series
Wattage: 0.5 1.0 2.0
Series: WLA WLB WLC
Ohms
0.005 WLAR005FE WLBR005FE
0.01 WLAR010FE WLBR010FE WLCR010FE
0.015 WLAR015FE WLBR015FE WLCR015FE
0.02 WLAR020FE WLBR020FE WLCR020FE
0.025 WLAR025FE WLBR025FE WLCR025FE
0.03 WLAR030FE WLBR030FE WLCR030FE
0.05 WLAR050FE WLBR050FE WLCR050FE
0.10 WLAR100FE WLBR100FE WLCR100FE
Key to five-band code
Band 1 2 3 4 5
Color Digit Multiplier Tolerance
Black 0 0 0 x 1Ω
Brown 1 1 1 x 10Ω ± 1% (F)
Red 2 2 2 x 100Ω ± 2% (G)
Orange 3 3 3 x 1KΩ
Yellow 4 4 4 x 10KΩ
Green 5 5 5 x 100KΩ ± 0.5% (D)
Blue 6 6 6 x 1MΩ ± 0.25% (C)
Violet 7 7 7 x 10MΩ ± 0.10% (B)
Grey 8 8 8 ± 0.05%
White 9 9 9 x 0.001Ω
Gold x 0.1Ω ± 5% (J)
Silver x 0.01Ω ± 10% (K)
15234
WL Series
Miniature Wirewound
Current Sense
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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52
SERIES SPECIFICATIONS
A Series
PulsEater® Ceramic Composition
Available in E12 Ohmic values
P Impulse
Resistance1 avg.2 Voltage3 Energy4
Series (ohms) (watts) (volts) (joule)
AV 3.3 to 10K 2.0 1000 250
AW 4.7 to 15K 2.5 1500 400
AX 1.0 to 3.3K 3.5 1000 700
AY 2.2 to 6.8K 4.5 2000 1400
AZ 1.5 to 4.7K 5.5 2500 2800
1E12 Standard Values ±10%; 2Free Air 40°C Ambient; 3In Air; 4Single Impulse
Parameter Max. ∆RTest Method
Life Test +5% MIL-STD-202F, method 108A.
except 50°C, 1000 hrs. @ rated
power; 1.5 hrs. ON, 0.5 hrs. OFF
Single Pulse
Energy
±1.5% Single pulse, capacitor discharge
at Rated Energy; 350VDC for AW
and AX sizes; 650VDC for AY and
AZ sizes.
Repetitive HV
Pulsing
±2.0% 10 joules @ 5.OKV, 10,000 cycles
Short-time
Overload
±1.5% 10x rated power. 5 sec. ON, 5
sec. OFF, 5 cycles
Short-term High
Temp
±1.5% 250°C for 30 seconds
Long-term High
Temp
±2.0% 1000 hours @ 150°C
Thermal Shock
Cycle
±2.0% MIL-STD-202F, method 107D.
-55°C to +125°C, 5 cycles
Moisture
Resistance
±1.0% 90% to 95% rh @ 40°C, 1000 hrs.
Resistance Element Bulk Ceramic
Terminals Radial; 100% Sn solder coated radial (60/40 sol-
der available upon request)
Coating UL94V0, solvent resistant epoxy
Tolerance ±10% Standard
Operating Temp.
Range
-55°C to 150°C
Derating Derates linearly from 100% @ 50°C to 0% @
150°C
Temperature Rise 100°C @ 100% rated power, 50°C ambient
D
L
H
Mounting clip
This saddle clip conforms to
the configuration of Ohmite’s
A Series resistor to provide
secure mounting. Made
of a durable thermoplastic
polyester, the saddle clip is
designed to secure the A
Series in place while safely
withstanding its operat-
ing temperatures. Use (2)
saddle clips per resistor for
extra stability.
Dim. (mm)
Part No. D H L for Series Color
5911E 20 23 13 AXandAY White
5910E 25 26 15 AZ Black
*AZstyleisprovidedwith
dual terminal wires
The“A”Seriesnon-inductive,ceramiccomposite
resistors are designed for a variety of applications
where high energy handling capabilities are crucial.
These resistors are ideal for any application which
is subject to surges, high peak power, or impulse
energy.
Theiruniquedesignallowsuniformdistribution
of energy throughout their structure which results
in low thermal stress. The high-temperature,
solvent-resistantepoxycoatingcarriesaUL94V0
flammability rating which is suitable for almost any
environment.
APPLICATIONS
•MotorDrives
•PowerSupplies,UPS
•PowerConversion
•In-RushCurrentLimiting
FEATURES
•HighSurgeEnergy
•Non-Inductive
•SmallSize
CHARACTERITICS
(continued)
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DIMENSIONS
ORDERING INFORMATION
Standard Values
Ohmic value
AW–––
AX–––
AV–––
AY–––
AZ–––
Series
Part No.
Prefix
Suffix
Ohmic value
AW–––
AX–––
AV–––
AY–––
AZ–––
Series
Part No.
Prefix
Suffix
Ohmic value
AW–––
AX–––
AV–––
AY–––
AZ–––
Series
Part No.
Prefix
Suffix
Ohmic value
AW–––
AX–––
AV–––
AY–––
AZ–––
Series
Part No.
Prefix
Suffix
1.0 –––10GK
1.2 –––12GK
1.5 –––15GK
1.8 –––18GK
2.2 –––22GK
2.7 –––27GK
3.3 –––33GK
3.9 –––39GK
4.7 –––47GK
5.6 –––56GK
6.8 –––68GK
8.2 –––82GK
10 –––100K
12 –––120K
15 –––150K
18 –––180K
22 –––220K
27 –––270K
33 –––330K
39 –––390K
47 –––470K
56 –––560K
68 –––680K
82 –––820K
100 –––101K
120 –––121K
150 –––151K
180 –––181K
220 –––221K
270 –––271K
330 –––331K
470 –––471K
560 –––561K
680 –––681K
820 –––821K
1000 –––102K
=StandardvaluesNon-standard values subject to a minimum handling charge per item.
Check product availability at www.ohmite.com
AW56GKE
Ohm Value
Example:
33G = 3.3 Ohms
330 = 33 Ohms
331 = 330 Ohms
Tolerance
K=10% std.
M = 20%
Size
RoHS compliant
P L D H S Term. wire
avg.2 max. max. max. norm. gauge Weight
Series (watts) (mm) (mm) (mm) (mm) (AWG) (g)
AV 2.0 15 13 22 12.5 20 3.9
AW 2.5 20 13 19 17.5 20 5.4
AX 3.5 15 21 26 12.5 18 10
AY 4.5 25 21 26 22.5 18 19
AZ 5.5 30 26 27 18 33
L
S
DH
7.6mm
AV - AY AZ
4.7mm
Offset crimp width is
2x terminal wire gauge
16.7m
m
L
S
D
AZ series also available
with crimps upon request
A Series
PulsEater® Ceramic Composition
Available in E12 Ohmic values
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54
EY Series
Ceramic Composition
10% Tolerance
Series Watts max.* Resistance range Tolerance Joules max.** Max. working volts
EY 2.5 10Ω - 390KΩ ±10% 400 550
* at 25°C. **For a single impulse.
Test Condition Requirement ∆R ±( +0.05Ω)
Resistance Measurement
Resistance voltage
3.3Ω~8.2Ω 0.3V 25°C
10Ω~82Ω 1.0V
100Ω~390kΩ 3.0V
Within regulated to tolerance
TCR +25°C/-40°C and +25°C/+125°C <100Ω: -900+/- 300ppm
≥100Ω: -1200+/-300ppm
Voltage Coefficient Rated voltage and rated voltage
x 10% (Apply for over 1kΩ)
0~-0.05%/V
Overload Rated voltage x 2.5 or maximum
overload voltage for 5s, which-
ever less
±2% limit; 0.4% typical
Single impulse
rating
The resistor mounted to the test
circuit at right. Single impulse
test of 10 ohm resistor resulting
in 3.3ms.
±5%
Resistance to sol-
dering heat
350°C±10°C, 3.5s±0.5s ±2% limit; 0.8% typical
Rapid change of
temperature
-40°C(30min.)/+85°C(30min.), 5
cycles
±2% limit; 0.4% typical
Moisture resis-
tance
40°C±2°C, 90%~95%RH,
1000h, 1.5h ON/0, 5h OFF
cycles
±5% limit; 0.6% typical
Load life 40°C±2°C, 1000h, 1.5h ON/0, 5h
OFF cycles
±5% limit; 0.4% typical
Resistance to
Solvent
Dipping in IPA or Xylene for 3
minutes and leaving for 10 min-
utes after removing drops,
then brushing 10 times.
No abnormality in
appearance. Marking
shall be easily legible.
Pulse Tolerance 200V, 112 Joules, 10000 cycles,
5600uf capacitor discharge, 26
second rest time
±2%
FEATURES
•Suitableforautomaticmachineinsertion
•Idealforhighenergy/highpeakpowerapplications
•Productswithlead-freeterminationsmeetEU
RoHSrequirements
•Higherreliabilityagainstdisconnectioncompared
to wirewound resistors and film resistors
Power Rating Based on 25°C free air rating
TCR -900±300: R<100Ω
-1200±300: R≥100Ω
Voltage Abs. max. working: 550V
Abs. max. overload: 1100V
Abs. max. pulse: 25kV
Operating
Temp. Range
-40°C to +110°C
Tolerance ±10% standard
SERIES SPECIFICATIONS
CHARACTERITICS
C=3300uF
Protection
resistor
DC
500 volts
Rx
100
Percent Rated Power
Ambient Temperature, °C
60
20
0
80
40
0 20
25°
60 110°40-40 -20 80
Derating
(continued)
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Tape and Reel Dimensions
EY Series
Ceramic Composition
10% Tolerance
ORDERING INFORMATION
DIMENSIONS
in./mm
1.86" max.
(46.2mm) 1.34" min.
(34mm)
0.039" nom.
(1.0)
0.37" ±.03
(9.4mm ±.4)
D
3mm max.
ref.
Standard values
EY100KE
EY150KE
EY180KE
EY270KE
EY330KE
EY470KE
EY680KE
EY101KE
EY151KE
EY271KE
EY471KE
EY681KE
EY102KE
EY152KE
EY272KE
EY472KE
EY103KE
EY153KE
EY473KE
EY104KE
0.125" min. 0.031" max.
0.591"
15mm
4.33"
110mm
14"
2.900"
Ohm Value
Example:
100 = 10Ω
101 = 100Ω
102 = 1,000Ω
Tolerance
K= 10% Standard
Series
RoHS Compliant
Packaging
TR = tape & reel
B = bulk
EY101KE-TR
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56
OX/OY Series
Ceramic Composition
10% Tolerance
Series Watts max.* Resistance range Joules max.** Max. working volts
OX 1 3.3Ω-100K 50 300
OY 2 3.3Ω-1M 80 400
* at 70°C. **For a single impulse.
Test Condition Maximum ∆R
Life Test MIL-STD-202, Method 108 ±5%
Short Time Overload 2x rated V, 5 sec ON @ 70°C ±(2% +0.05Ω)
Resistance to Pulse120,000 cycles. See circuit for test
conditions
±5%
Thermal Shock MIL-STD-202, Method 107 ±(2% ±0.05Ω)
Moisture Resistance 1000 hrs @ 40°C,
90 - 95% RH
±5%
Resistance to Pulse
�R/R
Cycles
0.60%
0.20%
0.00% 100 10,0000 1,000 20,000
0.40%
10 Kohms
1 Kohm
100 ohms
0.80%
�R/R
Cycles
0.60%
0.20%
0.00% 100 10,0000 1,000 20,000
0.40%
10 Kohms
1 Kohm
100 ohms
0.80% DC 20KV
see circuit for
test conditions
OX Series
OY Series
DC 14KV
see circuit for
test conditions
TheOX/OYSeriesoffixed
ceramic resistors are ideal for
circuitry associated with surges,
high peak power or high energy.
They offer enhanced perfor-
mance in high voltage power
supplies, R-C snubber circuits,
andinrushlimiters.TheOX/
OYresistorscanoftenreplace
carbon composition resistors
which can be difficult to source.
FEATURES
•Replaces1and2watt
carbon composition
resistors
•Meetshighenergy
density demands
•Highpeakpower
•10%Tolerance
Terminals Pb-free solder-coated axial
Coating Silicone ceramic
Derating Linear from 100% @ +70°C to
0% @ +200°C
Operating Temp.
Range
-40°C to +220°C
Tolerance ±10% standard
Power Rating Based on 70°C free air rating
Temperature
Coefficient
-1300 ±300ppm/°C.
SERIES SPECIFICATIONS
CHARACTERITICS
OX OY
Max Working Voltage 300V 400V
Dielectric Strength 500V 700V
Max Overload Voltage 600V 800V
Max Pulse Voltage114KV 20KV
Pulse Tolerance,
100 pulses
1240V @ 52µF,
40J/ 35 sec.
1640V @ 52µF,
70J/35 sec.
1See figures
1000 pF R.U.T.
Max. Pulse
Voltage
10 kohm
1 sec. on / 1 sec. off
14KV and 20KV val-
ues used in circuit as
shown; full voltage
not applied directly to
resistor.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 57
Ohm Value
Example:
33G = 3.3 Ohms
330 = 33 Ohms
331 = 330 Ohms
Tolerance
K= 10% Standard
Size
OX =1W
OY =2W
RoHS Compliant
Packaging
TR = tape & reel
B = bulk
OX82GKE-TR
*approx. 27mm for
taped & reeled units
LD
1.50" ±.118
38.0mm ±3* 0.031" nom.
(0.8mm)
C
3"
13"
ø 1.13"
2.88"
6.2mm ±.5
63mm ±1
2.5mm
max.
L1L2
L1 – L2 = 1mm max.
0.80mm
max.
10.16mm ±.80
Tape and Reel Dimensions
Length L Length C Diameter D Qty. per
Series ±.039 (±1.0) max. ±.039 (±1.0) reel
OX 0.65 / 16.5 0.748 / 19.0 0.217 / 5.5 1000
OY 0.748 / 19.0 0.886 / 22.5 0.276 / 7.0 500
OX/OY Series
Ceramic Composition
10% Tolerance
ORDERING INFORMATION
DIMENSIONS
in./mm
Standard part numbers for OX/OY Series
3.3 ––33GKE
3.9 ––39GKE
4.7 ––47GKE
5.6 ––56GKE
6.8 ––68GKE
8.2 ––82GKE
10 ––100KE
12 ––120KE
15 ––150KE
18 ––180KE
22 ––220KE
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
Ohmic value
OX– 1
OY– 2
Wattage
Part No.
Prefix
Suffix
27 ––270KE
33 ––330KE
39 ––390KE
47 ––470KE
56 ––560KE
68 ––680KE
82 ––820KE
100 ––101KE
120 ––121KE
150 ––151KE
180 ––181KE
220 ––221KE
270 ––271KE
330 ––331KE
390 ––391KE
470 ––471KE
560 ––561KE
680 ––681KE
820 ––821KE
1000 ––102KE
1200 ––122KE
1500 ––152KE
1800 ––182KE
2200 ––222KE
2700 ––272KE
3300 ––332KE
3900 ––392KE
4700 ––472KE
5600 ––562KE
6800 ––682KE
8200 ––822KE
10000 ––103KE
12000 ––123KE
15000 ––153KE
18000 ––183KE
22000 ––223KE
27000 ––273KE
33000 ––333KE
39000 ––393KE
47000 ––473KE
56000 ––563KE
68000 ––683KE
82000 ––823KE
100000 ––104KE
120000 ––124KE
150000 ––154KE
180000 ––184KE
220000 ––224KE
270000 ––274KE
330000 ––334KE
390000 ––394KE
470000 ––474KE
560000 ––564KE
680000 ––684KE
820000 ––824KE
1MEG ––105KE
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58
CHARACTERISTICS
Resistive Element Thick Film
Encapsulation Screen Printed Glass
Resistance Value 100Ω up to 100KΩ
Temperature Coefficient 100ppm/°C
Tolerance 1%, 2%, 5%, 10%
Operating Temperature -55°C to +200°C
Test VDE 0750 (Pulse Duration 10 msec)
TFS Series
Surge Capable
Thick Film Non Inductive
Type U (KV) Energy* (J) Power (W)
TFSA 3 6 0.5
TFSB 3.5 9 0.5
TFSC 4 11 0.75
TFSD 7 33 1
TFSE 7 44 1.5
TFSF 11 55 2
*Published energy rating is for 10ms pulse. For shorter pulses energy rat-
ing has to be derated according to Max. Individual Pulse Rating chart and
Single Pulse Energy Rating considerations.
FEATURES
•Appropriateformedicalsurgeprotec-
tion applications
•Idealtoreplacestandardcarboncom-
position resistors
•Customdimensions,values,toler-
ances and characteristics available
Notes
• Momentary overload capability is 5 times rated power for 1 second or 2 times
rated power for 5 seconds. Always verify designs with pulse and surge condi-
tions through thorough testing of the design at maximum operating tempera-
ture and maximum pulse loading (or some margin above maximum pulse
loading).
• Damage to the resistor by excessive pulse loading is generally indicated by an
increasing resistance of the resistor.
• Energy ratings are based on single pulses (at least 1 minute between pulses).
• For multiple pulse applications the energy pulse rating should be reduced and
the average power should not exceed the nominal power rating of the selected
model.
• See Single Pulse Energy section for more information
TheTFSSerieshasbeenspecificallydevelopedtoabsorblarge
amountsofenergybyefficientuseofitscompactmass.Ideal
for medical surge protection applications, these thick film resis-
tors offer non-inductive performance in an axial package.
Usesincludepowersupplyconversion,electronmicroscopes,
X-raysystems,high-resolutionCRTdisplays,andgeophysical
instrument related products.
SERIES SPECIFICATIONS
AC
B
HE
0.50mm
0.25mm
Type Watts A B C H E
TFSA 0.5 9 5.5 10 0.7 1.1
TFSB 0.5 11 5.5 10 0.7 1.1
TFSC 0.75 13 5.5 10 0.7 1.1
TFSD 1 21 8 10 0.9 1.3
TFSE 1.5 21 10.5 10 0.9 1.3
TFSF 2 26 10.5 10 0.9 1.3
DIMENSIONS
mm
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 59
Although Ohmite’s TFS Series resistors have been specially designed
and developed to absorb much more energy than standard resistors,
pulses and transients require special consideration since they cause an
instantaneous temperature rise in the resistor film. This application note
can guide you through these considerations.
For applications with transients, pulses
or surges the following must be consid-
ered:
1. Do not exceed the normal rated oper-
ating voltage of the device.
2. Using the figure at right, estimate the
energy (Ea) and the pulse duration
(ta) for a single pulse in your applica-
tion.
3. Calculate the energy ratio in percent
(Er) between the nominal energy rat-
ing of the model you have chosen
(see table) and the single pulse
energy in your application (Ea from
step 2) using the formula:
E
a
Er = –––––––– x 100
Enominal
4. Refer to the Pulse Chart. On this
chart find the point where the energy
ratio (Er), found at step 3, and time
(ta) coincide. Qualify that this point
falls below the maximum pulse
energy curve. If the point is above
the curve a bigger model should be
chosen.
V
t
V
t
V
t
V
t
E = –––
V2t
R
E = –––
V2t
3R
E = –––
V2t
3R
E= Energy (joules)
t=Time (seconds)
V= Voltage (volts)
R= Resistance (ohms)
C= Capacitance (farads)
E = –CV2
1
2
t = RC
Example
A 1µF capacitor is charged to
3.5kV and model TFSC, 1KOhm
has been selected. Model TFSC
is rated for 4kV, so the peak volt-
age of 3.5kV is acceptable.
1
Ea = –– CV2 = 6.1J
2
ta = R C = 1 ms
6.1J
Er = ––– x 100 = 55%
11J
According to the pulse chart, an
energy ratio of 55% for a pulse
width of 1ms falls well above the
energy curve. The limit is actually
located around 25-30%. Model
TFSC cannot be used for this
application.
A bigger model should be chosen,
for example TFSD. Model TFSD,
1KOhm, can be used for this
application because we have an
energy ratio Er of 18%, which is
below the energy curve.
6.1J
Er = ––– x 100 = 18%
33J
Ohm Value
Example:
100R = 100Ω
2K40 = 2400Ω
Tolerance
F = 1%
G = 2%
J = 5%
K = 10%
Series
TFSA100KJE
Energy Rating
joules
A= 6
B= 9
C= 11
RoHS Compliant
D= 33
E= 44
F=55
Standard Part Numbers for TFS Series
6 Joules 9 Joules 11 Joules 33 Joules 44 Joules 55 Joules
Ohms Tol. 0.5 Watts 0.5 Watts 0.75 Watts 1 Watts 1.5 Watts 2 Watts
100 1% TFSA100RFE
100 5% TFSB100RJE TFSD100RJE TFSF100RJE
220 1% TFSA220RFE
270 5% TFSA270RJE TFSC270RJE TFSD270RJE TFSF270RJE
470 1% TFSA470RFE
470 5% TFSB470RJE TFSE470RJE
680 5% TFSA680RJE TFSC680RJE TFSE680RJE TFSF680RJE
750 5% TFSB750RJE TFSD750RJE TFSF750RJE
1,000 1% TFSA1K00FE
1,000 5% TFSA1K00JE TFSB1K00JE TFSC1K00JE TFSD1K00JE TFSE1K00JE TFSF1K00JE
1,500 5% TFSA1K50JE TFSC1K50JE TFSD1K50JE TFSF1K50JE
2,200 1% TFSA2K20FE
2,700 5% TFSB2K70JE TFSE2K70JE
4,700 1% TFSA4K70FE
4,700 5% TFSA4K70JE TFSC4K70JE TFSD4K70JE
4,990 1% TFSA4K99FE
5,000 5% TFSA75K0JE
6,800 5% TFSB6K80JE TFSE6K80JE
10,000 1% TFSA10K0FE
10,000 5% TFSA10K0JE TFSB10K0JE TFSC10K0JE TFSD10K0JE TFSF10K0JE
16,000 5% TFSF16K0JE
20,000 1% TFSA20K0FE TFSF20K0JE
20,000 5% TFSB20K0JE TFSD20K0JE
22,000 1% TFSA22K0FE
27,000 5% TFSA27K0JE TFSC27K0JE TFSE27K0JE
47,000 1% TFSA47K0FE
50,000 5% TFSA50K0JE TFSF51K0JE
51,000 5% TFSB51K0JE TFSC51K0JE TFSD51K0JE
75,000 5% TFSE75K0JE
100,000 1% TFSA100KFE
100,000 5% TFSB100KJE TFSC100KJE TFSD100KJE TFSF100KJE
TFS Series
Surge Capable
Thick Film Non Inductive
SINGLE PULSE ENERGY RATING
ORDERING INFORMATION
Maximum Individual Pulse Rating
Energy Rating %
Pulse Width
1µs 10µs 100µs 1 ms 10 ms 100 ms
0.1
1000
1
10
100
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60
0.020"
0.51mm
typ.
0.150"
3.8 mm
min.
0.200" / 5.08 mm
0.075" / 1.91 mm dia. finished pins
0.070" /
1.78 mm
0.040" / 1.02 mm
0.240" /
6.10 mm
0.300" /
7.62 mm
0.040" /
1.02 mm
typ.
0.800"
20.32mm
1.085"/27.56mm
1.07"/27.18mm
TP Series
High Energy
Thick Film on Alumina Substrate
Substrate Alumina
Resistor Thick Film
Coating Glass
Terminals Solder Plated Phosphor Bronze
Thermal Conductivity 20 Watts/Meter/°C
Temperature Coefficient 1 to 100Ω: 100 ppm/°C
101Ω and up: 50 ppm/°C
Tolerance ±1%, ±5% and ±10%
Power Rating Based on 25°C free air
Resistance Range 10 ohms to 1M ohm. Consult factory for other values
Maximum Operating Voltage 350 VAC, 500 VDC through glass
Energy Rating 100J: 100ms pulse with 100uF capacitor, not to exceed 1500 volts
Derating 100% @ 25°C to 0% @ 180°C ambient.
CHARACTERISTICS
FEATURES
•High-TempTerminal
Construction
•WideResistanceRange
•LowInductance(50nH-
100nH)
•HighPowerDensity
•Easytoinstall.
PC-mountable
V
t
E= Energy (joules)
t=Time (seconds)
V= Voltage (volts)
R= Resistance (ohms)
C= Capacitance (farads)
E = –CV2
1
2
t = RC
Pulse
TP Series high energy resistors offer the user the
benefits of non-inductive performance and high
power density. As an added feature, they provide
the impulse energy capability normally associated
withwirewoundorcompositionresistors.Double-
sided screen printing of pulse-tolerant thick film ink,
coupled with a sophisticated scan-cut laser trimming
process,maximizetheenergywithstandingcapabili-
ties of the TP Series.
Standard part numbers for TP series
TP810PW10R0JE
TP810PW20R0JE
TP810PW50R0JE
TP810PW100RJE
TP810PW470RJE
TP810PW1K00JE
TP810PW4K70JE
TP810PW10K0JE
DIMENSIONS
(±.020 in. / ±.508mm)
ORDERING INFORMATION
Power Rating
10 = 10 watts
TP810PW4K50JE
Series
Tolerance
K = 10%
J = 5%
Package
PW = wraparound
terminal
Resistance Value (Ω)
10R0 = 10.0
2K00 = 2,000
45K0 = 45,000
Pin spacing
8 = 0.80"
RoHS
compliant
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 61
DIMENSIONS
SERIES SPECIFICATIONS
High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
OhmiteManufacturing’sfamilyofHighEnergy
Wirewound Resistors employ special winding tech-
niquestomaximizetheeffectivejouleratingofeach
resistor. Most wirewound resistors are wound with
the objective of meeting the stated power (watt-
age) rating and keeping cost low through the use
ofautomaticwindingequipment.Typically,manu-
facturers will allow substitution of resistance wire,
depending on material availability. On tight tolerance
wirewounds some type of abrasive adjustment to the
resistancewireisoftenusedtomaximizeproduction
yields. Both of these procedures can adversely affect
the joule rating and fusing current of a wirewound
resistor, and this is often the reason that the manu-
facturer does not publish a fixed joule rating.
OhmiteHighEnergyWirewoundsarehandwound
in order to maintain the tightest possible pitch
(spacebetweenwindings)andtherebymaximizethe
mass of the resistive element. Since no wire sub-
stitutions are allowed, and no abrasive adjusting is
permitted in this family, Ohmite can publish a fixed
joule rating and fusing current for each part number
in the series.
Thistechniquecanbeappliedtoanywirewound
product.Inordertoprovidethebroadestselectionof
packaging, Ohmite has developed standard offerings
inthreedifferentpackagetypes-axial,SMD,andheat
sinkable.Othersizesandtypescanbequotedon
request,suchastubularpowerresistors.
Series Type Watts Tolerance Voltage
33Jxxx Axial 3 5% 200
35Jxxx Axial 5 5% 460
30Jxxx Axial 10 5% 1000
825JxxxH Heat Sinkable 25 5% 520
RH3R0DBxxxJ Surface Mount 3 5% 200
1.5 / 38.1
33J: 0.593 / 15.1
35J: 1.000 / 25.4
30J: 1.900 / 46.8 33J: 0.218 / 5.5
35J: 0.343 / 8.7
30J: 0.406 / 10.3
33J: 20 ga.
35J: 18 ga.
30J: 18 ga.
RH3R0DBxxxJ: 0.612 / 15.545 0.273 / 6.934
0.226 / 5.740
825JxxxH: 1.938 / 49.23
1.080 / 27.43
0.546 / 13.87
in. / mm
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62
PERFORMANCE CHARACTERISICS
Energy (J)
0
33J1R0
33J5R0
33J10R
33J15R
33J20R
33J25R
33J30R
33J50R
33J100
35J1R5
35J2R5
35J7R5
35J12R
35J18R
35J22R
35J36R
35J47R
35J75R
30J2R0
30J4R7
30J6R8
30J15R
30J27R
30J33R
30J50R
30J82R
30J100
30J150
20
40
60
80
100
120
140
160
180
Fusing Energy (J)
0
33J1R0
33J5R0
33J10R
33J15R
33J20R
33J25R
33J30R
33J50R
33J100
35J1R5
35J2R5
35J7R5
35J12R
35J18R
35J22R
35J36R
35J47R
35J75R
30J2R0
30J4R7
30J6R8
30J15R
30J27R
30J33R
30J50R
30J82R
30J100
30J150
100
200
300
400
500
600
700
Fusing Current (A)
0
33J1R0
33J5R0
33J10R
33J15R
33J20R
33J25R
33J30R
33J50R
33J100
35J1R5
35J2R5
35J7R5
35J12R
35J18R
35J22R
35J36R
35J47R
35J75R
30J2R0
30J4R7
30J6R8
30J15R
30J27R
30J33R
30J50R
30J82R
30J100
30J150
10
20
30
40
50
Energy (J)
0
-1R0H
-5R0H
-10RH
-25RH
-36RH
-47RH
-75RH
-100H
-150H
Fusing Energy (J)
825J-
Energy (J)
0
-R500J
-1R00J
-2R70J
-4R70J
-6R80J
-7R50J
-10R0J
-15R0J
-25R0J
-47R0J
-68R0J
-75R0J
RH3R0DB-
0
-1R0H
-5R0H
-10RH
-25RH
-36RH
-47RH
-75RH
-100H
-150H
825J-
Fusing Energy (J)
0
-R500J
-1R00J
-2R70J
-4R70J
-6R80J
-7R50J
-10R0J
-15R0J
-25R0J
-47R0J
-68R0J
-75R0J
RH3R0DB-
Fusing Current (A)
0
-1R0H
-5R0H
-10RH
-25RH
-36RH
-47RH
-75RH
-100H
-150H
825J-
Fusing Current (A)
0
-R500J
-1R00J
-2R70J
-4R70J
-6R80J
-7R50J
-10R0J
-15R0J
-25R0J
-47R0J
-68R0J
-75R0J
RH3R0DB-
10
20
30
40
50
60
50
100
150
200
250
5
10
15
20
25
30
35
40
45
2
4
6
8
10
12
14
0
10
20
30
40
50
60
5
10
15
20
25
30
35
High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
(continued)
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Standard Part Numbers
Energy Fusing Current Power to
Part Number Ohms Power (J) Energy (J) to fuse (A) fuse (W)
33J1R0 1 3 12.70 53.26 23.93 572.60
33J5R0 5 3 6.25 26.20 10.03 502.96
33J10R 10 3 4.94 20.73 7.08 501.70
33J15R 15 3 4.66 19.55 5.95 531.47
33J20R 20 3 3.91 16.40 5.00 500.45
33J25R 25 3 3.07 12.89 4.20 441.79
33J30R 30 3 2.97 12.46 3.92 460.80
33J50R 50 3 2.43 10.20 2.97 440.68
33J100 100 3 1.92 8.07 2.10 439.58
35J1R5 1.5 5 76.55 321.19 40.32 2438.48
35J2R5 2.5 5 64.65 271.23 31.59 2494.75
35J7R5 7.5 5 37.66 158.01 16.90 2141.89
35J12R 12 5 37.90 158.99 14.20 2420.25
35J18R 18 5 28.80 120.84 11.13 2228.50
35J22R 22 5 27.48 115.29 10.03 2213.02
35J36R 36 5 22.78 95.59 7.86 2222.93
35J47R 47 5 23.22 97.42 7.08 2358.00
35J75R 75 5 18.77 78.77 5.55 2309.77
30J2R0 2 10 162.30 680.93 47.98 4603.79
30J4R7 4.7 10 150.86 632.92 33.88 5395.94
30J6R8 6.8 10 137.27 575.91 28.47 5513.41
30J15R 15 10 119.76 502.47 20.11 6065.77
30J27R 27 10 85.27 357.74 14.20 5445.56
30J33R 33 10 65.54 274.98 11.93 4700.40
30J50R 50 10 62.45 262.03 10.03 5029.59
30J82R 82 10 51.90 217.74 7.86 5063.34
30J100 100 10 49.41 207.28 7.08 5017.03
30J150 150 10 46.61 195.54 5.95 5314.71
825J1R0H 1 25 51.04 214.12 40.32 1625.65
825J5R0H 5 25 39.92 167.49 20.11 2021.92
825J10RH 10 25 31.58 132.50 14.20 2016.87
825J25RH 25 25 19.64 82.40 8.43 1776.01
825J36RH 36 25 17.79 74.62 7.08 1806.13
825J47RH 47 25 18.71 78.49 6.60 2049.57
825J75RH 75 25 14.66 61.49 5.00 1876.69
825J100H 100 25 12.29 51.56 4.20 1767.15
825J150H 150 25 11.59 48.64 3.53 1872.00
RH3R0DBR500J 0.5 3 12.93 54.25 31.59 498.95
RH3R0DB1R00J 1 3 10.23 42.91 22.31 497.70
RH3R0DB2R70J 2.7 3 6.87 28.82 13.24 473.33
RH3R0DB4R70J 4.7 3 5.87 24.63 10.03 472.78
RH3R0DB6R80J 6.8 3 5.34 22.41 8.43 483.07
RH3R0DB7R50J 7.5 3 4.75 19.91 7.86 463.11
RH3R0DB10R0J 10 3 3.98 16.70 6.60 436.08
RH3R0DB15R0J 15 3 3.75 15.75 5.55 461.95
RH3R0DB25R0J 25 3 3.07 12.89 4.20 441.79
RH3R0DB47R0J 47 3 2.28 9.59 2.97 414.24
RH3R0DB68R0J 68 3 2.08 8.72 2.49 423.26
RH3R0DB75R0J 75 3 2.29 9.62 2.49 466.83
RoHS compliant product available; Add “E” suffix to part number to specify.
ORDERING INFORMATION
High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
Other values available, contact Ohmite for details.
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64
G Series
Capacitor Discharge & Symmetry
Series Wattage @25°C Wattage @70°C Limiting Voltage Critical Value Ohmic Range
GW10 10 8.5 685 47KΩ 1Ω-82K
GW13 13 11 940 68KΩ 1Ω-120K
PERFORMANCE DATA
Endurance at
Rated Temperature
Full Rated Power for 1000hrs, (1.5hrs
ON,0.5hrs OFF) at 25°C
∆R < 5% + 0R05
Short Term
Overload
10 x Rated Power for 5 secs, IEC115-1,
Clause 4.1.3
∆R < 2% + 0R05
Damp Heat 90-95% RH, 40°C, 56 Days, ∆R < 5% + 0R05
Steady State IEC 115-1, Clause 4.17.3
Climatic Sequence As per IEC 115-1,Clause 4.23 ∆R < 5% + 0R05
Solderability Not Applicable-Resistor is Designed for
Screw Mounting Only
Terminal Strength 25 N Pull Test for 10 Seconds, IEC
115-1, Clause 4.16
∆R < 0.5% + 0R05
FEATURES
•HighPowerDissipationupto13W@25°C
•SpeciallyDesignedtomeetRepetitivePulse
Loading
•CorrosionResistantTerminalsforlonglife
•SuperiorVibrationResistance
•IEC115-1ReferenceStandard
SERIES SPECIFICATIONS
DIMENSIONS
CHARACTERISTICS
Temperature Range -55°C to 200°C
Terminal Strength >25N
Derating 25°C to 350°C, Linearly
TCR ±100 ppm/°C
Tolerance 1%, ±2%, ±5%, ±10%
Length P
Series (in. ±.039 / mm±1)
GW10 0.866 / 22.0
GW13 1.252 / 31.8
P
0.0157 in. ±.0019
0.40 mm ±.05
0.590 in. ±.039
15 mm ±1
ø 0.25 in. ±.008
6.35 mm ±.20
0.21 in. ±.008
5.35 mm ±.20
0.827 in. ±.039
21 mm ±1
0.374 in. ±.039
9.5 mm ±1
(continued)
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Standard part numbers
Ohms 10 watt 13 watt
1K GW10J1K00E GW13J1K00E
2.5K GW10J2K50E GW13J2K50E
5K GW10J5K00E GW13J5K00E
7.5K GW10J7K50E GW13J7K50E
10K GW10J10K0E GW13J10K0E
15K GW10J15K0E GW13J15K0E
20K GW10J20K0E GW13J20K0E
25K GW10J25K0E GW13J25K0E
40K GW10J40K0E GW13J40K0E
50K GW10J50K0E GW13J50K0E
75K GW10J75K0E GW13J75K0E
BHC
GW10 Case GW13 Case
Series Sizes Series Sizes
ALS30/31 KE, KF ALS30/31 ND, NF,
NP, NT,
RD, RH,
RP
Cornell Dubilier
GW10 Case GW13 Case
Series Sizes Series Sizes
3186 EA, EB, EC, 3186 GC, GD, GE,
ED, EE, EF, GF, GG, GH,
EG, EH GJ, DN
3188 EA, EB, EC, 3188 GC, GD, GE,
ED, EE, EF, GF, GG, GH,
EG, EH GJ, DN
520C BA, BH, BB, 520C DB, DJ, DC,
BJ, BC, BD, DD, DE, DF,
BE, BF DP, DN, DG,
FC, FD, FE,
FF, FP, FN,
FG
DCMC BA, BH, BB, DCMC DB, DJ, DC,
BJ, BC, BD, DD, DE, DF,
BE, BF DP, DN, DG,
FC, FD, FE,
FF, FP, FN,
FG
OTB All
MPF All
PF BA, BH, BB,
BJ, BC, BD,
BE, BF
SCR A
SF All
T A
Epcos
GW10 Case GW13 Case
Series Sizes Series Sizes
B41456 51.6 B41456 76.9
B41458 51.6 B41458 76.9
B43456 51.6 B43456 76.9, 91
B43458 51.6 B43458 76.9, 91
ILL Capacitor
GW10 Case GW13 Case
Series Sizes Series Sizes
LKP 51 LKP 77, 90
LRP 51
Nichicon UK
GW10 Case GW13 Case
Series Sizes Series Sizes
NR 51 NR 76.2, 90
NT 51 NT 76.2, 90
NW 51 NW 76.2, 90
NX 51 NX 76.2, 90
QR 51 QR 76.2, 90
G Series
Component Modifier
W = wirewound Wattage
10 watts
13 watts
Resistance Value
R = Decimal
K = 1,000
Tolerance
K = 10%
J= 5%
G = 2%
F = 1%
Examples:
1K00 = 1,000Ω
10K0 = 10,000Ω
82K0 = 82,000Ω
120K = 120,000Ω
GW10J5K00E E = RoHS
compliant
G Series
Capacitor Discharge & Symmetry
ORDERING INFORMATION
COMPATIBILITY
Panasonic
GW10 Case GW13 Case
Series Sizes Series Sizes
G FB, FC, G HG, HH,
FE, FG, HK, HL,
FH, FK, HN, HP,
FL, FN, HW
FP
United Chemi-Con
GW10 Case GW13 Case
Series Sizes Series Sizes
KMH 50 LXA 76, 89
LXA 50 LXR 76, 89
RWE 50 KMH 76, 89
RWF 50 RWE 76, 89
RWY 50 RWF 76, 89
SME 50 RWL 76, 89
RWY 76, 89
SME 76, 89
UTOR 76
Vishay
GW10 Case GW13 Case
Series Sizes Series Sizes
36D, BY, BA, 36D, DB, DJ,
36DE, BM, BB, 36DE, DC, DD,
36DX BL, BC, 36DX DE, DF
BD, BE,
BF
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66
FEATURES
•RoHScompliant
•Wideresistanceranges
•Epoxycoating
•Metaloxideresistive
element
Mini-Mox
0.25 Watt and 0.5 Watt
Precision Thick Film Axial Terminal
High Voltage/High Resistance
Ohmite Resistance Power Voltage Available
Series Range (Ohms) @25°C Rating Tolerances*
MOX200 500K to 1,500M 0.25W 500V 0.1% to 20%
MOX300 500K to 2,500M 0.50W 1,000V 0.1% to 20%
*Some tolerances are not available over the entire resistance range.
Characteristic Test Method Specification
Short time
overload
Rated Power x2.5, 5 sec. ±0.5% max.
Resistance to
soldering heat
260°C ±5°C, 10 ±1 sec. ±0.5% max.
Temperature
cycling
-55°C/+155°C, 5 cycles ±0.5% max.
Withstanding
voltage
500 VDC, 60 ±10 sec. ±0.5% max.
Insulation
resistance
500 VDC 10,000MΩ or
more
Moisture
resistance
40°C ±2°C, 90-95%RH,
1000 hr.
±1.5% max.
Load life 70°C ±3°C, 1000 hr. ±2% max.
Derating
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00
80
40
155°
25 75 125 175-25-75
70°-55°
The Mini-Mox resistor is very versatile,
covering a wide resistance range as well
as a wide range of operating voltages.
Provided with tolerances down to 1%, the
Mini-Mox resistor works well in precision
circuits.
Resistor Metal Oxide
Coating Epoxy
Core Alumina
Terminals Solder-coated axial. RoHS solder composition is
96% Sn, 3.5% Ag, 0.5% Cu
Resistance
Range
500K to 1,500MΩ
Power Rating 0.25W to 0.5W
Voltage Rating 500V to 1,000V
Tolerance 0.1% to 20%
Maximum Value Available
Tolerance MOX200 MOX300
0.10% 10MΩ 10MΩ
0.25% 20MΩ 20MΩ
0.50% 30MΩ 30MΩ
1%-20% 1500MΩ 2500MΩ
Operating
Temperature
-55°C to +155°C
Max. Overload
Voltage
1,000V (MOX200); 1,500V (MOX300)
Max. Pulse
Voltage
1,500V (MOX200); 3,000V (MOX300)
Temp. Coeff. of
Resistance
Series 100 PPM/°C 200 PPM/°C 300 PPM/°C
MOX200 500K-100MΩ 101M-1000MΩ 1001M-1500MΩ
MOX300 500K-100MΩ 101M-1000MΩ 1001M-2500MΩ
APPLICATIONS
•Avionics
•Medicalelectronics
•Highgainfeedbackapplications
•Currentpulselimiters
•Vacuumandspaceapplication
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
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0.24" ±.4
6mm ±1
2.05" ±.12
52mm ±3
0.20 ±.02
5mm ±0.5
0.03"
0.8mm
max.
L1L2
L1 – L2 = 1mm max.
2.6"
67mm
min.
0.05"
1.2mm
max.
11.02" ±0.12
280mm ±3
2.56" ±0.08
65mm ±2
0.59" ±0.04
15mm ±1
0
Tape and reel
G= 2%
J= 5%
K=10%
M=15%
P=20%
Tolerance
B= 0.10%
C= 0.25%
D= 0.5%
F= 1%
Mini Mox Series
MOX-20000 or
MOX-30000
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
10R2 = 10.2 ohms
1000 = 100 ohms
1503 = 150,000 ohms
RoHS
Compliant
MOX200001003FER
Tape and reel
2500 qty./reel std.
A max. B ±0.5mm d ±0.05mm
Series Power Rating (in/mm) (in/mm) (in/mm)
MOX200 0.25W 0.26” / 6.5 0.09” / 2.2 0.024” / 0.6
MOX300 0.50W 0. 35” / 9 0.13” / 3.3 0.025” / 0.65
A
B30mm ±3
d
Mini-Mox
0.25 Watt and 0.5 Watt
Precision Thick Film Axial Terminal
High Voltage/High Resistance
DIMENSIONS
(mm)
HOW TO ORDER
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68
Resistor Metal Oxide
Coating Silicone or Epoxy
Core Alumina
Terminals Solder-coated axial. RoHS
solder composition is 96% Sn,
3.5% Ag, 0.5% Cu
Resistance Range 500Ω to 1 Teraohm
Power Rating 0.35W to 1.5W
Voltage Rating 2500V to 7.5KV
Tolerance 0.5% to 20%; not all toler-
ances available in all values
Operating
Temperature
-55°C to +220°C
Temp. Coefficient 25ppm/°C 0° to 85°C available
Mini-Mox
Precision Thick Film Axial Terminal
High Voltage/High Resistance
Ohmite Resistance Voltage Available Capacitance
Series Range (Ohms) Power Rating Tolerances* (pf)
• High-temperature (silicone coated) @70°C
MOX-400-22 500Ω to 300,000M 0.35W 2,500V 1% to 20% 1.00
MOX-750-22 750Ω to 600,000M 0.70W 5,000V 1% to 20% 0.75
MOX1125-22 1K to 1,000,000M 1.40W 7,500V 1% to 20% 0.25
• Standard (epoxy coated) @25°C
MOX-400-23 500Ω to 300,000M 0.75W 2,500V 0.5% to 20% 1.00
MOX-750-23 1K to 600,000M 1.00W 5,000V 0.5% to 20% 0.75
MOX1125-23 1K to 1,000,000M 1.50W 7,500V 0.5% to 20% 0.25
Performance Data
Characteristic Test Method Specification
Humidity MIL-STD-202, Method 103B,
Condition B
±0.25%
Dielectric
Withstanding Voltage
MIL-STD-202, Method 301,
750V
±0.25%
Insulation Resistance MIL-STD-202, Method 302,
Condition A or B
>10,000M or greater
dry
Thermal Shock MIL-STD-202, Method 107G,
Condition B, B-1, or F
±0.20%
Load Life MIL-STD-202, Method 108A,
Condition D
±2.0%
Resistance to
Solvents
MIL-STD-202, Method 215G Acceptable for the
Standard Series Only
Terminal Strength MIL-STD-202, Method 211A,
Condition A or B
±0.25%
Shock (Specified
Pulse)
MIL-STD-202, Method 213B,
Condition I
±0.25%
Vibration, High
Frequency
MIL-STD-202, Method 204D,
Condition D
±.020%
Power Conditioning MIL-R-49462A, Par 4.8 ±0.50%
Solderability MIL-STD-202, Method 208F >95% Coverage
Derating
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 10050 175
80
40
110°
25 75 125 150 200
210°
Epoxy
Silicone
225
70°
FEATURES
•Wideresistanceranges
•Siliconeorepoxycoating
•Metaloxideresistiveelement
APPLICATIONS
•Avionics
•Medicalelectronics
•Highgainfeedbackapplications
•Currentpulselimiters
•Vacuumandspaceapplication
The Mini-Mox resistor is very ver-
satile, covering a wide resistance
range as well as a wide range of
operating voltages. Provided with
tolerances down to 0.5%, the Mini-
Mox resistor works well in precision
circuits.
*Some tolerances
are not available
over the entire
resistance range.
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
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MOX1125231006FE
Mini Mox
Series
Terminal
0 = MOX-200 or 300;
MOX-200 Z or 300 Z = 50ppm
2 = 0.020"
7 = 0.032"
Style
200, 300, 400,
750, 1125
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Coating
2 = Black silicone
3 = Epoxy
6 = No coating
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
10R2 = 10.2 ohms
1000 = 100 ohms
1503 = 150,000 ohms
E = RoHS Compliant
Not all tolerances
available in
all values.
Series Power A max. B max.
• High-temperature (silicone coated) @70°C
MOX-400-22 0.35W 0.510” / 12.95 0.140” / 3.56
MOX-750-22 0.70W 0.820” / 20.83 0.140” / 3.56
MOX1125-22 1.40W 1.210” / 30.73 0.140” / 3.56
• Standard (epoxy coated) @25°C
MOX-400-23 0.75W 0.580” / 14.78 0.165” / 4.19
MOX-750-23 1.00W 0.880” / 22.35 0.165” / 4.19
MOX1125-23 1.50W 1.270” / 32.26 0.165” / 4.19
A
B1.5" typ.
lead dia.
0.020" typ.
Mini-Mox
Precision Thick Film Axial Terminal
High Voltage/High Resistance
DIMENSIONS
(in./mm)
HOW TO ORDER
Temp. Coeff. of Resistance Voltage Coeff. of Resistance**
Resistor Series 25 PPM/°C 50 PPM/°C 100 PPM/°C < 2PPM/Volt < 5PPM/Volt
MOX-400 1K-99M 100M-450M 451M-30,000M 1K-1,000M 1,001M-100,000M
MOX-750 1K-199M 200M-900M 901M-70,000M 1K-2,000M 2,001M-100,000M
MOX1125 1K-299M 300M-1,350M 1,351M-100,000M 1K-3,000M 3,001M-100,000M
*TCR of 25ppm for temperature range of 0°C-85°C. TCR of 50ppm and 100ppm for -55°C to 125°C. Consult fac-
tory for TCR values operating higher than 125°C
**For tighter VCs please contact Ohmite.
STANDARD TEMP./VOLTAGE COEFFICIENTS OF RESISTANCE
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70
Maxi-Mox
Precision Thick Film Axial Terminal
High Voltage/High Resistance
Ohmite Resistance Power Voltage Available Capacitance
Series Range (Ω) @70°C Rating Tolerances* (pf)
• High-temperature (silicone coated)
MOX-1-12 250Ω to 300,000M 2.5W 10.0KV 1% to 20% 0.75
MOX-2-12 500Ω to 700,000M 5.0W 20.0KV 1% to 20% 0.60
MOX-3-12 750Ω to 1,000,000M 7.5W 30.0KV 1% to 20% 0.50
MOX-4-12 1K to 1,000,000M 10.0W 40.0KV 1% to 20% 0.40
MOX-5-12 1.25K to 1,000,000M 12.5W 50.0KV 1% to 20% 0.30
• Standard (epoxy coated) @25°C
MOX-1-13 250Ω to 300,000M 2.0W 10.0KV 0.1% to 20% 0.75
MOX-2-13 500Ω to 700,000M 3.0W 20.0KV 0.1% to 20% 0.60
MOX-3-13 750Ω to 1,000,000M 4.0W 30.0KV 0.1% to 20% 0.50
MOX-4-13 1K to 1,000,000M 5.0W 40.0KV 0.1% to 20% 0.40
MOX-5-13 1.25K to 1,000,000M 6.0W 50.0KV 0.1% to 20% 0.30
*Sometolerancesarenotavailableovertheentireresistancerange.
DERATING
Maxi-Mox resistors are also versatile.
Suitable for industrial applications
requiringstillmorepowerforhigh
voltage switching, industrial control,
and high voltage current limiting.
FEATURES
•Wideresistanceranges
•Voltageratingto50KV
•Powerratingto12.5watts
•Siliconeorepoxycoating
•Non-inductiveavailable
SERIES SPECIFICATIONS
CHARACTERISTICS
Core Alumina
Resistor Thick Film
Terminal RoHS solder composition is 96% Sn, 3.5% Ag,
0.5% Cu
Resistance Range 250Ωto 1 Teraohm
Power Rating 2.0W to 12.5W
Voltage Rating 10KV to 50KV
Tolerance 0.5% to 20%; not all tolerances available in all
values
Operating Temperature -55°C to +210°C
Temperature
Coefficient
25ppm/°C 0° to 85°C available
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 10050 175
80
40
110°
25 75 125 150 200
210°
Epoxy
Silicone
225
70°
APPLICATIONS
•HVpowersupplies
•Powerdistribution
•Medicalinstrumentation
•Avionics
(continued)
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MOX-1N-131006FE
Maxi Mox
Series
Non-inductive
optional
Terminal
1 = 0.032"
Style
1,2,3,4,5,8
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Coating
2 = Black silicone
3 = Epoxy
6 = No coating
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
1000 = 100Ω
1503 = 150,000Ω
5005 = 50,000,000Ω
RoHS Compliant
A
B
1.5" typ.
lead dia.
0.032" typ.
ORDERING INFORMATION
PERFORMANCE DATA
Characteristic Test Method Specification
Humidity MIL-STD-202, Method 103B, Condition B ±0.25%
Dielectric Withstanding Voltage MIL-STD-202, Method 301, 750V ±0.25%
Insulation Resistance MIL-STD-202, Method 302, Condition A or B >10,000 M or greater dry
Thermal Shock MIL-STD-202, Method 107G, Condition B, B-1, or F ±0.20%
Load Life MIL-STD-202, Method 108A, Condition D ±1.0%
Resistance to Solvents MIL-STD-202, Method 215G Acceptable for High Reliability Series only
Terminal Strength MIL-STD-202, Method 211A, Condition A or B ±0.25%
Shock (Specified Pulse) MIL-STD-202, Method 213B, Condition I ±0.25%
Vibration High Frequency MIL-STD-202, Method 204D, Condition D ±0.20%
Power Conditioning MIL-R-49462A, Par 4.8 ±0.50%
Solderability MIL-STD-202, Method 208F >95% Coverage
DIMENSIONS
TEMP. AND VOLTAGE COEFFICIENTS OF RESISTANCE
Temp. Coeff. of Resistance* Voltage Coeff. of Resistance**
Resistor Series 25 PPM/°C 50 PPM/°C 100 PPM/°C < 2PPM/Volt < 5PPM/Volt
MOX-1 1K-99M 100M-450M 451M-30,000M 250Ω-1,000M 1,001M-100,000M
MOX-2 1K-199M 200M-1,000M 1,001M-60,000M 500Ω-2,600M 2,601M-200,000M
MOX-3 1K-299M 300M-1,500M 1,501M-90,000M 750Ω-4,000M 4,001M-300,000M
MOX-4 1K-399M 400M-2,000M 2,001M-120,000M 1K-5,300M 5,301M-400,000M
MOX-5 1K-499M 500M-2,500M 2,501M-150,000M 1.25K-6,700M 6,701M-500,000M
*TCRof25ppmfortemperaturerangeof0°C-85°C.TCRof50ppmand100ppmfor-55°Cto125°C.ConsultfactoryforTCRvaluesoperatinghigherthan125°C
**FortighterVCspleasecontactOhmite.
Not all tolerances
available in
all values.
Maxi-Mox
Precision Thick Film Axial Terminal
High Voltage/High Resistance
Ohmite A max. B max.
Series Power (in/mm) (in/mm)
• High-temperature (silicone coated)
MOX-1-12 2.5W 1.120” / 28.45 0.310” / 7.87
MOX-2-12 5.0W 2.120” / 53.85 0.310” / 7.87
MOX-3-12 7.5W 3.120” / 79.24 0.310” / 7.87
MOX-4-12 10.0W 4.120” / 104.65 0.310” / 7.87
MOX-5-12 12.5W 5.120” / 130.05 0.310” / 7.87
• Standard (epoxy coated)
MOX-1-13 2.0W 1.140” / 28.96 0.345” / 8.76
MOX-2-13 3.0W 2.140” / 54.36 0.345” / 8.76
MOX-3-13 4.0W 3.140” / 79.76 0.345” / 8.76
MOX-4-13 5.0W 4.140” / 105.16 0.345” / 8.76
MOX-5-13 6.0W 5.140” / 130.56 0.345” / 8.76
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72
CHARACTERISTICS
DIMENSIONS
ORDERING INFORMATION
Resistance
Range
1M to
10,000,000M
Power Rating 0.5W at 25°C
Voltage Rating 1.0KV
Temperature
Coefficient
as low as
50PPM/°C
RX-1M Hi-Meg
Ultra High Resistance
High Stability Hermetically Sealed
Handling and Cleaning of RX-1M Resistors:
These glass encapsulated resistors, especially
thoseofhigherresistancevalue,requireextraor-
dinary cleanliness. These resistors should be
handled by the terminals, unless gloves are worn.
Fingerprintsonthesurfaceoftheresistorwill
attract contaminants and moisture, which will
cause a parallel resistance path, reducing the
resistancevalueofthedevice.Ifcleaningshould
become necessary, use isopropyl alcohol and light-
lywipedrywithlintfreetissuessuchasKimwipes.
1.875"/
47.63 mm
max.
0.9"/
22.9 mm
min.
0.9"/
22.9 mm
min.
0.198"/
5.0 mm
dia. max.
0.025" ±.002
0.64 mm
RX-1M1006FE
Hi-Meg
Series
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
1506 = 150 MΩ
1509 = 150 GΩ
150A = 1.5 TΩ
100B = 10 TΩ
RoHS
Compliant
TheseHi-Megresistorsaredesigned
for use in electrometer circuits
where a high order of performance
isrequired.Theseresistorsachieve
a high degree of accuracy and
stability, and operate at this high
performance level for an extended
period of time. By being vacuum
sealed in a glass envelope, these
Hi-Megsaresuitableforultra-high
vacuum applications.
FEATURES
•Glasssealedhermetricresistors
•Improvedtemperaturestability
•Improvedvoltagestability
•Metaloxideresistiveelements
•Nooutgassing
•RoHScompliant
•Calibrationavailable
APPLICATIONS
•Ultrahighvacuum
•Medicalinstrumentation
•Currentpulselimiters
•Avionics
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Slim-Mox
Precision Thick Film Planar
Max. Capac-
Ohmite Resistance Power Operating itance
Series Range (Ohms) @25°C Voltage (pf)
SLIM-MOX10003 100Ω to 500M 0.25W 1.5KV 1.00
SLIM-MOX10103 100Ω to 1,000M 0.50W 2.0KV 1.00
SLIM-MOX10203 200Ω to 5,000M 1.00W 5.0KV 0.90
SLIM-MOX10303 250Ω to 5,000M 1.25W 7.5KV 0.75
SLIM-MOX10403 500Ω to 5,000M 1.50W 10.0KV 0.70
SLIM-MOX10603 750Ωto 5,000M 2.00W 15.0KV 0.65
SLIM-MOX10803 1K to 5,000M 2.50W 20.0KV 0.60
SLIM-MOX20203 500Ω to 5,000M 1.50W 5.0KV 1.10
SLIM-MOX20403 1K to 5,000M 2.00W 10.0KV 0.80
SLIM-MOX20603 2K to 5,000M 2.50W 15.0KV 0.75
SLIM-MOX20803 2K to 5,000M 3.00W 20.0KV 0.65
SLIM-MOX21003 3K to 5,000M 3.50W 25.0KV 0.60
SLIM-MOX30603 3K to 5,000M 3.50W 15.0KV 0.75
SLIM-MOX30803 4K to 5,000M 4.00W 20.0KV 0.50
SLIM-MOX31003 5K to 5,000M 4.50W 25.0KV 0.40
SLIM-MOX40403 3K to 5,000M 3.00W 10.0KV 1.00
SLIM-MOX40803 5K to 5,000M 5.00W 20.0KV 0.80
SLIM-MOX41003 5K to 5,000M 5.50W 25.0KV 0.50
Contact Ohmite for custom configurations. *Maximum voltage and power rating determined by
Ohm’s law: P=V2/R
Ohmite’s Slim-Mox provides stable per-
formance for a wide range of resistance
values,withvoltageratingsupto25K.
Lowtemperaturecoefficientsareavail-
able for high stability circuit applications.
The space-saving planar package offers
and alternative to traditional high voltage
resistors.
APPLICATIONS
•HVpowersupplies
•Medicalinstrumentation
•Currentpulselimiters
•Ionizationchambers
FEATURES
• High dielectric & low out-
gassing epoxy coating
• Low resistor noise
• Non inductive
• RoHS compliant
• Radial terminals
SERIES SPECIFICATIONS
CHARACTERISTICS
Resistor Element Thick film on Alumina
Coating Epoxy or Silicone
Terminals RoHS solder composition is
96% Sn, 3.5% Ag, 0.5% Cu
Resistance Range 100 Ohms to 5,000M
Power Rating 0.25W to 5.5W
Voltage Rating 1.5KV to 25KV
Tolerance 0.5% to 20%; not all toler-
ances available in all values
Operating
Temperature
-55°C to +110°C
Temperature
Coefficient
See table
Series Power @25°C A max. B max. C ±0.025 D ±0.002
SLIM-MOX10003 0.25W 0.30” / 7.62 0.30” / 7.62 0.10” / 2.54 0.025” / 0.635
SLIM-MOX10103 0.50W 0.34” / 8.64 0.33” / 8.38 0.20” / 5.08 0.025” / 0.635
SLIM-MOX10203 1.00W 0.34” / 8.64 0.58” / 14.73 0.40” / 10.16 0.032” / 0.813
SLIM-MOX10303 1.25W 0.34” / 8.64 0.83” / 21.08 0.60” / 15.24 0.032” / 0.813
SLIM-MOX10403 1.50W 0.34” / 8.64 1.08” / 27.43 0.90” / 22.86 0.032” / 0.813
SLIM-MOX10603 2.00W 0.34” / 8.64 1.58” / 40.13 1.40” / 35.56 0.032” / 0.813
SLIM-MOX10803 2.50W 0.34” / 8.64 2.08” / 52.83 1.90” / 48.26 0.032” / 0.813
SLIM-MOX20203 1.50W 0.59” / 14.99 0.58” / 14.73 0.40” / 10.16 0.032” / 0.813
SLIM-MOX20403 2.00W 0.59” / 14.99 1.08” / 27.43 0.90” / 22.86 0.032” / 0.813
SLIM-MOX20603 2.50W 0.59” / 14.99 1.58” / 40.13 1.40” / 35.56 0.032” / 0.813
SLIM-MOX20803 3.00W 0.59” / 14.99 2.08” / 52.83 1.90” / 48.26 0.032” / 0.813
SLIM-MOX21003 3.50W 0.59” / 14.99 2.58” / 65.53 2.40” / 60.96 0.032” / 0.813
SLIM-MOX30603 3.50W 0.84” / 21.34 1.58” / 40.13 1.40” / 35.56 0.032” / 0.813
SLIM-MOX30803 4.00W 0.84” / 21.34 2.08” / 52.83 1.90” / 48.26 0.032” / 0.813
SLIM-MOX31003 4.50W 0.84” / 21.34 2.58” / 65.53 2.40” / 60.96 0.032” / 0.813
SLIM-MOX40403 3.00W 1.09” / 27.69 1.08” / 27.43 0.90” / 22.86 0.032” / 0.813
SLIM-MOX40803 5.00W 1.09” / 27.69 2.08” / 52.83 1.90” / 48.26 0.032” / 0.813
SLIM-MOX41003 5.50W 1.09” / 27.69 2.58” / 65.53 2.40” / 60.96 0.032” / 0.813
B
A
D
C
0.1"
1.3"
typ.
DIMENSIONS
in./mm
Slim-Mox
Radial Terminal
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74
B
A
C
0.1"
1.3"
typ.
E
Series C E
SLIM-MOX103RD 0.60”/ 15.24 0.20”/ 5.08
SLIM-MOX104RD 0.90”/ 22.86 0.20”/ 5.08
SLIM-MOX106RD 1.40”/ 35.56 0.20”/ 5.08
SLIM-MOX108RD 1.90”/ 48.26 0.60”/ 15.24
SLIM-MOX204RD 0.90”/ 22.86 0.20”/ 5.08
SLIM-MOX206RD 1.40”/ 35.56 0.20”/ 5.08
SLIM-MOX208RD 1.90”/ 48.26 0.40”/ 10.16
SLIM-MOX210RD 2.40”/ 60.96 0.20”/ 5.08
SLIM-MOX306RD 1.40”/ 35.56 0.30”/ 7.62
SLIM-MOX308RD 1.90”/ 48.26 0.30”/ 7.62
SLIM-MOX310RD 2.40”/ 60.96 0.20”/ 5.08
SLIM-MOX408RD 1.90”/ 48.26 0.30”/ 7.62
SLIM-MOX410RD 2.40”/ 60.96 0.20”/ 5.08
Ohmite Power Operating
Series @25°C Voltage
SLIM-MOX103RD 0.75W 5.0KV
SLIM-MOX104RD 1.00W 10.0KV
SLIM-MOX106RD 1.50W 12.0KV
SLIM-MOX108RD 2.00W 15.0KV
SLIM-MOX204RD 1.50W 10.0KV
SLIM-MOX206RD 2.00W 12.0KV
SLIM-MOX208RD 2.50W 20.0KV
SLIM-MOX210RD 3.00W 25.0KV
SLIM-MOX306RD 3.00W 12.0KV
SLIM-MOX308RD 3.50W 20.0KV
SLIM-MOX310RD 4.00W 25.0KV
SLIM-MOX408RD 4.50W 20.0KV
SLIM-MOX410RD 5.00W 25.0KV
Contact Ohmite for custom configurations.
Slim-Mox Divider
Precision Thick Film Voltage
Multiple taps are provided
ontheSlim-MoxRDforuse
in advanced circuit designs.
Tight ratio tolerances make
these resistors ideal for pre-
cisionapplicationsrequiring
consistent performance.
FEATURES
•Customconfigura-
tions are available.
Contact Ohmite with
your specifications
•RoHScompliant
CHARACTERISTICS
Resistance range 1M to 5,000M ohms
Resistance ratio 100:1 - 5000 : 1
To specify dividers outside this range,
please see our website at:
www.ohmite.com/dividers
A complete description of the SLIM-MOX
Divider is required. EXAMPLE:
RT = 500MΩ 5%
R1 = 499.5MΩ 5%
R2 = 500KΩ 1%
Ratio = RT / R2 = 1,000: 1, 1%
Resistor element Thick film on Alumina
Ratio tolerances 0.5% to 5%
Temperature
Coefficient Tracking
TCR tracking to 10ppm and VCR track-
ing to 1ppm
SERIES SPECIFICATIONS
DIMENSIONS
in. ±.025 /mm
To specify Slim-Mox Dividers,
please see our website at:
www.ohmite.com/dividers
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Slim-Mox HT
High Temperature Thick Film Precision
B
A
D
C
0.07"
1.3"
typ.
Ohmite Resistance Power Voltage
Series Range (Ohms) @25°C Rating
SLIM-MOX10002 100Ω to 500M 0.40W 1.5KV
SLIM-MOX10102 100Ω to 1,000M 0.75W 2.0KV
SLIM-MOX10202 200Ω to 5,000M 1.50W 5.0KV
SLIM-MOX10302 250Ω to 5,000M 2.00W 7.5KV
SLIM-MOX10402 500Ω to 5,000M 2.50W 10.0KV
SLIM-MOX10602 750Ω to 5,000M 3.25W 15.0KV
SLIM-MOX10802 1K to 5,000M 4.25W 20.0KV
SLIM-MOX20202 500Ω to 5,000M 2.50W 5.0KV
SLIM-MOX20402 1K to 5,000M 3.25W 10.0KV
SLIM-MOX20602 2K to 5,000M 4.25W 15.0KV
SLIM-MOX20802 2K to 5,000M 5.00W 20.0KV
SLIM-MOX21002 3K to 5,000M 5.75W 25.0KV
SLIM-MOX30602 3K to 5,000M 5.50W 15.0KV
SLIM-MOX30802 4K to 5,000M 6.75W 20.0KV
SLIM-MOX31002 5K to 5,000M 7.50W 25.0KV
SLIM-MOX40402 3K to 5,000M 5.00W 10.0KV
SLIM-MOX40802 5K to 5,000M 8.25W 20.0KV
SLIM-MOX41002 5K to 5,000M 9.00W 25.0KV
Contact Ohmite for custom configurations.
Series Power @25°C A max. B max. C ±0.025 D ±0.002
SLIM-MOX10002 0.40W 0.20” / 5.08 0.20” / 5.08 0.10” / 2.54 0.025” / 0.635
SLIM-MOX10102 0.75W 0.25” / 6.35 0.25” / 6.35 0.20” / 5.08 0.025” / 0.635
SLIM-MOX10202 1.50W 0.25” / 6.35 0.50” / 12.70 0.40” / 10.16 0.032” / 0.813
SLIM-MOX10302 2.00W 0.25” / 6.35 0.75” / 19.05 0.60” / 15.24 0.032” / 0.813
SLIM-MOX10402 2.50W 0.25” / 6.35 1.00” / 25.40 0.90” / 22.86 0.032” / 0.813
SLIM-MOX10602 3.25W 0.25” / 6.35 1.50” / 38.10 1.40” / 35.56 0.032” / 0.813
SLIM-MOX10802 4.25W 0.25” / 6.35 2.00” / 50.80 1.90” / 48.26 0.032” / 0.813
SLIM-MOX20202 2.50W 0.50” / 12.70 0.50” / 12.70 0.40” / 10.16 0.032” / 0.813
SLIM-MOX20402 3.25W 0.50” / 12.70 1.00” / 38.10 0.90” / 22.86 0.032” / 0.813
SLIM-MOX20602 4.25W 0.50” / 12.70 1.50” / 38.10 1.40” / 35.56 0.032” / 0.813
SLIM-MOX20802 5.00W 0.50” / 12.70 2.00” / 50.80 1.90” / 48.26 0.032” / 0.813
SLIM-MOX21002 5.75W 0.50” / 12.70 2.50” / 63.50 2.40” / 60.96 0.032” / 0.813
SLIM-MOX30602 5.50W 0.75” / 19.05 1.50” / 38.10 1.40” / 35.56 0.032” / 0.813
SLIM-MOX30802 6.75W 0.75” / 19.05 2.00” / 50.80 1.90” / 48.26 0.032” / 0.813
SLIM-MOX31002 7.50W 0.75” / 19.05 2.50” / 63.50 2.40” / 60.96 0.032” / 0.813
SLIM-MOX40402 5.00W 1.00” / 25.40 1.00” / 25.40 0.90” / 22.86 0.032” / 0.813
SLIM-MOX40802 8.25W 1.00” / 25.40 2.00” / 50.80 1.90” / 48.26 0.032” / 0.813
SLIM-MOX41002 9.00W 1.00” / 25.40 2.50” / 63.50 2.40” / 60.96 0.032” / 0.813
Resistor Element Thick film on Alumina
Coating Silicone
Resistance Range 100Ω to 5,000M
Power Rating 0.25W to 9.0W
Voltage Rating 1.5KV to 25KV
Tolerance 0.5% to 20%; not all toler-
ances available in all values
Operating
Temperature
-55°C to +180°C
TheSlim-MoxHTprovidesahigherpowerratingforhighambi-
ent temperature environments. Appropriate for mounting near
heatgeneratingcomponents.TheSlim-MoxHTisfinishedwith
a rugged silicone coating suitable for most environments. FEATURES
•Outstandingvoltagecoefficient
•Hightemperaturesiliconecoating
•Lowresistornoise
•Noninductive
•Customconfigurationsareavailable.
Contact Ohmite with your specifications
•RoHScompliant
•RadialTerminals
APPLICATIONS
•HVpowersupplies
•Medicalinstrumentation
•Currentpulselimiters
•Ionizationchambers
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
in. /mm
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76
Slim-Mox HT Divider
High Temperature Thick Film Voltage Divider
B
A
0.07"
1.3"
typ.
C
E
Ohmite Power Operating
Series @25°C Voltage
SLIM-MOX103RD 1.25W 5.0KV
SLIM-MOX104RD 1.50W 10.0KV
SLIM-MOX106RD 2.50W 12.0KV
SLIM-MOX108RD 3.25W 15.0KV
SLIM-MOX204RD 2.50W 10.0KV
SLIM-MOX206RD 3.25W 12.0KV
SLIM-MOX208RD 4.25W 20.0KV
SLIM-MOX210RD 5.00W 25.0KV
SLIM-MOX306RD 4.50W 12.0KV
SLIM-MOX308RD 5.00W 20.0KV
SLIM-MOX310RD 5.75W 25.0KV
SLIM-MOX408RD 6.75W 20.0KV
SLIM-MOX410RD 7.50W 25.0KV
Contact Ohmite for custom configurations.
Series Power Rating C E
SLIM-MOX103RD 1.25W 0.60” / 15.24 0.20” / 5.08
SLIM-MOX104RD 1.50W 0.90” / 22.86 0.20” / 5.08
SLIM-MOX106RD 2.50W 1.40” / 35.56 0.20” / 5.08
SLIM-MOX108RD 3.25W 0.90” / 22.86 0.60” / 15.24
SLIM-MOX204RD 2.50W 0.90” / 22.86 0.20” / 5.08
SLIM-MOX206RD 3.25W 1.40” / 35.56 0.20” / 5.08
SLIM-MOX208RD 4.25W 1.90” / 48.26 0.40” / 10.16
SLIM-MOX210RD 5.00W 2.40” / 60.96 0.20” / 5.08
SLIM-MOX306RD 4.50W 1.40” / 35.56 0.30” / 7.62
SLIM-MOX308RD 5.00W 1.90” / 48.26 0.30” / 7.62
SLIM-MOX310RD 5.75W 2.40” / 60.96 0.20” / 5.08
SLIM-MOX408RD 6.75W 1.90” / 48.26 0.30” / 7.62
SLIM-MOX410RD 7.50W 2.40” / 60.96 0.20” / 5.08
Slim-MoxHTRDresistor
dividers complete the Slim-
Mox family with the high
temperature divider configura-
tion. These resistors are use-
ful wherever multiple voltage
drops are needed in a circuit.
Designedtocustomerspeci-
fications,theSlim-MoxHT
RDresistorutilizesourthick
film on alumina technology
to offer flexible termination
schemes.
FEATURES
•HighTemperature
Operation
•RoHScompliant
•RadialTerminals
CHARACTERISTICS
Resistance range 1M to 5,000M ohms
Resistance ratio 100:1 - 5000 : 1
To specify dividers outside this range,
please see our website at:
www.ohmite.com/dividers
A complete description of the SLIM-MOX
Divider is required. EXAMPLE:
RT = 500MΩ 5%
R1 = 499.5MΩ 5%
R2 = 500KΩ 1%
Ratio = RT / R2 = 1,000: 1, 1%
Resistor element Thick film on Alumina
Ratio tolerances 0.5% to 5%
Temperature
Coefficient Tracking
TCR tracking to 10ppm and VCR track-
ing to 1ppm
SERIES SPECIFICATIONS
DIMENSIONS
in. ±0.025 /mm
(continued)
To specify Slim-Mox Dividers,
please see our website at:
www.ohmite.com/dividers
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 77
100
Percent Rated Watts
Ambient Te mperature, °C
60
20
00 10050 175
80
40
11 0°
25 75 125 150 200
180°
Epoxy
Silicone
70°
Slim-Mox
All products
Temp. Coeff. of Resistance*
0°C-85°C 85°C-125°C Voltage Coeff. of Resistance**
Resistor Series 25 PPM/°C 50 PPM/°C 100 PPM/°C < 2PPM/Volt < 5PPM/Volt
SLIM-MOX100 100 to 300M 100Ω to 50M 51M to 500M 100Ω to 140M 141M to 500M
SLIM-MOX101 100 to 800M 100Ω to 100M 101M to 1,000M 100Ω to 270M 271M to 1,000M
SLIM-MOX102 200 to 1,500M 200Ω to 250M 251M to 5,000M 200Ω to 640M 641M to 5,000M
SLIM-MOX103 250 to 800M 250Ω to 440M 441M to 5,000M 250Ω to 1,100M 1,101M to 5,000M
SLIM-MOX104 500 to 2,500M 500Ω to 450M 451M to 5,000M 500Ω to 1,100M 1,101M to 5,000M
SLIM-MOX106 750 to 5,000M 750Ω to 675M 676M to 5,000M 750Ω to 1,600M 1,601M to 5,000M
SLIM-MOX108 1K to 2,500M 1K to 375M 376M to 5,000M 1K to 940M 941M to 5,000M
SLIM-MOX202 500 to 1,500M 500Ω to 200M 201M to 5,000M 500Ω to 520M 521M to 5,000M
SLIM-MOX204 1K to 1,750M 1K to 375M 376M to 5,000M 1K to 950M 951M to 5,000M
SLIM-MOX206 2K to 4,500M 2K to 600M 601M to 5,000M 2K to 1,500M 1,501M to 5,000M
SLIM-MOX208 2K to 5,000M 2K to 1,000M 1,001M to 5,000M 2K to 2,500M 2,501M to 5,000M
SLIM-MOX210 3K to 5,000M 3K to 1,000M 1,001M to 5,000M 3K to 2,600M 2,601M to 5,000M
SLIM-MOX306 3K to 5,000M 3K to 1,000M 1,001M to 5,000M 3K to 2,600M 2,601M to 5,000M
SLIM-MOX308 4K to 5,000M 4K to 1,200M 1,201M to 5,000M 4K to 3,000M 3,001M to 5,000M
SLIM-MOX310 5K to 5,000M 5K to 1,500M 1,501M to 5,000M 5K to 4,000M 4,001M to 5,000M
SLIM-MOX404 3K to 5,000M 3K to 1,100M 1,101M to 5,000M 3K to 2,800M 2,801M to 5,000M
SLIM-MOX408 5K to 5,000M 5K to 1,250M 1,251M to 5,000M 5K to 3,000M 3,001M to 5,000M
SLIM-MOX410 5K to 5,000M 5K to 1,200M 1,201M to 5,000M 5K to 3,000M 3,001M to 5,000M
SLIM-MOX103RD 1M to 800M 1M to 70M 71M to 5,000M 1M to 185M 186M to 5,000M
SLIM-MOX104RD 1M to 2,500M 1M to 275M 276M to 5,000M 1M to 720M 721M to 5,000M
SLIM-MOX106RD 1M to 5,000M 1M to 250M 251M to 5,000M 1M to 640M 641M to 5,000M
SLIM-MOX108RD 1M to 2,500M 1M to 350M 351M to 5,000M 1M to 875M 876M to 5,000M
SLIM-MOX204RD 1M to 1,750M 1M to 300M 301M to 5,000M 1M to 750M 751M to 5,000M
SLIM-MOX206RD 1M to 4,500M 1M to 1,750M 1,751M to 5,000M 1M to 4,500M 4,501M to 5,000M
SLIM-MOX208RD 1M to 5,000M 1M to 625M 626M to 5,000M 1M to 1,550M 1,551M to 5,000M
SLIM-MOX210RD 1M to 5,000M 1M to 950M 951M to 5,000M 1M to 2,400M 2,401M to 5,000M
SLIM-MOX306RD 1M to 5,000M 1M to 800M 801M to 5,000M 1M to 2,000M 2,001M to 5,000M
SLIM-MOX308RD 1M to 5,000M 1M to 1,200M 1,201M to 5,000M 1M to 2,600M 2,601M to 5,000M
SLIM-MOX310RD 1M to 5,000M 1M to 1,000M 1,001M to 5,000M 1M to 3,900M 3,901M to 5,000M
SLIM-MOX408RD 1M to 5,000M 1M to 1,600M 1,601M to 5,000M 1M to 4,000M 4,001M to 5,000M
SLIM-MOX410RD 1M to 5,000M 1M to 1,200M 1,201M to 5,000M 1M to 3,000M 3,001M to 5,000M
*TCR of 25ppm for temperature range of 0°C-85°C. TCR of 50ppm and 100ppm for -55°C to 125°C. Consult factory for TCR
values operating higher than 125°C
**VC’s of <2PPM/Volt are available. Contact Ohmite with your requirement.
PERFORMANCE DATA
Characteristic Test Method Specification
Humidity MIL-STD-202, Method 103B, Condition B ±0.25%
Dielectric Withstanding Voltage MIL-STD-202, Method 301, 750V ±0.25%
Insulation Resistance MIL-STD-202, Method 302, Condition A or B >10,000M or greater dry
Thermal Shock MIL-STD-202, Method 107G, Condition B, B-1, or F ±0.20%
Load Life MIL-STD-202, Method 108A, Condition D ±1.0%
Resistance to Solvents MIL-STD-202, Method 215G No degradation of
coating or marking
Terminal Strength MIL-STD-202, Method 211A, Condition A or B ±0.25%
Shock (Specified Pulse) MIL-STD-202, Method 213B, Condition I ±0.25%
Vibration, High Frequency MIL-STD-202, Method 204D, Condition D ±.020%
Power Conditioning MIL-R-49462A, Par 4.8 ±0.50%
Solderability MIL-STD-202, Method 208F >95% Coverage
SM102031006FTE
Slim Mox
Series
Terminal
0 = 0.032" std.
(for SM102 - 410)
0 = 0.025" std.
(SM100 and 101)
Style
100 to 410
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Coating
2 = Blue silicone (high temp.)
3 = Epoxy (standard)
6 = No coating
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
1000 = 100Ω
1503 = 150,000Ω
5005 = 50,000,000Ω
RoHS
Compliant
Tape &
Reel
Not all tolerances available in all values.
TospecifySlim-MoxDividers,please
seeourwebsiteat:
www.ohmite.com/dividers
DERATING
ORDERING INFORMATION
TEMPERATURE/VOLTAGE COEFFICIENTS OF RESISTANCE
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78
CHARACTERISTICS
SERIES SPECIFICATIONS
Super Mox Series
High Voltage
Insulation
Resistance
>10,000 MΩ 500 Volt 25 °C 75% relative
humidity
Dielectric
Strength
>1,000 Volt 25 °C 75% relative humidity
Thermal
Shock
∆ R/R < 0.1% typ.,
0.20% max.
MIL Std. 202, method 107
Cond. C (IEC 68 -2 -14)
Overload ∆ R/R < 0.1% typ.,
0.25% max.
1,5 x Pnom, 5 sec (do not
exceed max. voltage)
Moisture
Resistance
∆ R/R < 0.1% typ.,
0.25% max.
MIL Std. 202, method 106
(IEC 68 -2 -3)
Load Life ∆ R/R < 0.1% typ.,
0.25% max.
1000 hours at rated power
(IEC 115 -1)
Resistance
Range
from 1KΩ to 50GΩ on all models (contact Ohmite for
51G to 1TΩ)
Tolerances 0.05%, 0.1%, 0.25%, 0.5%, 1%, 2%, 5%, 10%
(0.05% avail. to 10G, 0.25% to 100G, other on
request)
Temperature
Coefficients
5, 10, 15, 25, 50 and 100ppm/°C (10ppm/°C avail-
able to 10G, 25ppm/°C to 100G, other on request.
Temperature coefficient referenced to 25°C, ΔR
taken at +125°C.
Encapsulation Silicone Conformal Coating
Terminal
Material
Gold Plated
Core Material Al2O3 (96%)
Resistor
Material
Ruthenium Oxide
Operating
Temperature
-55°C to 225°C (extended temperature range to
350°C available)
Power Max. Oper.
Series Rating (W) Voltage Res. Range (Ω) VCR*
MOX910 3.80 15,000 1K-500M 0.40
500M-5G 0.75
MOX920 5.00 21,000 1K-1G 0.20
1G-10G 0.40
MOX930 7.50 30,000 1K-1G5 0.15
1G5-15G 0.30
MOX940 10.00 45,000 1K-2G5 0.10
2G5-25G 0.15
MOX950 13.50 60,000 1K-3G 0.08
3G-30G 0.12
MOX960 16.00 72,000 1K-4G 0.06
4G-40G 0.10
MOX970 20.00 90,000 1K-5G 0.04
5G-50G 0.08
* typical values, contact factory for details
Derating
100
Percent Rated Watts
Ambient Temperature, °C
60
20
0150
80
40
100050-50 250200
25°
225°
High-voltageSuperMoxresistorshavebeendevel-
oped to meet the precision temperature stability
requirementsofhigh-accuracyandhigh-voltage
systems. Super Mox combines proprietary non-
inductive resistance system and design to achieve
low temperature coefficient, low voltage coefficients,
high stability and increased high operating voltages.
These resistors are designed to meet the demanding
Uncoated resistor element pictured for
demonstration purposes only. Finished
product is coated with silicone.
requirementsofhighvoltagepowersupplies,elec-
tronmicroscopes,X-raysystems,highresolution
CRT displays and geophysical instruments.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 79
DIMENSIONS
(iin./mm)
ORDERING INFORMATION
MOX91021006JTE
Tolerance*
A= 0.05%
B= 0.10%
C= 0.25%
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
Super Mox Series
see chart for wattage
E = RoHS compliant
Coating
2 = conformal silicone standard
3 = conformal silicone high temp. with 350°C burn in
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
1001 = 1000Ω
1503 = 150,000Ω
1006 = 100 MΩ
TCR
T=100ppm
V= 50ppm
W= 25ppm
X= 15ppm
Y= 10ppm
*Extremely tight
tolerances not available
across the full resistance
range. Consult factory.
Ohms
Part Number Watts 1% tol. TCR
MOX91021004FVE 3.8W 1M 50ppm
MOX91025004FVE 3.8W 5M 50ppm
MOX91021005FVE 3.8W 10M 50ppm
MOX91022505FTE 3.8W 25M 100ppm
MOX92021005FVE 5W 10M 50ppm
MOX92025005FVE 5W 50M 50ppm
MOX92021006FVE 5W 100M 50ppm
MOX92021007FTE 5W 1000M 100ppm
MOX93021004FVE 7.5W 1M 50ppm
MOX93025004FVE 7.5W 5M 50ppm
MOX93021005FVE 7.5W 10M 50ppm
MOX93022505FTE 7.5W 25M 100ppm
MOX94021005FVE 10W 10M 50ppm
MOX94025005FVE 10W 50M 50ppm
MOX94021006FVE 10W 100M 50ppm
MOX94021007FTE 10W 1000M 100ppm
MOX95021004FVE 13.5W 1M 50ppm
MOX95025004FVE 13.5W 5M 50ppm
MOX95021005FVE 13.5W 10M 50ppm
MOX95022505FTE 13.5W 25M 100ppm
MOX96021005FVE 16W 10M 50ppm
MOX96025005FVE 16W 50M 50ppm
MOX96021006FVE 16W 100M 50ppm
MOX96021007FTE 16W 1000M 100ppm
MOX97021004FVE 20W 1M 50ppm
MOX97025004FVE 20W 5M 50ppm
MOX97021005FVE 20W 10M 50ppm
MOX97022505FTE 20W 25M 100ppm
Series L D
MOX910 1.07/ 27.00 0.32/8.00
MOX920 1.46/ 37.00 0.32/8.00
MOX930 2.05/ 52.00 0.32/8.00
MOX940 3.03/ 77.00 0.32/8.00
MOX950 4.02/102.00 0.33/8.30
MOX960 4.80/122.00 0.34/8.50
MOX970 5.98/152.00 0.34/8.50
L ±
1mm
D
1.38" /
35mm
±
2
0.8 mm
Super Mox Series
High Voltage
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80
20 Series
Vitreous Enamel Conformal Axial
Terminal Wirewound, 5% Tolerance Std.
LD
1.5 in. / 38.1mm
Coating Conformal lead free vitreous enamel
Core Ceramic.
Terminals Solder-coated axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance ±5% standard; other tolerances available
Power rating Based on 25°C free air rating (other wattages available)
Overload Under 7 watts: 5 times rated wattage for 5 seconds; 7 watts and over: 10 times rated wattage for 5 seconds
Temperature coefficient 1 to 9.99 ohms: ±50 ppm/°C; 10 ohms and over: ±30 ppm/°C
Series Wattage Ohms Max. Voltage*
21 1 1.0-3.0K 75
22 2 1.0-3.0K 65
23 3 0.1-10K 135
25 5 0.1-28K 330
27 7 0.1-25K 450
20 10 0.1-100K 720
12.5 watt size available on special order
*Maximum Voltage is based on Ohm’s Law [V=√(P*R)] as limited by the resis-
tance value of specified product
Series Wattage Length* (max.) Diam.* (max.) Lead ga.
21 1 0.421 / 10.7 0.156 / 4.0 24
22 2 0.421 / 10.7 0.219 / 5.6 20
23 3 0.515 / 13.1 0.220 / 5.6 20
25 5 1.015 / 25.8 0.276 / 7.0 20
27 7 1.265 / 32.1 0.394 / 10.0 20
20 10 1.859 / 47.2 0.394 / 10.0 20
*For units below 1Ω, add 15% to body diameter, 10% to body length.
FEATURES
•Ruggedvitreousenamelcoatingwithstandshigh
humidity and temperature cycling.
•Durableconstruction,recommendedforindustrial
applications where reliability is paramount.
•All-weldedconstruction.
•Flameresistantleadfreevitreousenamelcoating.
•RoHScompliant;Add“E”suffixtopartnumberto
specify.
The 20 Series axial terminal resistors are both
durable and economical. They have all the electrical
attributes of the more expensive 90 Series resistors,
including all-welded construction.
They offer the durability of a lead free conformal
vitreous enamel coating and are ideal for computer,
communications and industrial applications in which
cost,quality,andreliabilityarekeyconsiderations.
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
(in./mm max.)
(continued)
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Ohmic value
21J––– 1
22J––– 2
23J––– 3
25J––– 5
27J––– 7
20J––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
21J––– 1
22J––– 2
23J––– 3
25J––– 5
27J––– 7
20J––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
21J––– 1
22J––– 2
23J––– 3
25J––– 5
27J––– 7
20J––– 10
Wattage
Part No.
Prefix
Suffix
=Standardvalues
=Non-standardvaluessubjecttominimumhandlingchargeperitem
Shaded values involve very fine resistance wire and should not be
used in critical applications without burn-in and/or thermal cycling.
0.10 ––– R10
0.13 ––– R13
0.15 ––– R15
0.20 ––– R20
0.25 ––– R25
0.30 ––– R30
0.33 ––– R33
0.50 ––– R50
0.75 ––– R75
1 ––– 1R0
1.5 –––1R5
2 –––2R0
2.2 –––2R2
3 –––3R0
4 –––4R0
5 –––5R0
7.5 –––7R5
10 –––10R
12 –––12R
15 –––15R
18 –––18R
20 –––20R
22 –––22R
25 –––25R
27 –––27R
30 –––30R
33 –––33R
35 –––35R
39 –––39R
40 –––40R
47 –––47R
50 –––50R
56 –––56R
62 –––62R
68 –––68R
75 –––75R
82 –––82R
100 –––100
120 –––120
125 –––125
150 –––150
180 –––180
200 –––200
220 –––220
225 –––225
250 –––250
270 –––270
300 –––300
330 –––330
350 –––350
390 –––390
400 –––400
450 –––450
470 –––470
500 –––500
560 –––560
600 –––600
680 –––680
750 –––750
800 –––800
820 –––820
900 –––900
1,000 –––1K0
1,100 –––1K1
1,200 –––1K2
1,500 –––1K5
1,800 –––1K8
2,000 –––2K0
2,200 –––2K2
2,500 –––2K5
2,700 –––2K7
3,000 –––3K0
3,300 –––3K3
3,500 –––3K5
3,900 –––3K9
4,000 –––4K0
4,500 –––4K5
4,700 –––4K7
5,000 –––5K0
6,000 –––6K0
6,800 –––6K8
7,000 –––7K0
7,500 –––7K5
8,000 –––8K0
9,000 –––9K0
10,000 –––10K
12,000 –––12K
13,000 –––13K
15,000 –––15K
17,000 –––17K
20,000 –––20K
22,000 –––22K
25,000 –––25K
30,000 –––30K
33,000 –––33K
35,000 –––35K
40,000 –––40K
50,000 –––50K
21JR10E
20 Series
Vitreous Enamel
Axial Lead
Wirewound
Resistance Value
R10 = 0.10Ω
1R0 = 1.0Ω
10R = 10.0Ω
250 = 250Ω
1K0 = 1,000Ω
4K5 = 4,500Ω
50K = 50,000Ω
Tolerance
J = 5%
RoHS Compliant
Wattage
1= 1W
2
3
5
7
0=10W
ORDERING INFORMATION
Standard part numbers
20 Series
Vitreous Enamel Conformal Axial
Terminal Wirewound, 5% Tolerance Std.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
82
200 Series
Brown Devil® Vitreous Enamel Power
Ohmite’sBrownDevil®isasmall,exceptionally
durablepowerresistor.Itfeaturesall-weldedcon-
struction and rugged, flame resistant conformal lead
free vitreous enamel coating to ensure successful
performance under high temperatures.
The wirewound 200 Series has a hollow-core con-
struction, which accommodates rigid mounting with
brackets or thru bolts.
Mounting brackets not included with resistors.
Series Wattage Ohms Lead Gauge Max. Voltage*
B5 5.25 0.1-20K 20 187
B8 8.0 0.03-25K 18 250
B12 12.0 0.08-51K 18 625
B20 20.0 0.1-100K 18 750
Non-Inductive versions available. Insert “N” before tolerance code.
Example: B5NJ10RE
Also available in low cost Centohm or Silicone coating. Consult Ohmite.
* Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resis-
tance value of specified product
CHARACTERISTICS
FEATURES
•Ruggedleadfreevitreousenamelcoating
•All-weldedconstruction.
•Selfsupportingterminalmountingoption.
•Higherpowerratings.
•Flame-resistantleadfreevitreousenamelcoating.
•RoHScompliantproductavailable.Add“E”suffixto
part number to specify.
SERIES SPECIFICATIONS
Coating lead-free vitreous enamel
Core Ceramic
Terminals Tinned axial; RoHS solder composition is 96% Sn, 3.5%
Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance 1Ω+: ±5%
under 1Ω: ±10%
Power rating Based on 25°C free air rating
Overload 10 times rated wattage for 5 seconds
Temperature coefficient 5Ω and under: ±400 ppm/°C
Above 5Ω: ±260 ppm/°C
Max. amps To calculate, use the formula √P/R
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 83
L
D
1.50 in. -0/+0.25
38.10 mm -0/+6.35
C
= Standard values; check
availability at www.ohmite.com
These values involve very fine
resistance wire and should not
be used in critical applications
without burn-in and/or thermal
cycling:
B5: 6.8K-20KΩ
B8: 12.5K-25KΩ
B12: 30K-51KΩ
B20: 22.5K-100KΩ
0.5 –––R50E
1 –––1R0E
1.1 –––1R1E
1.2 –––1R2E
1.3 –––1R3E
1.5 –––1R5E
1.6 –––1R6E
1.8 –––1R8E
2 –––2R0E
2.2 –––2R2E
2.4 –––2R4E
2.7 –––2R7E
3 –––3R0E
3.3 –––3R3E
3.6 –––3R6E
3.9 –––3R9E
4 –––4R0E
4.3 –––4R3E
4.7 –––4R7E
5 –––5R0E
5.1 –––5R1E
5.6 –––5R6E
6.2 –––6R2E
6.8 –––6R8E
7.5 –––7R5E
8.2 –––8R2E
9.1 –––9R1E
10 –––10RE
11 –––11RE
12 –––12RE
13 –––13RE
15 –––15RE
16 –––16RE
18 –––18RE
20 –––20RE
22 –––22RE
24 –––24RE
25 –––25RE
27 –––27RE
30 –––30RE
33 –––33RE
35 –––35RE
36 –––36RE
39 –––39RE
40 –––40RE
43 –––43RE
47 –––47RE
50 –––50RE
51 –––51RE
56 –––56RE
62 –––62RE
68 –––68RE
75 –––75RE
82 –––82RE
91 –––91RE
100 –––100E
110 –––110E
120 –––120E
125 –––125E
130 –––130E
150 –––150E
160 –––160E
180 –––180E
200 –––200E
220 –––220E
225 –––225E
240 –––240E
250 –––250E
2,250 –––2K25E
2,400 –––2K4E
2,500 –––2K5E
2,700 –––2K7E
2,750 –––2K75E
3,000 –––3K0E
3,300 –––3K3E
3,500 –––3K5E
3,600 –––3K6E
3,900 –––3K9E
4,000 –––4K0E
4,300 –––4K3E
4,500 –––4K5E
4,700 –––4K7E
5,000 –––5K0E
5,100 –––5K1E
5,600 –––5K6E
6,000 –––6K0E
6,200 –––6K2E
6,800 –––6K8E
7,000 –––7K0E
7,500 –––7K5E
8,000 –––8K0E
8,200 –––8K2E
8,500 –––8K5E
9,000 –––9K0E
9,100 –––9K1E
10,000 –––10KE
11,000 –––11KE
12,000 –––12KE
12,500 –––12K5E
13,000 –––13KE
13,500 –––13K5E
15,000 –––15KE
16,000 –––16KE
17,500 –––17K5E
18,000 –––18KE
20,000 –––20KE
22,500 –––22K5E
25,000 –––25KE
30,000 –––30KE
35,000 –––35KE
40,000 –––40KE
45,000 –––45KE
50,000 –––50KE
55,000 –––55KE
60,000 –––60KE
65,000 –––65KE
70,000 –––70KE
75,000 –––75KE
80,000 –––80KE
85,000 –––85KE
90,000 –––90KE
95,000 –––95KE
100,000 –––100KE
Ohmic value
B5J––– 5.25
B8J––– 8
B12J––– 12
B20J––– 20
Wattage
Part No.
Prefix
Suffix
Ohmic value
B5J––– 5.25
B8J––– 8
B12J––– 12
B20J––– 20
Wattage
Part No.
Prefix
Suffix
Ohmic value
B5J––– 5.25
B8J––– 8
B12J––– 12
B20J––– 20
Wattage
Part No.
Prefix
Suffix
270 –––270E
300 –––300E
330 –––330E
350 –––350E
360 –––360E
390 –––390E
400 –––400E
430 –––430E
450 –––450E
470 –––470E
500 –––500E
510 –––510E
560 –––560E
600 –––600E
620 –––620E
650 –––650E
680 –––680E
700 –––700E
750 –––750E
800 –––800E
820 –––820E
900 –––900E
910 –––910E
1,000 –––1K0E
1,100 –––1K1E
1,200 –––1K2E
1,250 –––1K25E
1,300 –––1K3E
1,500 –––1K5E
1,600 –––1K6E
1,750 –––1K75E
1,800 –––1K8E
2,000 –––2K0E
2,200 –––2K2E
Ohmic value
B5J––– 5.25
B8J––– 8
B12J––– 12
B20J––– 20
Wattage
Part No.
Prefix
Suffix
Ohmic value
B5J––– 5.25
B8J––– 8
B12J––– 12
B20J––– 20
Wattage
Part No.
Prefix
Suffix
Tolerance
F= 1%
H= 3%
J= 5%
K= 10%
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS
Compliant
Series
Wattage
Non-Inductive
Winding
Optional (blank
= std. winding)
Coating
Blank =Vitreous
C=Centohm
S=Silicone
200N8D5R000JE
Tolerance
F= 1%
H= 3%
J= 5%
K= 10%
Core Diameter
See “Core and
Terminal Selection”
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
RoHS
Compliant
Coating
200 = Vitreous
400 = Silicone
Ceramic
Wattage
3
5.25
8
12
20
Non-Inductive Winding
Optional (blank
= std. winding)
See web-
site for
custom
core info
Series Wattage L D C Lead Gauge
B5 5.25 0.625 / 15.88 0.250 / 6.35 0.135 / 3.43 20
B8 8.0 1.000 / 25.40 0.313 / 7.94 0.188 / 4.76 18
B12 12.0 1.750 / 44.45 0.313 / 7.94 0.188 / 4.76 18
B20 20.0 2.000 / 50.80 0.438 / 11.11 0.250 / 6.35 18
200 Series
Brown Devil® Vitreous Enamel Power
DIMENSIONS
(in. / mm)
ORDERING INFORMATION
Made-to-order Parts
Standard Values
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
84
40 Series
Ohmicone® Silicone-Ceramic Conformal
Axial Terminal Wirewound
1% and 5% Tolerance Standard
Coating Conformal silicone-ceramic.
Core Ceramic.
Terminals Solder-coated copper clad axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +275°C.
Tolerance ±5% (J type), ±1% (F type) (other tolerances available).
Power rating Based on 25°C free air rating
Overload Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times rated wattage for 5 seconds.
Temperature coefficient Under 1Ω: ±90 ppm/°C; 1Ω to 9.99Ω: ±50 ppm/°C; 10Ω and over: ±20 ppm/°C
Series Wattage Length Diam. Lead ga.
41 1.0 0.437 / 11.1 0.125 / 3.2 24
42 2.0 0.406 / 10.3 0.219 / 5.6 20
43 3.0 0.593 / 15.1 0.219 / 5.6 20
45 5.0 0.937 / 23.8 0.343 / 8.7 18
47 7.0 1.280 / 32.5 0.343 / 8.7 18
40 10.0 1.900 / 48.3 0.406 / 10.3 18
Series Wattage Ohms Voltage
41 1.0 0.10-6K 150
42 2.0 0.10-8K 100
43 3.0 0.10-20K 200
45 5.0 0.10-70K 460
47 7.0 0.10-80K 670
40 10.0 0.10-150K 1000
Non-Inductive versions available. Insert “N” before tolerance code.
Example: 42NJ27R
LD
1.5 in. / 38.1mm
FEATURES
•Economical
•Applicationsincludecommercial,industrialand
communicationsequipment
•Stabilityunderhightemperatureconditions
•All-weldedconstruction
•RoHScompliant;add“E”suffixtopartnumberto
specify.
Ohmite 40 Series resistors are the most economical
conformal silicone-ceramic coated resistors offered.
Theseall-weldedunitsarecharacterizedbytheirlow
temperature coefficients and resistance to thermal
shock, making them ideal for a wide range of electri-
cal and electronic applications.
Unitswith1%and5%tolerancesareidenticalin
constructionandelectricalspecifications.Durable
but economical 40 Series resistors exceed industry
requirementsforquality.
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
(in./mm max.)
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 85
0.1 –––R10
0.15 –––R15
0.2 –––R20
0.25 –––R25
0.3 –––R30
0.33 –––R33
0.4 –––R40
0.5 –––R50
0.75 –––R75
1 –––1R0
1.5 –––1R5
2 –––2R0
2.2 –––2R2
3 –––3R0
4 –––4R0
5 –––5R0
7.5 –––7R5
10 –––10R
12 –––12R
15 –––15R
18 –––18R
20 –––20R
22 –––22R
25 –––25R
27 –––27R
30 –––30R
33 –––33R
35 –––35R
39 –––39R
40 –––40R
47 –––47R
50 –––50R
56 –––56R
62 –––62R
=Standardvalues
=Non-standardvaluessubjecttomini-
mum handling charge per item
Shaded values
involve very fine
resistance wire
and should not
be used in criti-
cal applications
without burn-in
and/or thermal
cycling.
Ohmic value
41F––– 1
43F––– 3
45F––– 5
40F––– 10
41J––– 1
42J––– 2
43J––– 3
45J––– 5
40J––– 10
1% Tolerance 5% Tolerance
Wattage and Tolerance
Part No.
Prefix
Suffix
Ohmic value
41F––– 1
43F––– 3
45F––– 5
40F––– 10
41J––– 1
42J––– 2
43J––– 3
45J––– 5
40J––– 10
1% Tolerance 5% Tolerance
Wattage and Tolerance
Part No.
Prefix
Suffix
2,200 –––2K2
2,500 –––2K5
2,700 –––2K7
3,000 –––3K0
3,300 –––3K3
3,500 –––3K5
3,900 –––3K9
4,000 –––4K0
4,500 –––4K5
4,700 –––4K7
5,000 –––5K0
6,000 –––6K0
6,800 –––6K8
7,000 –––7K0
7,500 –––7K5
8,000 –––8K0
9,000 –––9K0
10,000 –––10K
12,000 –––12K
13,000 –––13K
15,000 –––15K
17,000 –––17K
20,000 –––20K
22,000 –––22K
25,000 –––25K
30,000 –––30K
33,000 –––33K
35,000 –––35K
40,000 –––40K
50,000 –––50K
68 –––68R
75 –––75R
82 –––82R
100 –––100
120 –––120
125 –––125
150 –––150
180 –––180
200 –––200
220 –––220
225 –––225
250 –––250
270 –––270
300 –––300
330 –––330
350 –––350
390 –––390
400 –––400
450 –––450
470 –––470
500 –––500
560 –––560
600 –––600
680 –––680
750 –––750
800 –––800
820 –––820
900 –––900
1,000 –––1K0
1,100 –––1K1
1,200 –––1K2
1,500 –––1K5
1,800 –––1K8
2,000 –––2K0
Ohmic value
41F––– 1
43F––– 3
45F––– 5
40F––– 10
41J––– 1
42J––– 2
43J––– 3
45J––– 5
40J––– 10
1% Tolerance 5% Tolerance
Wattage and Tolerance
Part No.
Prefix
Suffix
41NJR10E
40 Series
Ohmicone®
Silicone Ceramic
Conformal Axial
Term. Wirewound
Resistance Value
R10= 0.10Ω
1R0= 1.0Ω
10R = 10.0Ω
250 = 250Ω
1K0= 1,000Ω
4K5= 4,500Ω
50K = 50,000Ω
Tolerance
F= 1%
J= 5%
RoHS
Compliant
Wattage
1= 1W
2
3
5
7
0=10W
Non-Inductive
Winding
Optional (blank
= std. winding)
ORDERING INFORMATION
40 Series
Ohmicone® Silicone-Ceramic Conformal
Axial Terminal Wirewound
1% and 5% Tolerance Standard
Standard part numbers
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
86
Commercial Grade Military Grade Watts Ohms Voltage
81F RW70U 1 0.1-6K 150
82 2 0.1-8K 100
83F RW79U 3 0.1-20K 200
83J RW69V
85F RW74U 5 0.1-75K 460
85J RW67V
80F RW78U 10 0.1-150K 1000
80J RW68V
Non-Inductive versions available. Insert “N” before tolerance code. Example: 83NF2K21
LD
1.5 in. / 38.1mm
Ohmite’shighestqualityconformalaxialterminal
silicone-ceramic coated resistors for applications
requiringhighprecisionandstability.Theseresistors
have a low temperature coefficient and maintain a
high degree of stability under demanding conditions.
Coating Silicone-ceramic
Core Ceramic
Terminals Solder-coated copper clad axial
Derating Linearly from 100% @ +25°C to 0% @ +275°C.
Tolerance ±5% (J type), ±1% (F type) (other tolerances available)
Power rating Based on 25°C free air rating
Maximum ohmic values See chart
Overload Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times
rated wattage for 5 seconds
Temperature coefficient Under 1Ω; ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
10Ω and over; ±20 ppm/°C
Dielectric withstanding voltage 500 VAC: 1 watt rating; 1000 VAC: 2, 3, 5, 7, and 10 watt rating
FEATURES
•Designedforprecisionpowerapplications
•All-weldedconstruction
•RWSeries“Mil”valueresistorsmarkedwith
“Mil”inaccordancewithMIL-R-26specifica-
tions
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
(in./mm max.) Watts Length Diam. Lead gauge
81F RW70U 1 0.437 / 11.1 0.125 / 3.2 24
82 2 0.406 / 10.3 0.219 / 5.6 20
83F RW79U 3 0.593 / 15.1 0.218 / 5.5 20
83J RW69V
85F RW74U 5 0.937 / 23.8 0.343 / 8.7 18
85J RW67V
80F RW78U 10 1.842 / 46.8 0.406 /10.3 18
80J RW68V
80 Series
Commercial Grade Acrasil®‚ Silicone-Ceramic
Conformal Axial Terminal Wirewound
1% Tolerance (5% available)
RW Series
Military Grade 80 Series MIL-R-26 Qualified
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 87
Commercial Grade (80 Series) Part Numbers
0.1 –––R10
0.11 –––R11
0.121 –––R121
0.133 –––R133
0.15 –––R15
0.162 –––R162
0.182 –––R182
0.2 –––R20
0.221 –––R221
0.249 –––R249
0.274 –––R274
0.301 –––R301
0.332 –––R332
0.374 –––R374
0.392 –––R392
0.402 –––R402
0.453 –––R453
0.499 –––R499
0.511 –––R511
0.562 –––R562
0.619 –––R619
0.681 –––R681
0.75 –––R75
0.825 –––R825
0.909 –––R909
1 –––1R0
1.1 –––1R1
1.21 –––1R21
1.330 –––1R33
1.5 –––1R5
1.62 –––1R62
1.82 –––1R82
2 –––2R0
2.21 –––2R21
2.49 –––2R49
2.74 –––2R74
3.01 –––3R01
3.32 –––3R32
3.74 –––3R74
4.02 –––4R02
4.53 –––4R53
4.99 –––4R99
5.11 –––5R11
5.62 –––5R62
6.19 –––6R19
6.81 –––6R81
7.5 –––7R5
8.25 –––8R25
9.09 –––9R09
10 –––10R
11 –––11R
12.1 –––12R1
13.3 –––13R3
15 –––15R
16.2 –––16R2
18.2 –––18R2
20 –––20R
22.1 –––22R1
24.9 –––24R9
27.4 –––27R4
30.1 –––30R1
33.2 –––33R2
37.4 –––37R4
40.2 –––40R2
45.3 –––45R3
49.9 –––49R9
51.1 –––51R1
56.2 –––56R2
61.9 –––61R9
68.1 –––68R1
75 –––75R
82.5 –––82R5
90.9 –––90R9
100 –––100
110 –––110
121 –––121
133 –––133
150 –––150
162 –––162
182 –––182
200 –––200
221 –––221
249 –––249
274 –––274
301 –––301
332 –––332
374 –––374
402 –––402
453 –––453
499 –––499
511 –––511
562 –––562
619 –––619
681 –––681
750 –––750
825 –––825
909 –––909
1,000 –––1K0
1,100 –––1K1
1,210 –––1K21
1,330 –––1K33
1,500 –––1K5
1,620 –––1K62
1,820 –––1K82
2,000 –––2K0
2,210 –––2K21
2,490 –––2K49
2,740 –––2K74
3,010 –––3K01
3,320 –––3K32
3,740 –––3K74
4,020 –––4K02
4,530 –––4K53
4,990 –––4K99
5,110 –––5K11
5,620 –––5K62
6,190 –––6K19
6,810 –––6K81
7,500 –––7K5
8,250 –––8K25
9,090 –––9K09
10,000 –––10K
10,500 –––10K5
11,000 –––11K
12,100 –––12K1
13,300 –––13K3
15,000 –––15K
16,200 –––16K2
18,200 –––18K2
20,000 –––20K
22,100 –––22K1
24,900 –––24K9
27,400 –––27K4
30,100 –––30K1
33,200 –––33K2
37,400 –––37K4
38,300 –––38K3
40,200 –––40K2
45,300 –––45K3
49,900 –––49K9
51,100 –––51K1
56,200 –––56K2
61,900 –––61K9
68,100 –––68K1
75,000 –––75K
82,500 –––82K5
90,900 –––90K9
100,000 –––100K
150,000 –––150K
200,000 –––200K
=Standardvalues
=Non-standardvalues
subject to minimum
handling charge per
item
Shaded values involve
very fine resistance wire
and should not be used
in critical applications
without burn-in and/or
thermal cycling.
Ohmic value
81F––– 1
83F––– 3
85F––– 5
80F––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
81F––– 1
83F––– 3
85F––– 5
80F––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
81F––– 1
83F––– 3
85F––– 5
80F––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
81F––– 1
83F––– 3
85F––– 5
80F––– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
85F––– 5
80F––– 10
Wattage
Part No.
Prefix
Suffix
81NJR10
80 Series
Acrasil®
Silicone Ceramic
Conformal Axial
Term. Wirewound
Resistance Value
R10 = 0.10Ω
1R0 = 1.0Ω
10R = 10.0Ω
250 = 250Ω
1K0 = 1,000Ω
4K5 =4,500Ω
50K = 50,000Ω
Tolerance
F= 1%
J= 5%
Wattage
1= 1W
2
3
5
0=10W
Non-Inductive Winding
Optional (blank = std. winding)
Commercial Grade
RW Series
Military grade
Resistance Value
R100 = 0.1�
1R00 = 1.0�
10R0 = 10.0�
1000 = 100�
1001 = 1000�

Tolerance
F= 1%
J= 5%
1002 = 10K�
1503 = 150K�
Military Grade This product will
not be made avail-
able as RoHS
Compliant.
For RoHS
Compliant equiva-
lent, see 40 Series.
ORDERING INFORMATION
80 Series
Commercial Grade Acrasil®‚ Silicone-Ceramic
Conformal Axial Terminal Wirewound
1% Tolerance (5% available)
RW Series
Military Grade 80 Series MIL-R-26 Qualified
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88
Coating Molded lead free vitreous enamel
Core Ceramic
Terminals Solder-coated copper clad axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance ±5% (other tolerances available)
Power rating Based on 25°C free air rating (other wattages available*)
Maximum ohmic values See chart
Overload Under 11 watts: 5 times rated wattage for 5 seconds. 11 watts: 10 times rated wattage for 5 seconds
Temperature coefficient 1 to 9.99Ω: ±100 ppm/°C; 10Ω and over: ±30 ppm/°C
Dielectric withstanding voltage 500 VAC: 1W rating; 1000 VAC: 2, 3, 5 and 11W
90 Series
Lead Free Vitreous Enamel Molded
Axial Term. Wirewound, 5% Tolerance Standard
Series Wattage* Ohms Voltage
91 1.5 0.1Ω-3.6K 150
92 2.25 0.1Ω-3.5K 85
93 3.25 0.1Ω-10.5K 200
95 5.0 0.1Ω-25K 495
96 6.5 0.1Ω-50K 625
90 11.0 0.1Ω-91K 1080
*2xpowerratingsbyusingheat-sinkmountingclipsshownonfollowingpage.
Note:Duetospacerestrictions,partsarestampedwithwattageratingsreducedtothe
nearest whole number. The actual wattage ratings are as published in this catalog.
Series Wattage Length Diameter Lead gauge
91 1.5 0.452 / 11.5 0.140 / 3.6 24
92 2.25 0.405 / 10.3 0.219 / 5.6 20
93 3.25 0.577 / 14.7 0.234 / 5.9 20
95 5.0 0.968 / 24.6 0.265 / 6.7 20
96 6.5 0.952 / 24.2 0.343 / 8.7 20
90 11.0 1.811 / 46.0 0.343 / 8.7 20
LD
1.5 in. / 38.1mm
Whenyouneedthehighestqualitywirewoundaxial
terminal resistors available, choose Ohmite’s 90
Series resistors.
Theyaremanufacturedbyauniqueprocessthat
molds the vitreous enamel over the resistive ele-
ment, helping to ensure consistent dimensions.
This uniformity permits 90 Series resistors to be
mounted in clips, creating a heat-sinking benefit (see
next page).
The durable vitreous enamel coating, which is totally
lead free, permits the 90 Series resistors to maintain
a hard coating while operating at high temperatures.
Mechanical integrity is enhanced by the all-welded
construction.
FEATURES
•MoldedConstructionprovidesconsistentshape
andsize(Permitsmountinginclipswhichextends
power rating).
•MeetsMIL-R-26requirementsforinsulatedresis-
tors.
•All-weldedconstruction.
•Flameresistantleadfreevitreousenamelcoating.
•Higherratingsinsmallersizes.
•Heatsinkmountingclipsavailable.
•RoHScompliant;add“E”suffixtopartnumberto
specify.
CHARACTERISTICS
SERIES SPECIFICATIONS
DIMENSIONS
(in./mm max.)
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 89
Standard part numbers for mounting clip
FEATURES
•Preventsseverevibrationormechanicalshocktoresistor
•Increasesresistorwattageupto100%whenmountedonmetalsurface(1.5
sq.in.by0.040in.thickmin.perwattdissipated)
•Holesinclipbasepermitfasteningtochassissurfacewithmachinescrews,
eyelets or rivets
•Soldinbagsoften(10)
MOUNTING CLIP
Resistor Clip Clip Clip Hole Hole
rating length width height No. of centers diameter
Part No. (watts) (in./mm) (in./mm) (in./mm) holes (in./mm) (in./mm)
5900 1.5 0.40 / 10.319 0.150 / 3.810 0.250 / 6.350 1 0.71 / 1.803
5902 2.25 0.35 / 8.890 0.217 / 5.500 0.275 / 6.980 2 0.156 / 3.969 0.71 / 1.803
5904 3.25 0.50 / 12.700 0.257 / 6.500 0.319 / 8.103 2 0.250 / 6.350 0.093 / 2.362
5906 5.0 0.90 / 22.860 0.237 / 6.019 0.284 / 7.214 2 0.400 / 10.160 0.103 / 2.616
5908 11.0 1.75 / 44.450 0.333 / 8.458 0.377 / 9.576 2 0.800 / 20.320 0.103 / 2.616
=Mostpopularstandardvalues
=Standardvalues
=Non-standardvaluessubjectto
minimum handling charge per
item
Standard part numbers for 90 series
1 –––1R0
1.1 –––1R1
1.2 –––1R2
1.3 –––1R3
1.5 –––1R5
1.6 –––1R6
1.8 –––1R8
2 –––2R0
2.2 –––2R2
2.4 –––2R4
2.7 –––2R7
3 –––3R0
3.3 –––3R3
3.6 –––3R6
3.9 –––3R9
4 –––4R0
4.3 –––4R3
4.7 –––4R7
5 –––5R0
5.1 –––5R1
5.6 –––5R6
6.2 –––6R2
6.8 –––6R8
7.5 –––7R5
8.2 –––8R2
9.1 –––9R1
10 –––10R
11 –––11R
12 –––12R
13 –––13R
15 –––15R
16 –––16R
18 –––18R
20 –––20R
22 –––22R
24 –––24R
25 –––25R
27 –––27R
30 –––30R
33 –––33R
35 –––35R
36 –––36R
39 –––39R
40 –––40R
43 –––43R
47 –––47R
50 –––50R
51 –––51R
56 –––56R
62 –––62R
68 –––68R
75 –––75R
82 –––82R
91 –––91R
100 –––100
110 –––110
120 –––120
130 –––130
150 –––150
160 –––160
180 –––180
200 –––200
220 –––220
240 –––240
250 –––250
270 –––270
300 –––300
330 –––330
350 –––350
360 –––360
390 –––390
400 –––400
430 –––430
450 –––450
470 –––470
500 –––500
510 –––510
560 –––560
600 –––600
620 –––620
680 –––680
700 –––700
750 –––750
800 –––800
820 –––820
900 –––900
910 –––910
1,000 –––1K0
1,100 –––1K1
1,200 –––1K2
1,300 –––1K3
1,400 –––1K4
1,500 –––1K5
1,600 –––1K6
1,800 –––1K8
2,000 –––2K0
2,200 –––2K2
2,400 –––2K4
2,500 –––2K5
2,700 –––2K7
3,000 –––3K0
3,300 –––3K3
3,500 –––3K5
3,600 –––3K6
3,900 –––3K9
4,000 –––4K0
4,300 –––4K3
4,500 –––4K5
4,700 –––4K7
5,000 –––5K0
5,100 –––5K1
5,600 –––5K6
6,000 –––6K0
6,200 –––6K2
6,800 –––6K8
7,000 –––7K0
7,500 –––7K5
8,000 –––8K0
8,200 –––8K2
9,000 –––9K0
9,100 –––9K1
10,000 –––10K
11,000 –––11K
12,000 –––12K
13,000 –––13K
14,000 –––14K
15,000 –––15K
16,000 –––16K
17,000 –––17K
18,000 –––18K
20,000 –––20K
22,000 –––22K
24,000 –––24K
25,000 –––25K
27,000 –––27K
30,000 –––30K
33,000 –––33K
35,000 –––35K
36,000 –––36K
39,000 –––39K
40,000 –––40K
43,000 –––43K
45,000 –––45K
47,000 –––47K
50,000 –––50K
51,000 –––51K
=Standardvalues
=Non-standardvaluessubjecttominimumhandling
charge per item
Shaded values involve very fine resistance wire and
should not be used in critical applications without burn-
in and/or thermal cycling.
Ohmic value
95J––– 5
90J––– 11
Wattage
Part No.
Prefix
Suffix
Ohmic value
93J––– 3.25
95J––– 5
90J––– 11
Wattage
Part No.
Prefix
Suffix
Ohmic value
91J––– 1.5
92J––– 2.25
93J––– 3.25
95J––– 5
90J––– 11
Wattage
Part No.
Prefix
Suffix
Ohmic value
91J––– 1.5
92J––– 2.25
93J––– 3.25
95J––– 5
90J––– 11
Wattage
Part No.
Prefix
Suffix
Ohmic value
91J––– 1.5
92J––– 2.25
93J––– 3.25
95J––– 5
90J––– 11
Wattage
Part No.
Prefix
Suffix
91NJR10E
90 Series
Series-Lead
Free Vitreous
Enamel Molded
Axial Term.
Wirewound
Resistance Value
1R0 = 1.0Ω
10R = 10.0Ω
250= 250Ω
1K0 = 1,000Ω
4K5 = 4,500Ω
51K =51,000Ω
Tolerance
J= 5%
Wattage
1= 1.5W
2= 2.25W
3= 3.25W
5=5W
0=11W
Non-Inductive Winding
Optional (blank = std. winding) RoHS
Compliant
ORDERING INFORMATION
90 Series
Lead Free Vitreous Enamel Molded
Axial Term. Wirewound,
5% Tolerance Standard
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
90
Axiohm
Centohm Coated
Axial Terminal Wirewound
Coating Flameproof proprietary Centohm
Core Ceramic
Element Copper-nickel alloy or nickel-chrome alloy depending on
resistance value
End Cap Stainless steel
Terminals Tinned Copper weld. RoHS solder composition is 96% Sn,
3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C.
Tolerance ±5% (Std) down to 0.1% available.
Power rating Based on 25°C free air rating (other wattages available).
Overload Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts
and over: 10 times rated wattage for 5 seconds.
Temperature coefficient ±30ppm /°C above 10Ω
±100ppm/°C 1 to 10Ω
±200ppm/°C below 1Ω
Watt Resistance Standard Dielectric Maximum
Rating Range (Ω) Resistance Withstanding Voltage
Form Min. Max. Tolerance Voltage Rating
1C 0.1 4K ±5% 500 100
2C 0.1 10K ±5% 500 300
3C 0.1 20K ±5% 500 450
4C 0.1 30K ±5% 500 600
5C 0.1 40K ±5% 500 800
7C 0.1 50K ±5% 500 875
10C 0.1 90K ±5% 500 1600
Ohmite’s Axiohm resis-
tors are Centohm coated
for maximum reliability.
These all-welded units
arecharacterizedbytheir
low temperature coef-
ficients and resistance to
thermal shock, making
them ideal for a wide
range of electrical and
electronic applications.
FEATURES
•Weldedconstruction
•Inorganicandnon-hygroscopic,
Centohm coating seals and protects
the resistance wire.
•ExceedsMIL-R-26moisturerequire-
ments
•CentohmResistorsaredesignedto
meet and exceed performance charac-
teristics of vitreous enamel resistors.
•Centohmismorecosteffectivethan
vitreous enamel.
•±5%resistancetolerance
OPTIONS
Noninductive: This specially
designed version is wound using
the Ayrton-Perry method.
Resistance Tolerances: Options
include 5%, 1%, 0.5%, 0.25%, and
0.1% resistors.
Terminal Sizes: Alternate terminal
diameters available.
Tape and Reel: Resistors taped for
automatic insertion. Contact Ohmite
forsize,quantityandorderinginfor-
mation
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 91
Wattage Coating
"C" for
Centohm
Example:
Std 3 watt,
10K ± 5% = 3CJ10K
Non-Inductive
Option (Add N)
Tolerance
J = 5% (standard)
H = 3%
F = 1%
D = .5%
Q = .25%
B = .1%
Resistance (Ω)
use "K" for 1000
multiplier; use "R"
for decimal point
E = RoHS compliant
Watt C D max.
Rating A B Wire Gauge clean term. to clean
Form ±.063”/±1.60mm ±.031”/0.79mm (dia.) term. in./mm
1C 0.313±.031 / 7.95±.79 0.094 / 2.39 #24 (.020”) 0.406 / 10.31
2C 0.375 / 9.53 0.219 / 5.56 #20 (.032”) 0.469 / 11.91
3C 0.5 / 12.7 0.219 / 5.56 #20 (.032”) 0.594 / 15.09
4C 0.688 / 17.48 0.219 / 5.56 #20 (.032”) 0.813 / 20.65
5C 0.938 / 23.83 0.219 / 5.56 #20 (.032”) 1.063 / 27.00
7C 1 / 25.4 0.313 / 7.95 #20 (.032”) 1.125 / 28.58
10C 1.563 / 39.7 0.313 / 7.95 #20 (.032”) 1.688 / 42.67
AB
1.5 in. / 38.1mm C
D
Test Maximum
Temperature Coefficient ±30ppm/°C above 10Ω
±100ppm/°C 1 to 10Ω
±200ppm/°C below 1Ω
Thermal Shock ± (2% + .05Ω)∆R
Short Time Overload ± (2% + .05Ω)∆R
Dielectric ± (0.1% + .05Ω)∆R
Low Temperature Storage ± (2% + .05Ω)∆R
High Temperature Exposure ± (2% + .05Ω)∆R
Moisture Resistance ± (2% + .05Ω)∆R
Shock ± (2% + .05Ω)∆R
Vibration ± (2% + .05Ω)∆R
Load Life ± (3% + .05Ω)∆R
Terminal Strength ± (1% + .05Ω)∆R
DIMENSIONS
(in./mm)
ORDERING INFORMATION
PERFORMANCE DATA
Axiohm
Centohm Coated
Axial Terminal Wirewound
∆R values are maximums based on
MIL-R-26 testing requirements at
350°C.
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92
OD/OF/OA Series
Little Demon® Carbon Composition Molded
OD/OF Series (5% Tol.) OA Series (10%)
Series Wattage Ohms Tolerance Max. Voltage Dielectric VAC
OD 0.25 2.2-5.6M ±5% 250 500
OF 0.50 2.2-20M ±5% 350 700
OA 1.00 2.2-1M ±10% 500 1000
Series Length max. Diam. max. Lead Dia.
OD 0.276 / 7.0 0.098 / 2.5 0.024/0.60
OF 0.406 /10.3 0.150 / 3.8 0.028/0.70
OA 0.591 /15.0 0.236 / 6.0 0.035/0.92
LD
1.135" ±0.12 / 28.83mm ±3
(OA: 1.18" / 30.0mm)
Terminals Solder-coated copper terminal.
Body Molded Phenolic
Tolerance ±5% (OD/OF); ±10% (OA)
Derating Linearly from 100% @ +70°C to 0% @ 130°C
1
10
Pulse Power (W)
100
1,000
10,000
100,000
Pulse width (s)
110-1
10-2
10-3
10-4
10-5
10-6
10-7
Single Pulse Power Capability
OF
OD
Ohmite’sLittleDemonsaresmall,reliablecarbon
composition resistors with exceptional strength.
They are made tough by a molding process that
combines the terminals, insulation and resistive ele-
ment into an integrated unit. Along with their small
size,LittleDemonsperformwithlownoise,dissipate
heat rapidly and offer high temperature stability.
Color codes are readable even after prolonged use
thanks to a very durable coating that resists abra-
sions and chipping normally associated with auto-
maticinsertionequipment.
FEATURES
•Moldedinsulationforhighdielectricstrength
•Ruggedconstruction
•Highsurgecapabilities
•Comparableto“Mil”RC07,RC20,andRC32types
•OD/OFSeriesavailableinE24values
•OASeriesavailableinE12values
SERIES SPECIFICATIONS
CHARACTERISTICS
DIMENSIONS
(continued)
Discontinuance Notice: OA series
is not recommended for new de-
signs. The OA series will no longer
be available for new orders after
8-30-14. After this date existing
stock will be sold until depleted.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 93
Tape/Reel OD OF
Qty./reel 5000 3000
Reel size (mm) 260 260
Qty./carton 40,000 24,000
Gross carton wt. (kg) 12 13
Carton size (m3) 0.04 0.04
Ammo Box OD OF
Tape width (mm) 52 52
Qty./box 2000 2000
Qty./carton 30,000 30,000
Gross carton wt. (kg) 10 16
Carton size (m3) 0.03 0.05
75mm ±5
60mm ±5 (OD)
65mm ±5 (OF)
275mm ±5 (OD)
455mm ±5 (OF)
52.4mm +1.6
-1.4
6mm ±.5
5.08mm ±.38
0.5mm max.
L1L2
L1 – L2 = 1mm max.
1mm max.
3.2mm min.
280mm
(ref.)
260mm
±5
60.4mm±1
14.5mm ±.5
3mm
75mm ±5
60.4mm ±1
OD/OF/OA Series
Little Demon® Carbon Composition Molded
OD/OF Series (5% Tol.) OA Series (10%)
PACKAGING
RESISTOR USE GUIDELINES
BAKE PROCEDURE
ORDERING INFORMATION
A. Heat Treatment
110°C±10°C
15 hours
B. Frequency of
heat treatment
1 time only
Carbon composition resistors are manufactured by extruding
a blend of carbon and organic binders inside a phenolic outer
body. The extrusion is cut to length, leads inserted, cured,
and marked to form a finished resistor. The carbon and binder
mixture is adjusted to produce different resistance values. The
resistors are sorted for 5%, 10%, and 20% tolerance values.
Carbon composition resistors are able to withstand larger
short-term pulses and higher voltages than film resistors and
arevirtuallyimpervioustoESDevents(Electro-staticdis-
charge). Carbon composition resistors are also sensitive to
moisture and, therefore, storage recommendations should be
adheredto.Generally,anymoistureabsorbedduringstorage
willbe"bakedout"duringthesolderingoperation.Iftheprod-
uct is stored properly the resistance shift during the soldering
operation will be minimal, less than 2% or 3%.
Carbon composition resistors are highly hygroscopic and
changes in resistance value can occur if too much moisture is
absorbed.Forthisreason,itisrecommendednottousewater
or water-soluble solvents to clean these components. Alcohol
or hydrocarbon solvents are recommended for rinsing.
All resistors are packaged in sealed poly bags with desiccant
tomaintainaconsistenthumidityduringstorage.Ifpartsare
removed from the protective plastic bag they should be used
as soon as possible or resealed in the plastic bag.
Storage: Ohmite recommends storing carbon composition
resistorsinacontrolledenvironmentatatemperatureof5°to
35°Candrelativehumidityoflessthan60%.Inventoryshould
always be used on a first-in-first-out basis.
D. Cautions
Solderability: maybeaffectedduetooxidizationofleadwire
Resistance value: some units may not completely recover to
original value.
Soldering heat: some treated product may have substantial
resistancechangeduringsolderingoperation.Itisrecom-
mended that parts be tested to evaluate soldering heat
effects.
C. Solder heat test after treatment
Solder Dip
Type Temp. Time Evaluation
OD 300°C 3sec within±3%
OF 350°C 3sec within±3%
*DepthofImmersion:3mmfromtheresistor
body
•OD/OFSeriesavailableinE24values
•OASeriesavailableinE12values
Series
OD
OF
OA
Tolerance
OD, OF:J=5%
OA: K = 10%
Ohms
68G = 6.8
680 =68
681 = 680
682 = 6,800
683 = 68,000
684 = 680,000
RoHS compliant
OD683JE-TR
Tape & reel
optional
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94
CHARACTERISTICS
SERIES SPECIFICATIONS
Little Rebel®
Carbon Film Resistors, 5% Tolerance
Available in E24 Ohmic values
Series Wattage Ohms Max. Working Voltage
OJ 0.125 1.0- 1M 200
OK 0.250 1.0-10M 250
OL 0.500 1.0-10M 350
OM 1.00 1.0-10M 500
ON 2.00 1.0-10M 500
*Available in Cabinet Assortments
LittleRebelsareoneofOhmite’smoreeconomical
lines of low wattage resistors. Constructed of a pure
carbon film deposited on a high-grade ceramic body,
these units offer better stability performance than
comparable carbon composition resistors.
LittleRebelsaredesignedforelectricalandelectronic
applicationsthatdemandsmallsizesandsmallpower
ratings plus high performance and reliability.
FEATURES
•Highstability,lownoiselevel,longlife.
•Idealforapplicationsrequiringasteadylowpower
drop.
•AvailableinResistorCabinetAssortments.
•24Valuesperdecade.
Core High-grade ceramic.
Terminals Solder-coated copper lead.
Derating Linearly from 100% @ +70°C to 0% @ 155°C.
Tolerance ±5%.
Temperature
Coefficient
1Ω to 10: ±350 ppm/°C
11Ω to 91K: -450 ppm/°C
100K to 1M: -700 ppm/°C
1.1M to 10M: -800 to 1500 ppm/°C
Maximum
Overload Voltage
OJ: 400 Volts
OK: 500 Volts
OL: 700 Volts
OM: 1000 Volts
ON: 1000 Volts
Quantity per reel OJ: 5000
OK: 5000
OL: 4000
OM: 2500
ON: 1000
DIMENSIONS
(iin./mm)
LD
1.102" /
28.00mm
Series Wattage Max. Length Max. Diam. Lead ga.
OJ 0.125 0.138 / 3.5 0.073 / 1.85 24
OK 0.250 0.268 / 6.8 0.099 / 2.5 22
OL 0.500 0.355 / 9.0 0.118 / 3.0 22
OM 1.00 0.473 /12.0 0.197 / 5.0 20
ON 2.00 0.630 / 16.0 0.217 / 5.5 20
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 95
ORDERING INFORMATION
Standard part numbers for standard resistance values
Ohmic value
OJ––– 0.125
OK––– 0.25
Wattage
Part No.
Prefix
Suffix
OL––– 0.50
OM––– 1.0
ON––– 2.0
Ohmic value
OJ––– 0.125
OK––– 0.25
Wattage
Part No.
Prefix
Suffix
OL––– 0.50
OM––– 1.0
ON––– 2.0
Ohmic value
OJ––– 0.125
OK––– 0.25
Wattage
Part No.
Prefix
Suffix
OL––– 0.50
OM––– 1.0
ON––– 2.0
Ohmic value
OJ––– 0.125
OK––– 0.25
Wattage
Part No.
Prefix
Suffix
OL––– 0.50
OM––– 1.0
ON––– 2.0
62 –––6205
68 –––6805
75 –––7505
82 –––8205
91 –––9105
100 –––1015
110 –––1115
120 –––1215
130 –––1315
150 –––1515
160 –––1615
180 –––1815
200 –––2015
220 –––2215
240 –––2415
270 –––2715
330 –––3315
350 –––3515
360 –––3615
390 –––3915
430 –––4315
470 –––4715
510 –––5115
560 –––5615
620 –––6215
680 –––6815
750 –––7515
820 –––8215
910 –––9115
1,000 –––1025
1,100 –––1125
1,200 –––1225
1,300 –––1325
1,500 –––1525
1,600 –––1625
1,800 –––1825
2,000 –––2025
2,200 –––2225
2,400 –––2425
2,700 –––2725
3,000 –––3025
3,300 –––3325
3,600 –––3625
1 –––10G5
1.1 –––11G5
1.2 –––12G5
1.3 –––13G5
1.5 –––15G5
1.6 –––16G5
1.8 –––18G5
2.0 –––20G5
2.2 –––22G5
2.4 –––24G5
2.7 –––27G5
3.0 –––30G5
3.3 –––33G5
3.6 –––36G5
3.9 –––39G5
4.3 –––43G5
4.7 –––47G5
5.1 –––51G5
5.6 –––56G5
6.2 –––62G5
6.8 –––68G5
7.5 –––75G5
8.2 –––82G5
9.1 –––91G5
10 –––1005
11 –––1105
12 –––1205
13 –––1305
15 –––1505
16 –––1605
18 –––1805
20 –––2005
22 –––2205
24 –––2405
27 –––2705
30 –––3005
33 –––3305
36 –––3605
39 –––3905
43 –––4305
47 –––4705
51 –––5105
56 –––5605
3,900 –––3925
4,300 –––4325
4,700 –––4725
5,100 –––5125
5,600 –––5625
6,200 –––6225
6,800 –––6825
7,500 –––7525
8,200 –––8225
9,100 –––9125
10,000 –––1035
11,000 –––1135
12,000 –––1235
13,000 –––1335
15,000 –––1535
16,000 –––1635
18,000 –––1835
20,000 –––2035
22,000 –––2235
24,000 –––2435
27,000 –––2735
30,000 –––3035
33,000 –––3335
36,000 –––3635
39,000 –––3935
43,000 –––4335
47,000 –––4735
51,000 –––5135
56,000 –––5635
62,000 –––6235
68,000 –––6835
75,000 –––7535
82,000 –––8235
91,000 –––9135
100,000 –––1045
110,000 –––1145
120,000 –––1245
130,000 –––1345
150,000 –––1545
160,000 –––1645
180,000 –––1845
200,000 –––2045
220,000 –––2245
240,000 –––2445
270,000 –––2745
300,000 –––3045
330,000 –––3345
360,000 –––3645
390,000 –––3945
430,000 –––4345
470,000 –––4745
510,000 –––5145
560,000 –––5645
620,000 –––6245
680,000 –––6845
750,000 –––7545
820,000 –––8245
910,000 –––9145
1MEG –––1055
1.1MEG –––1155
1.2MEG –––1255
1.3MEG –––1355
1.5MEG –––1555
1.6MEG –––1655
1.8MEG –––1855
2.0MEG –––2055
2.2MEG –––2255
2.4MEG –––2455
2.7MEG –––2755
3.0MEG –––3055
3.3MEG –––3355
3.6MEG –––3655
3.9MEG –––3955
4.3MEG –––4355
4.7MEG –––4755
5.1MEG –––5155
5.6MEG –––5655
6.2MEG –––6255
6.8MEG –––6855
7.5MEG –––7555
8.2MEG –––8255
9.1MEG –––9155
10MEG –––1065
OJ1035E-R52
Packaging Code
R52 = Tape & Reel 52mm
(except ON: R58 = Tape & Reel 58mm)
A52(26) = Ammo Pac 52mm (26mm)
Ohms
3 Digit IEC Code
("G" as 3rd digit = 0.1)
11G=1.1Ω
101=100Ω
102=1000Ω
103=10,000Ω
104=100,000Ω
105=1 MΩ
106=10 MΩ
Tolerance
5 = 5% (Std.)
1 = 10%
Series
Selected from
Specification
Chart
RoHS
Compliant
Little Rebel®
Carbon Film Resistors, 5% Tolerance
Available in E24 Ohmic values
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
96
TWM/TWW Series
Ceramic Housed Radial Terminal Power
Series Wattage Resistance Voltage Element
TWW3 3 0.01-39Ω 250 Wire
TWW5 5 0.01-47Ω 350 Wire
TWW10 10 0.04-990Ω 750 Wire
TWM3 3 43-50KΩ 250 Metal oxide
TWM5 5 51-50KΩ 350 Metal oxide
TWM10 10 1000-50KΩ 750 Metal oxide
Derating
100
Percent Rated Watts
Ambient Temperature, oC
60
20
0275
80
40
100 200 25070 150
Housing Ceramic
Core Fiberglass
Filling Cement based
Tolerance 5% standard
Temperature coefficient 0.01-20Ω ±400ppm/°C;
>20-10Ω ±350ppm/°C
Dielectric withstanding voltage 1,000VAC
Short time overload TWW: 10x rated power for 5 sec.;
TWM: 5x rated power for 5 sec.
Operating Temperature -55°C to 275°C
Storage Temperature 15℃-35℃, humidity: 25%-75%
The TWM/TWW series radial terminal power resis-
tors offer significant board space savings over axial
terminalproducts.Generatedheatisalsokeptaway
from the circuit board.
They are recommended for commercial applica-
tionsrequiringlowcost.
FEATURES
•EconomicalCommercialGradeforgeneralpurpose
use
•WirewoundandMetalOxideconstruction
•Wideresistancerange
•Flameproofinorganicconstruction
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 97
Standard part numbers for TWM seriesStandard part numbers for TWW series
Ohmic value
TWM3J– 3
TWM5J– 5
TWM10J– 10
Wattage
Part No.
Prefix
Suffix
43 ––– 43RE
47 ––– 47RE
56 ––– 56RE
68 ––– 68RE
75 ––– 75RE
82 ––– 82RE
100 ––– 100E
150 ––– 150E
200 ––– 200E
270 ––– 270E
300 ––– 300E
330 ––– 330E
390 ––– 390E
430 ––– 430E
470 ––– 470E
560 ––– 560E
680 ––– 680E
0.01 –––R01E
0.02 –––R02E
0.03 –––R03E
0.04 –––R04E
0.05 –––R05E
0.10 –––R10E
0.15 –––R15E
0.20 –––R20E
0.27 –––R27E
0.30 –––R30E
0.33 –––R33E
0.39 –––R39E
0.43 –––R43E
0.47 –––R47E
0.56 –––R56E
0.68 –––R68E
0.75 –––R75E
0.82 –––R82E
1.0 –––1R0E
1.5 –––1R5E
2.0 –––2R0E
2.7 –––2R7E
3.0 –––3R0E
3.3 –––3R3E
3.9 –––3R9E
4.3 –––4R3E
4.7 –––4R7E
5.6 –––5R6E
6.8 –––6R8E
7.5 –––7R5E
8.2 –––8R2E
10 –––10RE
15 –––15RE
20 –––20RE
22 –––22RE
27 –––27RE
30 –––30RE
33 –––33RE
39 –––39RE
43 –––43RE
47 –––47RE
56 –––56RE
68 –––68RE
75 –––75RE
82 –––82RE
100 –––100E
150 –––150E
200 –––200E
270 –––270E
300 –––300E
330 –––330E
390 –––390E
430 –––430E
470 –––470E
560 –––560E
680 –––680E
750 –––750E
820 –––820E
750 ––– 750E
820 ––– 820E
1000 –––1K0
1500 –––1K5
2000 –––2K0
2700 –––2K7
3000 –––3K0
3300 –––3K3
3900 –––3K9
4300 –––4K3
4700 –––4K7
5600 –––5K6
6800 –––6K8
7500 –––7K5
8200 –––8K2
10000 –––10K
Ohmic value
TWW3J– 3
TWW5J– 5
TWW10J– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
TWW3J– 3
TWW5J– 5
TWW10J– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
TWW3J– 3
TWW5J– 5
TWW10J– 10
Wattage
Part No.
Prefix
Suffix
Ohmic value
TWM3J– 3
TWM5J– 5
TWM10J– 10
Wattage
Part No.
Prefix
Suffix
Series
TWM= Ceramic housed
metal oxide radial
TWW= Ceramic housed
wirewound radial
Tolerance
J = 5%
Resistance Value
Example:
R05=0.05Ω
R56=0.56Ω
1R0=1Ω
8R2=8.2Ω
270 = 270Ω
1K0= 1,000Ω
8K2= 8,200Ω
10K =10,000Ω
TWW3JR05E
Wattage
3
5
10
E = RoHS compliant
0.20"±.08
5mm ±2
H
W
0.20" ±.04
5mm ±120
gauge
0.49" ±.04
12.5mm ±1
(marked
surface)
Height Width
Series (in./mm) ±1mm
TWW3 0.98 / 25 0.33 / 8.5
TWW5 0.98 / 25 0.35 / 9
TWW10 1.97 / 50 0.35 / 9
TWM3 0.98 / 25 0.33 / 8.5
TWM5 0.98 / 25 0.35 / 9
TWM10 1.97 / 50 0.35 / 9
DIMENSIONS
HOW TO ORDER
TWM/TWW Series
Ceramic Housed Radial Terminal Power
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
98
TUM/TUW Series
Ceramic Housed Axial Terminal Power
TheTUM/TUWSeriesresistorsareourmosteco-
nomical power resistors. They are recommended for
commercial applications where low cost is critical.
They are available in small standard packs for
standard values, or bulk packaged for even lower
costs. FEATURES
•EconomicalCommercialGradeforgeneralpurpose
use
•WirewoundandMetalOxideconstruction
•Wideresistancerange
•Flameproofinorganicconstruction
SERIES SPECIFICATIONS
CHARACTERISTICS
Series Wattage Ohms Voltage Element
TUW3 3 0.01-39 350 Wirewound
TUW5 5 0.01-47 350 Wirewound
TUW7 7 0.10-680 500 Wirewound
TUW10 10 0.10-990 750 Wirewound
TUW15 15 0.10-1000 1000 Wirewound
TUM3 3 180-33K 350 Metal oxide
TUM5 5 220-50 350 Metal oxide
TUM7 7 910-50K 500 Metal oxide
TUM10 10 1000-50K 750 Metal oxide
TUM15 15 1100-150K 1000 Metal oxide
Derating Curve
100
Percent Rated Watts
Ambient Temperature, oC
60
20
0275
80
40
100 200 25070 150
Housing Ceramic
Core Fiberglass or metal oxide
Filling Cement based
Tolerance 5% standard
TCR 0.01-20Ω ±400ppm/°C
20-150KΩ ±350ppm/°C
Dielectric withstanding
voltage
1,000VAC
Short time overload TUW: 10x rated power for 5 sec.
TUM: 5x rated power for 5 sec.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 99
TUM/TUW Series
Ceramic Housed Axial Terminal Power
ORDERING INFORMATION
DIMENSIONS
(in./mm)
Standard part numbers for TUW/TUM series
0.01 –––R01E
0.01 –––R01E
0.02 –––R02E
0.04 –––R04E
0.05 –––R05E
0.10 –––R10E
0.15 –––R15E
0.20 –––R20E
0.27 –––R27E
0.30 –––R30E
0.33 –––R33E
0.39 –––R39E
0.43 –––R43E
0.47 –––R47E
0.56 –––R56E
0.68 –––R68E
0.75 –––R75E
0.82 –––R82E
1.0 –––1R0E
1.5 –––1R5E
2.0 –––2R0E
2.7 –––2R7E
3.0 –––3R0E
3.3 –––3R3E
3.9 –––3R9E
4.3 –––4R3E
4.7 –––4R7E
5.6 –––5R6E
6.8 –––6R8E
7.5 –––7R5E
8.2 –––8R2E
10 –––10RE
15 –––15RE
20 –––20RE
27 –––27RE
30 –––30RE
Ohmic value
TUW3J– 3
TUW5J– 5
TUW15J– 15
Wattage
Part No.
Prefix
Suffix
TUW7J– 7
TUW10J– 10
Ohmic value
TUW3J– 3
TUW5J– 5
TUW15J– 15
Wattage
Part No.
Prefix
Suffix
TUW7J– 7
TUW10J– 10
Ohmic value
TUW3J– 3
TUW5J– 5
TUW15J– 15
Wattage
Part No.
Prefix
Suffix
TUW7J– 7
TUW10J– 10
Ohmic value
TUW3J– 3
TUW5J– 5
TUW15J– 15
Wattage
Part No.
Prefix
Suffix
TUW7J– 7
TUW10J– 10
33 –––33RE
39 –––39RE
43 –––43RE
47 –––47RE
56 –––56RE
68 –––68RE
75 –––75RE
82 –––82RE
100 –––100E
150 –––150E
200 –––200E
270 –––270E
300 –––300E
330 –––330E
390 –––390E
430 –––430E
470 –––470E
560 –––560E
680 –––680E
750 –––750E
820 –––820E
1000 –––1K0
1500 –––1K5
2000 –––2K0
2700 –––2K7
3000 –––3K0
3300 –––3K3
3900 –––3K9
4300 –––4K3
4700 –––4K7
5600 –––5K6
6800 –––6K8
7500 –––7K5
8200 –––8K2
10000 –––10K
Shadedarea:changeprefixtoTUM
Series
TUM = Ceramic Housed
Metal Oxide
TUW = Ceramic Housed
Wirewound
Tolerance
J = 5%
Resistance Value
Example:
R50=0.50Ω
1R0=1Ω
8R2=8.2Ω
250=250Ω
1K0=1,000Ω
8K2=8,200Ω
10K=10,000Ω
TUM3J8R2E
Wattage
3
5
7
10
15
E = RoHS compliant
LH
1.38" ±.197
35mm
±
5
(32mm on 3w)
0.03" ±.002
0.8mm
±
.05
(0.7mm on 3w)
W
Length Height Width
Series Wattage (±1mm) (±1mm) (±1mm)
TUW3 3 0.87 / 22 0.31 / 8 0.31 / 8
TUW5 5 0.87 / 22 0.35 / 9 0.39 / 10
TUW7 7 1.48 / 35 0.35 / 9 0.39 / 10
TUW10 10 1.93 / 49 0.35 / 9 0.39 / 10
TUW15 15 1.93 / 49 0.45/11.5 0.49 / 12.5
TUM3 3 0.87 / 22 0.31 / 8 0.31 / 8
TUM5 5 0.87 / 22 0.35 / 9 0.39 / 10
TUM7 7 1.48 / 35 0.35 / 9 0.39 / 10
TUM10 10 1.93 / 49 0.35 / 9 0.39 / 10
TUM15 15 1.93 / 49 0.45/11.5 0.49 / 12.5
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100
WH/WN Series
Miniature Molded Wirewound FEATURES
•WHprecisionseries
•WNArytonPerrywindingNon-Inductiveseries:
Inductance<1nHat1MHZtest,
•DesignedtomeetMIL-R-26F,MIL-STD-202stan-
dardrequirements
•Manufacturingprocess-Wirewinding/Spot
Welding- by Computer Numerical Control (CNC)
machine tools to ensure consistency of product
quality.
•Encapsulatedbyepoxymoldingcompound
•AdvancedICencapsulationmold/dietechnologies
CHARACTERISTICS
Ceramic Core CeramTec Rubalit® 85% alumina
End Caps Stainless steel, precision formed
Leads Copper wire,100% Sn (lead free)
coated
Resistance Wire ISAOHM® wire TC ±20ppm/°C
Encapsulation SUMICON 1100/1200 Epoxy molding
compound for IC encapsulation
Standard Tolerance D (0.5%), F (1.0%), J (5.0%)
Temperature
Coefficient (ppm/°C)
±90 for 0.100Ω-0.99Ω, ±50 for
1.00Ω-10.00Ω,±20 for >10.00Ω
Maximum Working
Voltage
(PxR)1/2
Derating Linearly from 100% @ +70°C to 0%
@ +150°C.
Operating Temp -55°C to +150°C
SERIES SPECIFICATIONS
Power Resistance
Rating Range Weight
Type (watts) (Ω) (g/1000pc)
WHA 0.5 0.100 - 1.0K 216
WNA 0.100 - 250
WHB 1 0.100 - 4.0K 296
WNB 0.100 - 1.0K
WHC 2 0.10 - 8.0K 712
WNC 0.10 - 2.0K
WHD 3 0.10 - 25K 1160
WND 0.10 - 5.0K
WHE 5 0.10 - 50K 2920
WNE 0.10 - 10K
LD
0.984 /
25
d

DIMENSIONS
Type Wattage L D d
WH/NA 0.5 5.08 / 0.200 2.54 / 0.100 0.60 / 0.024
WH/NB 1 7.00 / 0.276 3.30 / 0.130 0.60 / 0.024
WH/NC 2 11.4 / 0.450 4.57 / 0.180 0.80 / 0.031
WH/ND 3 13.54 / 0.530 5.50 / 0.216 0.80 / 0.031
WH/NE 5 20.00 / 0.790 7.50 / 0.295 1.00 / 0.039
Tape Reel Pc/
Width Pitch Diam. reel
64 / 2.520 5.0 / 0.197 290 / 11.41 1000
64 / 2.520 5.0 / 0.197 290 / 11.41 1000
64 / 2.520 10 / 0.393 290 / 11.41 1000
84 / 3.307 10 / 0.393 290 / 11.41 500
84 / 3.307 10 / 0.393 290 / 11.41 500
Packaging
(continued)
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Series Ohms
Power
A = 0.5
B =1
C = 2
D = 3
E = 5
Tolerance
F = 1%
J = 5%
D = 0.5%
Package
T = Tape
blank = 25pc
pack
RoHS compliant
H = Inductive
N = Non Inductive
Part marking:
0.50, 1.0, 2.0 watt parts
marked with 5-band color code,
3.0 and 5.0 watt parts marked
with part number stamping
Standard part numbers
Wattage: 0.5 0.5 1.0 1.0 2.0 2.0 3.0 3.0 5.0 5.0
Series: WHA WNA WHB WNB WHC WNC WHD WND WHE WNE
Ohms
0.1 WHAR10FE WNAR10FE WHBR10FE WNBR10FE WHCR10FE WNCR10FE WHDR10FE WNDR10FE WHER10FE WNER10FE
0.25 WHAR25FE WNAR25FE WHBR25FE WNBR25FE WHCR25FE WNCR25FE
0.5 WHAR50FE WNAR50FE WHBR50FE WNBR50FE WHCR50FE WNCR50FE WHDR50FE WNDR50FE WHER50FE WNER50FE
0.75 WHAR75FE WNAR75FE WHBR75FE WNBR75FE WHCR75FE WNCR75FE
1 WHA1R0FE WNA1R0FE WHB1R0FE WNB1R0FE WHC1R0FE WNC1R0FE WHD1R0FE WND1R0FE WHE1R0FE WNE1R0FE
2 WHA2R0FE WNA2R0FE WHB2R0FE WNB2R0FE WHC2R0FE WNC2R0FE
4 WHA4R0FE WNA4R0FE WHB4R0FE WNB4R0FE WHC4R0FE WNC4R0FE
5 WHA5R0FE WNA5R0FE WHB5R0FE WNB5R0FE WHC5R0FE WNC5R0FE WHD5R0FE WND5R0FE WHE5R0FE WNE5R0FE
10 WHA10RFE WNA10RFE WHB10RFE WNB10RFE WHC10RFE WNC10RFE WHD10RFE WND10RFE WHE10RFE WNE10RFE
15 WHA15RFE WNA15RFE WHB15RFE WNB15RFE WHC15RFE WNC15RFE WHD15RFE WND15RFE WHE15RFE WNE15RFE
25 WHA25RFE WNA25RFE WHB25RFE WNB25RFE WHC25RFE WNC25RFE
51 WHA51RFE WNA51RFE WHB51RFE WNB51RFE WHC51RFE WNC51RFE
75 WHA75RFE WNA75RFE WHB75RFE WNB75RFE WHC75RFE WNC75RFE
100 WHA100FE WNA100FE WHB100FE WNB100FE WHC100FE WNC100FE WHD100FE WND100FE WHE100FE WNE100FE
150 WHA150FE WNA150FE WHB150FE WNB150FE WHC150FE WNC150FE
200 WHA200FE WNA200FE WHB200FE WNB200FE WHC200FE WNC200FE
250 WHA250FE WNA250FE WHB250FE WNB250FE WHC250FE WNC250FE WHD250FE WND250FE WHE250FE WNE250FE
330 WHA330FE WHB330FE WNB330FE WHC330FE WNC330FE
470 WHA470FE WHB470FE WNB470FE WHC470FE WNC470FE
560 WHA560FE WHB560FE WNB560FE WHC560FE WNC560FE WHD560FE WND560FE WHE560FE WNE560FE
750 WHA750FE WHB750FE WNB750FE WHC750FE WNC750FE
1K WHA1K0FE WHB1K0FE WNB1K0FE WHC1K0FE WNC1K0FE WHD1K0FE WND1K0FE WHE1K0FE WNE1K0FE
2.5K WHB2K5FE WHC2K5FE WND2K5FE
5K WHD5K0FE WHE5K0FE WNE5K0FE
10K WHD10KFE WHE10KFE WNE10KFE
25K WHE25KFE
PERFORMANCE CHARACTERISTICS
Test Conditions of Test Performance
Thermal shock Environmental chamber, -55°C +0°C, -3°C to 150°C +3°C, -0°C,
5 cycles, minimum 15 min. at each extreme
±(1.0% + 0.5mΩ)ΔR
Short-time overload Overload voltage 5x rated wattage for 5 sec. ±(0.5% + 0.5mΩ)ΔR
Solderability Bath temp. 260°C ±5°, immersion time 5 sec. ±0.5, JIS C 5201
4.18
>90% of contact face
covered new solder
Resistance to solder
heat
Bath temp. 260°C ±5°, immersion time 5 sec. ±0.5, JIS C 5201
4.18
±(0.5% + 0.5mΩ)ΔR
Dielectric withstanding
voltage
Magnitude of test voltage >500 volts rms.; duration 1 min. Pass
Insulation resistance Magnitude of test voltage 500 volts rms. ±10%; duration 1 min. >109Ω
High Temperature
Exposure
Exposed to an ambient temperature of 175°C +5°/-0° for 250 ±8
hours
±(1.0% + 0.5mΩ)ΔR
Low Temperature
Storage
At a temperature of -65°C ±2° for a period of 24 hours ±4 ±(0.5% + 0.5mΩ)ΔR
Life Test temp. at 70°C ±2°, rated DC continuous working voltage
applied, 1.5 hours on and 0.5 hours off, 1000 hours
±(2.0% + 0.5mΩ)ΔR
WH/WN Series
Miniature Molded Wirewound
HOW TO ORDER
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102
TA Series
Power Chip
Thick Film on Alumina Substrate
Series Wattage
TA203 3.0
TA303 3.0
Substrate Alumina
Resistor Thick Film
Coating Glass
Terminals Solder Plated Phosphor Bronze
Temperature Coefficient 1 ohm: 450 ppm/°C
1 to 100Ω: 100 ppm/°C
101Ω and up: 50 ppm/°C
Tolerance ±1%, ±5% and ±10%
Power Rating Based on 25°C free air
Resistance Range 0.25 ohm to 10M ohm. Consult fac-
tory for other values
Maximum Operating Voltage 350 VAC, 500 VDC through glass,
1000 VAC, 1500 VDC through sub-
strate, not to exceed power rating
Overload Five times rated power, as long as the
one second average dissipation does
not exceed the wattage rating. ∆R:
±2%, 2000 hours
Derating 100% @ 25°C to 0% @ 180°C ambi-
ent.
Equivalent Parallel Capacitance 1.0pf (100 MHz)
Withstanding Voltage 5000V thru back side
Operating Temperature Range -55°C to +180°C
Overload Current 20 x rated current up to 8 ms (ΔR ±
0.5%)
Test
Test Condition
MILR83401
Specification
Life (Rated
Power)
40°C, rated power, 90
min ON 30 min OFF,
1000 hrs.
ΔR
±( 1.0% + 0.05Ω)
Life
(Moisture
Load)
60°C, 90 - 95% RH,
rated power, 90 min
ON 30 min OFF, 1000
hrs.
ΔR
±( 1.0% + 0.05Ω)
Temperature
Cycling
Room temp > -55°C
30 min > RT 10 min ±
120°C 30 min > RT10
min 5 cycles
ΔR
±( 0.25% + 0.05Ω)
Flammability UL94V-O rated (not recognized)
Soldering
Heat
350°C Solderpot, 3
secs.
ΔR
±( 0.25% + 0.05Ω)
Insulation
Resistance
DC 100V, 1 min Over 1000M ohm
Ohmite’s original Power Chip resistors feature our
thick film on alumina substrate technology. These
planar packages yield space saving, 10W/in2 power
densitiesthatrequireover50%lessboardspace
than other radial packages. Convection cooling is
maximizedbytheplanarpackageconfiguration
which dissipates heat well above board level.
Ohmite’s power chip resistors have a 125% higher
operating temperature range than competitive prod-
uctofsimilardesign.Hightemperaturesolderand
in-process plating keep terminations secure under
self-heating effects by preventing re-flow from full
power operation.
Flexiblepackagingschemesmaketheseresistors
ideal for power supplies, audio amplifiers, video fly-
back, and other power control applications.
FEATURES
•High-TempTerminalConstruction
•WideResistanceRange
•LowInductance(50nH-100nH)
•HighPowerDensity
•Easytoinstall.PC-mountable
CHARACTERISTICS
SERIES SPECIFICATIONS
Series Wattage
TA205 5.0
TA305 5.0
TA605 5.0
TA805 5.0
Series Wattage
TA207 7.5
TA307 7.5
Series Wattage
TA310 10.0
TA810 10.0
Series Wattage
TA025 25.0
TA050 50.0
TA100 100.0
(continued)
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Series Wattage P LengthL HeightH
TA203PA 3.0 0.200 / 5.08 0.50 / 12.70 0.60 / 15.24
TA303PA 3.0 0.300 / 7.62 0.50 / 12.70 0.60 / 15.24
TA205PA 5.0 0.200 / 5.08 0.50 / 12.70 1.00 / 25.40
TA305PA 5.0 0.300 / 7.62 0.50 / 12.70 1.00 / 25.40
TA605PA 5.0 0.600 / 15.24 1.00 / 25.40 0.50 / 12.70
TA805PA 5.0 0.800 / 20.32 1.00 / 25.40 0.50 / 12.70
TA207PA 7.5 0.200 / 5.08 0.75 / 19.05 1.00 / 25.40
TA307PA 7.5 0.300 / 7.62 0.75 / 19.05 1.00 / 25.40
TA310PA 10.0 0.300 / 7.62 1.00 / 25.40 1.00 / 25.40
TA310PW* 10.0 0.300 / 7.62 1.085 / 27.56 1.00 / 25.40
TA810PA 10.0 0.800 / 20.32 1.00 / 25.40 1.00 / 25.40
TA810PW* 10.0 0.800 / 20.32 1.085 / 27.56 1.00 / 25.40
TA025PA 25.0 1.90 / 48.3 2.220 / 56.39 1.170 / 29.70
TA025PY* 25.0 1.90 / 48.3 2.220 / 56.39 1.170 / 29.70
TA050PA 50.0 1.90 / 48.3 2.220 / 56.39 2.270 / 57.60
TA050PY* 50.0 1.90 / 48.3 2.220 / 56.39 2.270 / 57.60
TA100PA 100.0 4.10 / 104.1 4.420 / 112.27 2.270 / 57.60
TA100PY* 100.0 4.10 / 104.1 4.420 / 112.27 2.270 / 57.60
*10-100 watts available in PW,PA, and PY packages.
Power Rating:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
025 = 25
050 = 50
100 = 100
TA305PA4K50JE
Series
Tolerance
K = 10%
J = 5%
F = 1%
Package:
PA = pin terminals,
std. for 3-10 W
PW = wraparound,
std. for 10-100 W
PY = high-stability
wraparound
Resistance Value (Ω)
R250 = 0.25
10R0 = 10.0
2K00 = 2,000
45K0 = 45,000
Pin spacing
(on 3-10W models only)
2 = .2"
3 = .3"
8 = .8"
RoHS compliant
H
0.020" / 0.51 mm typ.
P
L
L+0.08"/2mm max.
0.200" / 5.08 mm
0.075" / 1.91 mm dia. finished pins
0.070" /
1.78 mm
0.040" / 1.02 mm
0.240" /
6.10 mm
0.300" /
7.62 mm
0.195" /
4.95 mm
0.855" /
21.72 mm
0.040" /
1.02 mm
typ.
PA
3, 5, 7.5
& 10 watt
PW
10, 25, 50
& 100 watt PY
mount
P
L
0.07"/1.78mm
H
0.17"/4.32mm
0.10"/2.54mm
0.02" x 0.015" Pins
typical
PC board
0.150" / 3.8 mm
min.
0.150" /
3.8 mm
min.
Standard part numbers for TA series
=Mostpopularstandardvalues,=Stockvalues
DIMENSIONS
(±.020 in. / ±.508mm)
TA Series
Power Chip
Thick Film on Alumina Substrate
ORDERING INFORMATION
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
0.25 –––R250J
1.00 –––1R00J
1.50 –––1R50J
2.00 –––2R00J
4.70 –––4R70J
5.00 –––5R00J
5.10 –––5R10J
7.50 –––7R50J
8.20 –––8R20J
10.00 –––10ROJ
11.00 –––11R0J
12.00 –––12R0J
15.00 –––15R0J
20.00 –––20R0J
24.00 –––24R0J
27.00 –––27R0J
33.00 –––33R0J
47.00 –––47R0J
50.00 –––50R0J
62.00 –––62R0J
68.00 –––68R0J
75.00 –––75R0J
100.00 –––100RJ
150.00 –––150RJ
200.00 –––200RJ
250.00 –––250RJ
270.00 –––270RJ
300.00 –––300RJ
470.00 –––470RJ
500.00 –––560
620.00 –––620RJ
680.00 –––680RJ
1,000.00 –––1K00J
1,500.00 –––1K50J
1,800.00 –––1K80J
2,000.00 –––2K00J
2,500.00 –––2K50J
3,000.00 –––3K00J
4,000.00 –––4K00J
4,700.00 –––4K70J
5,000.00 –––5K00J
5,100.00 –––5K10J
7,500.00 –––7K50J
10,000.00 –––10K0J
15,000.00 –––15K0J
18,000.00 –––18K0J
20,000.00 –––20K0J
30,000.00 –––30K0J
39,000.00 –––39K0J
50,000.00 –––50K0J
75,000.00 –––75K0J
100,000 –––100KJ
150,000 –––150KJ
200,000 –––200KJ
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104
PFE and PFR Series
Powr-Rib® Edgewound
Edgewound and Round Wire
Current Rating Continuous duty as listed on follow-
ing page.
Wattage Rating 700 to 1,000 (up to 1,600 watts on
special order)
Resistance
Tolerance
±10% standard, ±5% available
Terminals Clamps, movable along resistor
wire for setting intermediate resis-
tance values on Edgewound units
(current must be derated in propor-
tion).
Temperature
Coefficient
±300 ppm/°C for resistors 50 amps
and more; ±500 ppm/°C for resis-
tors 47 amps or less
Ohmic Values See chart on following page
Mounting Metal mounting bar is slotted on
each end to facilitate installation.
Short Term
Overload
10x rated wattage for five seconds
100
Percent Rated Power
Ambient Temperature, °C
60
20
0
80
40
25 50 150 3501000 200 250 300
DesignedinbothEdgewoundandRound
Wire formats, these rugged resistors can
handle 700 to 1000 Watts of power.
Specify our Edgewound design for
very low resistance and high power
capacity. When higher resistance with lower power
capacityisrequireduseourRoundWiredesign.
These resistors are constructed of a heavy resistance alloy mounted on
ceramic insulators and supported by a metal mounting bracket. Metal parts,
except for the resistance element, are heavily plated to prevent oxidation at high
operating temperatures and to prevent corrosion. The mounting bar is slotted
on each end to facilitate installation. Edgewound units provide clamp-type ter-
minals, permitting a reliable connection which can be moved along the resistive
element to obtain intermediate values.
CHARACTERISTICS
Derating
Size* (No. of
Insulator-Sections Long) 2 3 4 5 (std.) 6 7 8
Dimension A in. 8.875 11.875 14.875 17.875 20.875 23.875 26.875
mm (225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
Dimension B in. 7.250 10.250 13.250 16.250 19.250 22.250 25.250
mm (184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
Max. Amps Ohms Ohms Ohms Ohms Ohms Ohms Ohms
PFE Edgewound
100 0.033 0.057 0.080 0.100 0.120 0.140 0.160
91 0.040 0.070 0.100 0.120 0.140 0.160 0.180
89 0.046 0.078 0.110 0.140 0.170 0.200 0.230
78 0.052 0.088 0.120 0.160 0.190 0.220 0.250
75 0.060 0.100 0.140 0.180 0.210 0.250 0.300
68 0.070 0.120 0.180 0.220 0.260 0.300 0.340
63 0.080 0.130 0.190 0.250 0.300 0.350 0.400
57 0.100 0.160 0.230 0.300 0.360 0.420 0.480
54 0.110 0.180 0.250 0.330 0.400 0.470 0.540
50 0.120 0.200 0.280 0.370 0.450 0.530 0.610
47 0.170 0.280 0.380 0.500 0.600 0.700 0.800
43 0.210 0.330 0.460 0.600 0.720 0.850 0.980
41 0.230 0.360 0.510 0.670 0.800 0.930 1.06
39 0.260 0.420 0.580 0.750 0.900 1.05 1.20
33 0.350 0.560 0.770 1.00 1.20 1.40 1.60
29 0.450 0.730 1.00 1.30 1.50 1.75 2.00
26 0.560 0.900 1.20 1.60 1.90 2.20 2.50
18.4 0.690 1.20 1.70 2.20 2.70 3.10 3.50
16.3 0.880 1.50 2.20 2.80 3.40 4.00 4.60
14.6 1.10 1.90 2.70 3.50 4.30 5.10 5.90
12.7 1.40 2.40 3.50 4.50 5.50 6.50 7.50
11.8 1.70 2.90 4.20 5.40 6.60 7.80 9.00
10.3 2.10 3.70 5.30 6.80 8.30 9.80 11.3
9.4 2.70 4.60 6.50 8.50 10.40 12.3 14.2
PFR Round-Wire
8.3 3.4 5.9 8.5 11.0 13.5 16.0 18.5
7.6 4.1 7.1 10.0 13.0 15.9 18.8 21.7
6.6 5.3 9.2 13.0 17.0 20.8 24.6 28.4
5.9 6.3 10.9 15.4 20.0 24.5 29.0 33.5
5.1 7.9 13.6 19.3 25.0 30.7 36.4 42.1
*Standard 5-section units are stocked; part numbers are listed on the following page.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 105
PFE and PFR Series
Powr-Rib® Edgewound
Edgewound and Round Wire
PFE5KR100E
Style
PFE = Edgewound
PFR = Roundwire
# of
Sections
2 5
3 6
4 7
8
Tolerance
K = 10% Ohms
R100 = 0.10
1R00 = 1.0
10R0 = 10
RoHS Compliant
EDGEWOUND
Ohms Part # Watts Amps
0.1 PFE5KR100E 1000 100
0.12  PFE5KR120E 994 91
0.14 PFE5KR140E 1100 89
0.16 PFE5KR160E 973 78
0.18 PFE5KR180E 1012 75
0.22 PFE5KR220E 1017 68
0.25 PFE5KR250E 992 63
0.3 PFE5KR300E 975 57
0.33 PFE5KR330E 962 54
0.37 PFE5KR370E 925 50
0.5 PFE5KR500E 1105 47
0.6 PFE5KR600E 1109 43
0.67 PFE5KR670E 1126 41
0.75 PFE5KR750E 1141 39
1 PFE5K1R00E 1089 33
1.3 PFE5K1R30E 1093 29
1.6 PFE5K1R60E 1082 26
2.2 PFE5K2R20E 745 18.4
2.8 PFE5K2R80E 744 16.3
3.5 PFE5K3R50E 746 14.6
4.5 PFE5K4R50E 726 12.7
5.4 PFE5K5R40E 752 11.8
6.8 PFE5K6R80E 721 10.3
8.5 PFE5K8R50E 751 9.4
ROUNDWIRE
Ohms Part # Watts Amps
11 PFR5K11R0E 757 8.3
13 PFR5K13R0E 750 7.6
17 PFR5K17R0E 740 6.6
20 PFR5K20R0E 696 5.9
25 PFR5K25R0E 650 5.1
= Standardvalues
= Non-standardvaluessubject
to minimum handling
charge per item.
HOW TO ORDER
DIMENSIONS
2.063" -0/+.187
52.400 mm -0/+4.763
2.313"
58.750 mm
1.00"
25.400 mm
0.531"
13.494 mm
17.875" ±.063
454.02 mm
16.250" ±.063
412.75 mm
1.00"
25.400 mm
0.750"
19.050 mm
0.531"
13.494 mm
Terminal 2172B
(30 amps & more)
Terminal 2172G
(29 amps & less)
PFE5K
Edgewound
1.00"
25.400 mm
0.531"
13.494 mm
17.875" ±.063
454.02 mm
16.250" ±.063
412.75 mm
1.00"
25.400 mm
0.750"
19.050 mm
0.531"
13.494 mm
PFR5K
Round wire
2.625" -0/+.187
66.67 mm -0/+4.763
Terminal 2175
(standard on
8.3 amps & less)
Terminal 2176
(optional for 90
ϒ
terminal mounting)
1.688"
42.875 mm
A
B
A
B
Standard:
Standard:
Size (No. of
Insulator-Sections Long) 2 3 4 5 (std.) 6 7 8
Dimension A in. 8.875 11.875 14.875 17.875 20.875 23.875 26.875
mm (225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
Dimension B in. 7.250 10.250 13.250 16.250 19.250 22.250 25.250
mm (184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
Allvaluesforreferenceonly;
Consult factory for details.
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106
CHARACTERISTICS
DIMENSIONS
SERIES SPECIFICATIONS
14984 Series
High Current Round Edgewound
These high current round edgewound resistors han-
dle a variety of applications including dynamic brak-
ing, load banks, motor starting, and plugging. They
are available in a variety of ohm and current ratings
common to transit use.
A sturdy welded steel frame supports the refrac-
toryinsulators.Theframeisfinishedwithazinc
chromate conversion for corrosion resistance. The
ceramic insulators separate turns of the resistance
Current Rating Continuous current ratings are based on a maximum tem-
perature rise of 375°C as specified by NEMA Industrial
Control Standards for bare element resistors.
Wattage Rating Can be found from I2R.
Resistance
Tolerance
±10%
Special Engineering
Services
Available for ohmic values other than those listed, mount-
ings, other terminal styles, all stainless frame and terminal
construction.
Ordering Information Order using the Ward Leonard part number from the table.
Ohmite Continuous Ward Leonard Westinghouse
Part Number Amps Ohms Watts Part Number Style Number
76021-R118 160 0.118 3021 14984-10-01 1796207
76021-R157 140 0.157 3077 14984-10-03 1796206
76021-R171 130 0.171 2889 14984-10-04 31D2615A05
76021-R285 100 0.285 2850 14984-10-07 31D2614A03
16.75"
14.9"
ø 5" max.
elements from each other and the frame. The resis-
tance element is a stainless steel strip, used for
its corrosion resistance, negligible temperature
coefficient, and Ohms per foot vs. current carrying
capacity. The resistance element is created by edge-
winding a stainless strip into a continuous coil of the
proper length. Zinc plated terminals welded to the
resistance element complete the assembly.
Contact us with your specific needs.
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Series Wattage Ohms Core Code Voltage Standard Terminal
D12 12 1.0-10K D 565 57
D25 25 1.0-25K K 625 40
D50 50 1.0-100K K 1625 40
D75 75 1.0-100K K 2625 40
D100 100 1.0-100K M 2845 40
D175 175 1.0-100K P 3595 46
D225 225 1.0-100K P 4595 46
D500 500 1.5-15K S 4970 45
D1000 1000 3.0-27.7K S 8900 45
Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.
Adjustability 10% to 90% of full value. Wattage is proportional to this adjusted
resistance value.
Coating Lead free vitreous enamel. Large models (500 watts and up) are
supplied in Silicone Ceramic. Also available in low-cost Centohm
coating; Consult factory.
Core Tubular ceramic.
Terminals Solder coated radial lug. RoHS solder composition is 96% Sn,
3.5% Ag, 0.5% Cu
Adjustable
terminal
Nickel plated steel. (Screwdriver type adjustable lug supplied
standard. Other types, including silver contact units, available.)
Derating Linearly from 100% @ +25°C to 0% @ +350°C.
Tolerance ±10% (K)
Power rating Based on 25°C free air rating. The stated wattage rating applies
only when the entire resistance is in the circuit. Setting the lug at
an intermediate point reduces the wattage rating by approximately
the same proportion. Example: If the lug is set at half resistance,
the wattage is reduced by approx. one-half.
Overload 10 times rated wattage for 5 seconds.
Temperature
coefficient
±260 ppm/°C
Dielectric
withstanding
voltage
1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 and 225 watt rat-
ing (measured from terminal to mounting bracket)
Max. amps To calculate, use the formula √P/R.
210 Series
Dividohm® Vitreous Enamel
Adjustable Power
Choose Ohmite’s 210 Type adjustable resistors for
applicationsrequiringsettingsatdifferentresistance
values.Thesewirewoundresistorsareequippedwith
an adjustable lug, making them ideal for adjusting
circuits, obtaining odd resistance values and set-
tingequipmenttomeetvariouslinevoltages.210
Type resistors feature a hollow core to permit secure
fastening with spring-type clips or thru bolts with
washers. They also offer the durability of lead free
vitreous enamel coating and all-welded construction.
Mounting brackets not included with resistors.
FEATURES
•Terminalssuitableforsolderingorboltconnection.
•Adjustablelugsupplied
•Highwattageapplications
•All-weldedconstruction
•Ruggedleadfreevitreousenamelcoating.
•Flameresistantcoating
•Additionaladjustablelugsavailable
•RoHScompliantproductavailable.Add“E”suffixto
part number to specify
CHARACTERISTICS
SERIES SPECIFICATIONS
Power limitations for high resis-
tance values: When resistance
exceeds the resistance values listed
below, derate the Power Rating by
25% to improve reliability:
Power Resistance
rating value
12W 4,500Ω
25W 9,000Ω
50W 20,000Ω
75W 35,000Ω
100W 50,000Ω
No power
derating neces-
sary for ratings
higher than
100W.
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108
L
DC
=Standardvalues;checkavailabilityat
www.ohmite.com
1.0 –––1R0E
2 –––2R0E
3 –––3R0E
4 –––4R0E
5 –––5R0E
7.5 –––7R5E
10 –––10RE
15 –––15RE
20 –––20RE
25 –––25RE
50 –––50RE
75 –––75RE
100 –––100E
150 –––150E
200 –––200E
250 –––250E
300 –––300E
400 –––400E
500 –––500E
750 –––750E
800 –––800E
1,000 –––1K0E
1,250 –––1K25E
1,500 –––1K5E
2,000 –––2K0E
2,500 –––2K5E
3,000 –––3K0E
4,000 –––4K0E
5,000 –––5K0E
6,000 –––6K0E
7,000 –––7K0E
7,500 –––7K5E
10,000 –––10KE
12,000 –––12KE 
15,000 –––15KE
20,000 –––20KE
25,000 –––25KE
50,000 –––50KE
100,000 –––100KE
Wattage Wattage Wattage
Ohmic value
D12K––– 12
D50K––– 50
D175K––– 175
Part No.
Prefix
Suffix
D225K––– 225
D500K––– 500
D1000K–––1000
D25K––– 25
D100K––– 100
D75K––– 75
Ohmic value
D12K––– 12
D50K––– 50
D100K––– 100
D175K––– 175
Part No.
Prefix
Suffix
D225K––– 225
D500K––– 500
D1000K–––1000
D25K––– 25
D75K––– 75
Ohmic value
D12K––– 12
D50K––– 50
D175K––– 175
Part No.
Prefix
Suffix
D225K––– 225
D25K––– 25
D100K––– 100
D75K––– 75
See 270 series custom core
and terminal info
Tolerance
J= 5%
K= 10%
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS Compliant
Series Wattage
Coating
Blank =Vitreous
C=Centohm
S=Silicone
50KΩand100KΩ resistance values involve very fine resistance wire and should not be
used in critical applications without burn-in and/or thermal cycling.
Tolerance
J= 5%
K= 10%
Core Diameter
See “Core and
Terminal Selection”
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
RoHS Compliant
Coating
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
Wattage
Terminal Type
See “Resistor Terminals
for Tubular Cores”
Series Wattage L D C Core Code Standard Terminal
D12 12 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 57
D25 25 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 40
D50 50 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 40
D75 75 6.0 / 152.4 0.562 / 14.3 0.313 / 7.94 K 40
D100 100 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 40
D175 175 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 46
D225 225 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 46
D500 500 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 45
D1000 1000 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 45
210 Series
Dividohm® Vitreous Enamel
Adjustable Power
DIMENSIONS
(in. / mm)
ORDERING INFORMATION
Made-to-order Parts
Standard Values
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250 Series
‘Thin’ Stackohm®
Vitreous Enamel Power
Series Wattage Ohms Max. Voltage*
F10 10 1.0-15K 187
F20 20 1.0-50K 815
F30 30 1.0-10K 281
F40 40 1.0-25K 655
F55 55 1.0-30K 1405
Adjustable versions and other sizes available; Consult Ohmite Also available
in low cost Centohm or Silicone coating; Consult Ohmite.
* Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resis-
tance value of specified product
•Smallsize-to-powerratio.
•Stackable
•Integral mounting bracket conducts heatto
mounting surface.
•Lowprofileforuseinequipmentwherespaceis
limited.
•All-weldedconstruction.
•RoHScompliantproductavailable.Add“E”suffixto
part number to specify.
When limited space is a consideration, choose
Ohmite’s“thin”stackable250Typeresistors.These
oval-shaped ceramic-core resistors feature a low
profile to permit installation in spaces with height
restrictions.Theyarealsoequippedwithintegral
mounting brackets so they can be fastened to a
chassis and stacked in locations with limited surface
area.
When properly fastened, the mounting brackets
addaheatsinkingbenefitresultinginasmallersize
perwatt.Durable250Typeresistorsarefullywelded
and coated with lead free vitreous enamel.
Coating Lead free vitreous enamel
Core Ceramic
Terminals Tinned lug with hole. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance ±5% (J)
Power rating Based on mounting a single resistor on a metal surface measuring 10”
(254mm) square by 0.04” (1.016mm) thick. Reduce rating by 15% when
mounting on non-metallic surface
Overload 10x rated wattage for 5 seconds if max. voltage is not exceeded
Temperature
coefficient
1 to 20Ω: ±400 ppm/°C
Over 20Ω: ±260 ppm/°C
Dielectric with-
standing voltage
500 VAC: 10 and 20 watt rating. 1000 VAC: 30, 40 and 55 watt rating (mea-
sured from lug to mounting bracket)
Max. amps To calculate, use the formula √P/R
CHARACTERISTICS
SERIES SPECIFICATIONS
FEATURES
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110
Series Wattage Length L Length A
F10 10 0.750 / 19.050 1.000 / 25.400
F20 20 2.000 / 50.800 2.313 / 58.750
F30 30 1.250 / 31.750 2.000 / 50.800
F40 40 2.000 / 50.800 2.750 / 69.850
F55 55 3.500 / 88.900 4.250 / 107.950
0.625"
15.875 mm
0.031"
0.794 mm
0.125"
3.175 mm
Diam.
0.063"
1.588 mm
Diam.
0.125"
3.175 mm
L
A
0.110":
2.776 mm
0.250"
6.350 mm
0.375"
9.525 mm
10W & 20W
0.125"
3.175 mm
0.188"
4.763 mm
Diam.
0.109"
2.776 mm
Diam.
0.196"
4.979 mm
L
A
0.250"
6.350 mm
0.125"
3.175 mm
0.438"
11.113 mm
30W, 40W & 55W
0.375"
9.525 mm
0.125" *
3.175 mm
1.000"
25.400 mm
0.250" *
6.350 mm
0.938"
23.813 mm
0.375"
9.525 mm
*Reference dimension only; varies according to resistance
value.
Note: When resistors are stacked, use washers or spacers
as required to insure clearance and improve power dissipa-
tion.
250 Series
‘Thin’ Stackohm®
Vitreous Enamel Power
DIMENSIONS
(in. / mm)
0.625"
15.875 mm
0.031"
0.794 mm
0.125"
3.175 mm
Diam.
0.063"
1.588 mm
Diam.
0.125"
3.175 mm
L
A
0.110":
2.776 mm
0.250"
6.350 mm
0.375"
9.525 mm
0.125"
3.175 mm
0.188"
4.763 mm
Diam.
0.109"
2.776 mm
Diam.
0.196"
4.979 mm
L
A
0.250"
6.350 mm
0.125"
3.175 mm
0.438"
11.113 mm
T T
B
WW
B
0.094"
2.381 mm
0.125"
3.175 mm
Diam.
0.063"
1.588 mm
Diam.
0.196"
4.979 mm
L
A
0.125"
3.175 mm
0.438"
11.113 mm
T
B
0.813"
20.638 mm
Core
size
Core
size
Core
size
0.125"
3.175 mm
0.188"
4.763 mm
Diam.
0.109"
2.776 mm
Diam.
0.196"
4.979 mm
L
A
0.125"
3.175 mm
0.438"
11.113 mm
(SS)
T
B
W
Core
size
0.188"
4.763 mm
0.250"
6.350 mm
0.531"
13.494 mm
(SSH)
0.125"
3.175 mm
0.188"
4.763 mm
Diam.
0.109"
2.776 mm
0.156" x0.313"
3.969 x 7.938 mm
Slot L
A
0.5"
12.7 mm
T
B
W
Core
size
0.188"
4.763 mm
Brackets
cemented
in core
MOUNTING
Inadditiontothestandardboxbracket,studtypebrackets
areavailableforstackingthestandardsizeresistors.Stud
typebracketsareavailableintwoheights:standard(SS,
0.437”/11.113mm)andhigh(SSH,0.531”/13.494mm).The
SSHstudisrecommendedwhenstackingtheadjustableType
260, as it assures clearance for the adjustable lugs to pass
eachother.SpacerwasherNo.6027(O.D.0.219”/5.556mm,
I.D.0.125”/3.175mm,thickness0.094”/2.381mm)isrecom-
mended for use with the miniature adjustable and fixed resis-
tors to provide clearance, as explained above, or increased
wattage. See chart.
Derating for stacked mounting
Stacked resistors should be derated to prevent excessive tem-
peratures due to proximity. Approximate ratings are given in
the table.
2 70 70 75
3 60 60 69
4 50 50 60
Miniature with
0.094” (2.381 mm)
Spacer WasherMiniature
Std. or Inter.
Percent of Single Unit Rating
No. of
Resistors
(continued)
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250 Series
‘Thin’ Stackohm®
Vitreous Enamel Power
CORE AND TERMINAL SELECTION
ForMadetoOrderType250StackohmResistors
Miniature
10 0.750”(19.050mm) 0.375”(9.525mm) 0.125”(3.175mm) 1 15,000 TA 1 1.000”(25.400mm) 0.375”(9.525mm) 51
15 1.000”(25.400mm) 0.375”(9.525mm) 0.125”(3.175mm) 1 25,000 TA 1 1.250”(31.750mm) 0.375”(9.525mm) 51
20 2.000”(50.800mm) 0.375”(9.525mm) 0.125”(3.175mm) 1 50,000 TA 1 2.313”(58.750mm) 0.375”(9.525mm) 51
12 0.688”(17.463mm) 0.594”(15.081mm) 0.234”(5.953mm) 1 20,000 TB ** 51
Intermediate
21 1.000”(25.400mm) 0.813”(20.638mm) 0.250”(6.350mm) 1 8,000 TD 2 1.313”(33.350mm) 0.594”(15.081mm) 51
25 1.500”(38.100mm) 0.813”(20.638mm) 0.250”(6.350mm) 1 15,000 TD 2 1.813”(46.050mm) 0.594”(15.081mm) 51
Standard
30 1.250”(31.750mm) 1.000”(25.400mm) 0.250”(6.350mm) 1 10,000 TE 5 1.750”(44.450mm) 0.938”(23.813mm) 57
3,4 2.000”(50.800mm)
40 2.000”(50.800mm) 1.000”(25.400mm) 0.250”(6.350mm) 1 25,000 TE 5 2.500”(63.500mm) 0.938”(23.813mm) 57
3,4 2.750”(69.850mm)
55 3.500”(88.900mm) 1.000”(25.400mm) 0.250”(6.350mm) 1 30,000 TE 5 4.000”(1.1.600mm) 0.938”(23.813mm) 57
3,4 4.250”(107.950mm)
70 4.750”(120.650mm) 1.000”(25.400mm) 0.250”(6.350mm) 1 120,000‡ TE 5 5.250”(133.350mm) 0.938”(23.813mm) 57
3,4 5.500”(139.700mm)
95 6.000”(152.400mm) 1.000”(25.400mm) 0.250”(6.350mm) 1 150,000‡ TE 5 6.500”(165.100mm) 0.938”(23.813mm) 57
3,4 6.750”(171,450mm)
Free Air
Wattage
Rating* Length L Width W Thickness T
Code
for
Core
Dia.
Min.
Ohms
Max.
Practical
Ohms
Standard
Terminal
Fig.
No. Dimension A Dimension B
*Basedonmountingonsteeelpanel10”(254mm)x10”x0.040”(1.016mm).
†Insidedimensionsofcoreare:0.250”(6.350mm)x0.047”(1.191mm)forTA;0.406”
(10.319mm)x0.047”(1.191mm)forTB;0.438”(11.113mm)x0.063”(1.588mm)forTD;
0.672”(17.069mm)x0.063”(1.588mm)forTE.
Core Dimensions†
‡ThesesizesareOhmicone(silicone-ceramic)coated–type450-460.
**Usersuppliesbrackets.
1 –––1R0E
1.5 –––1R5E
2 –––2R0E
3 –––3R0E
4 –––4R0E
5 –––5R0E
7.5 –––7R5E
10 –––10RE
15 –––15RE
20 –––20RE
25 –––25RE
30 –––30RE
40 –––40RE
50 –––50RE
75 –––75RE
100 –––100E
150 –––150E
200 –––200E
250 –––250E
300 –––300E
400 –––400E
500 –––500E
750 –––750E
800 –––800E
1,000 –––1K0E
1,250 –––1K25E
1,500 –––1K5E
2,000 –––2K0E
2,500 –––2K5E
3,000 –––3K0E
4,000 –––4K0E
5,000 –––5K0E
6,000 –––6K0E
7,500 –––7K5E
10,000 –––10KE
15,000 –––15KE
20,000 –––20KE
25,000 –––25KE
40,000 –––40KE
=Standardvalues;
check availability at
www.ohmite.com
Ohmic value
F10J––– 10
F20J––– 20
F30J––– 30
F40J––– 40
Wattage
Part No.
Prefix
Suffix
F55J––– 55
Ohmic value
F10J––– 10
F20J––– 20
F30J––– 30
F40J––– 40
Wattage
Part No.
Prefix
Suffix
F55J––– 55
Wattage
Ohmic value
F10J––– 10
F20J––– 20
F30J––– 30
F40J––– 40
Part No.
Prefix
Suffix
F55J––– 55
See web-
site for
custom
core info
Tolerance
F= 1%
H= 3%
J= 5%
K= 10%
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS CompliantSeries
WattageCoating
Blank =Vitreous
C=Centohm
S=Silicone
Ohms
Example:
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
Series
Vitreous enamel:
25 = 250 Fixed
26 = 260 Adjustable
Silicone ceramic:
45 = 450 Fixed
46 = 460 Adjustable
Wattage &
Core Code
See “Core and
Terminal Selection”
Terminal Type
See “Resistor Terminals for Tubular Cores”
Mounting Brackets
(user supplies bracket for core TB)
B= Stacking box
S= Stacking stud, std. height
H= Stacking stud high
U= Unit type
RoHS
Compliant
Tolerance
J= 5%
ORDERING INFORMATION
Made-to-order Parts
Standard Values
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
112
270 Series
Vitreous Enamel Power
Series Wattage Ohms Core Code Voltage Std. Terminal
L12 12 0.1-51K D 565 57
L25 25 0.15-100K K 625 40
L50 50 0.38-260K K 1625 40
L100 100 0.23-101K M 2845 40
L175 175 0.13-101K P 3595 46
L225 225 0.16-129K P 4595 46
L500 500 0.38-218K S 4970 45
L1000 1000 0.69-392K S 8900 45
Non-Inductive versions available;
Other sizes available; Also available in
low cost Centohm or Silicone coating;
Consult Ohmite.
* Maximum Voltage is based on
Ohm’s Law [V=√P*R] as limited by the
resistance value of specified product
Coating Lead free vitreous enamel. Large models (500 watts and up) are supplied in Silicone Ceramic.
Also available in low-cost Centohm coating; Consult factory.
Core Tubular ceramic.
Terminals Solder coated radial lug. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating Linearly from 100% @ +25°C to 0% @ +350°C.
Tolerance ±5% 1Ω and over (J); ±10% under 1Ω (K)
Power rating Based on 25°C free air rating.
Overload 10 times rated wattage for 5 seconds.
Temperature coefficient 1 to 20Ω: ±400 ppm/°C; Above 20Ω: ±260 ppm/°C
Dielectric withstanding voltage 1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 to 225 watt rating (Measured from terminal to
mounting bracket)
Max. amps use the formula √P/R
Power limitations for
high resistance values
When resistance exceeds the resistance values listed, derate the Power Rating by 25% to
improve reliability. No power derating necessary for ratings higher than 100W.
Power Resistance
rating value
12W 3,900Ω
25W 12,000Ω
50W 35,000Ω
100W 75,000Ω
Mounting Hardware see http://www.ohmite.com/techdata/lug-mounting.php
Select 270 Type fixed resistors for applications
requiringwattageratingsfrom12to1000watts.
The270Typeresistorsareequippedwithlugtermi-
nals suitable for soldering or sturdy bolt connection.
Whensecuremountingisrequired,thehollowcore
of these resistors permit fastening with spring-type
brackets, thru bolts or thru bolts with slotted-steel
brackets.
Suitable for rugged applications, the 270 Type
resistors feature all-welded construction and durable
lead free vitreous enamel coating. Mounting brackets
not included with resistors.
FEATURES
•Terminalssuitableforsoldering
or bolt connection
•Highwattageapplications
•Ruggedleadfreevitreousenamelcoating
•Flameresistantcoating
•All-weldedconstruction
•RoHScompliantavailable
•“Faston”option–seeterminal538,
http://www.ohmite.com/techdata/terminals.pdf
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 113
Standard part numbers for 270 series
=Standardvalues;checkavailabilityusingtheworldwide
inventory search at www.ohmite.com
Red outlined values supplied in Silicone-Ceramic coatings
instead of vitreous enamel.
0.51 L12JKR51E
1 L12J1R0E
3.3 L12J3R3E
4.7 L12J4R7E
10 L12J10RE
12 L12J12RE
15 L12J15RE
22 L12J22RE
27 L12J27RE
33 L12J33RE
47 L12J47RE
68 L12J68RE
82 L12J82RE
100 L12J100E
150 L12J150E
1 –––1R0E
2 –––2R0E
3 –––3R0E
4 –––4R0E
5 –––5R0E
10 –––10RE
15 –––15RE
25 –––25RE
50 –––50RE
75 –––75RE
100 –––100E
125 –––125E
150 –––150E
200 –––200E
250 –––250E
500 –––500E
750 –––750E
800 –––800E
1,000 –––1K0E
1,500 –––1K5E
2,000 –––2K0E
180 L12J180E
270 L12J270E
330 L12J330E
390 L12J390E
470 L12J470E
560 L12J560E
1000 L12J1K0E
1200 L12J1K2E
1500 L12J1K5E
2200 L12J2K2E
2700 L12J2K7E
4700 L12J4K7E
10000 L12J10KE
18000 L12J18KE
22000 L12J22KE
51000 L12J51KE
2,500 –––2K5E
3,000 –––3K0E
3,500 –––3K5E
4,000 –––4K0E
5,000 –––5K0E
6,000 –––6K0E
7,500 –––7K5E
10,000 –––10KE
12,000 –––12KE
15,000 –––15KE
20,000 –––20KE
25,000 –––25KE
30,000 –––30KE
35,000 –––35KE
40,000 –––40KE
50,000 –––50KE
60,000 –––60KE
75,000 –––75KE
100,000 –––100KE
150,000 –––150KE
200,000 –––200KE
250,000 –––250KE
Ohmic
value 12 Watt
Ohmic
value 12 Watt
Ohmic value
L25J––– 25
L50J––– 50
L100J––– 100
L175J––– 175
Wattage
Part No.
Prefix
Suffix
L225J––– 225
L500J––– 500
L1000J–––1000
Ohmic value
L25J––– 25
L50J––– 50
L100J––– 100
L175J––– 175
Wattage
Part No.
Prefix
Suffix
L225J––– 225
L500J––– 500
L1000J–––1000
Tolerance
J= 5%
K= 10%
Core Diameter
See “Core and
Terminal Selection”
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
RoHS Compliant
Coating
270 = Vitreous
470 = Silicone Ceramic
Wattage
Terminal Type
See “Resistor Terminals
for Tubular Cores”
Non-inductive
Blank =Standard
N=Non-inductive
L25J100E
Tolerance
J= 5%
K= 10%
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS
Compliant
WattageSeries
Coating
Blank =Vitreous
C=Centohm
S=Silicone
Non-inductive
Blank =Standard
N=Non-inductive
F = Fast on
(optional)
See website for
custom core and
terminal info
L
DC
Series Wattage L D C Core Code* Std. Term.**
L12 12 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 57
L25 25 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 40
L50 50 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 40
L100 100 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 40
L175 175 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 46
L225 225 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 46
L500 500 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 45
L1000 1000 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 45
* http://www.ohmite.com/techdata/200-210-270-custom.pdf
** http://www.ohmite.com/techdata/terminals.pdf
DIMENSIONS
in./mm
ORDERING INFORMATION
270 Series
Vitreous Enamel Power
Standard Made-to-order
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114
280 Series
Corrib® Fixed and Adjustable
Vitreous Enamel Power
Moun.
PartNo. No.of Derat.
Slotted Elongated Resistors %
6110-81/2 6126-P-81/2 1 100%
- 6127-P-81/2 2 83%
- 6128-P-81/2 3 80%
- 6129-P-81/2 4 80%
Lugs for 300 Watt
Adjustable Corrib
RESISTOR HARDWARE
Thru Bolts Mounting Brackets for
300 Watt Corrib
Includestwoeachbracket,bolt,
washers (centering, mica, lock) and
nut.Note:Singleunitmounting
containsoneeachboltandnut;two
each all washers.
CHARACTERISTICS
Coating Lead free vitreous enamel except for extreme
low resistance 35 watt models, and very large
models (750 watts and up), which are supplied
in Silicone Ceramic
Core Tubular Ceramic
Terminals Tinned lug with hole. RoHS solder composition
is 96% Sn, 3.5% Ag, 0.5% Cu
Adjustable Lug Supplied with adjustable 300 watt models. Part
No. 1974-A or 1974-B
Resistance Max. 63Ω for 300W version
Tolerance ±10% (K)
Power rating Based on 25°C free air rating
Derating Linearly from 100% @ +25°C to 0% @ +400°C
Overload 10 times rated wattage for 5 seconds
Temperature
coefficient
±400 ppm/°C
Dielectric with-
standing voltage
1000 VAC measured from terminal to mounting
bracket
To calculate
max. amps
use the formula √P/R
Corrib® resistors are ideal for applications involving
highcurrentsatverylowresistancevalues—aslow
as 0.1Ω for the 300 Watt unit. These large, heavy-
dutyresistorsaredesignedtowithstandfrequent
start-stop cycles characteristic of motor starting,
dynamic braking and other similar applications.
Special order units are available to accommodate up
to 1500 watts.
Corribs® are manufactured with corrugated resis-
tive wire. To accelerate cooling, the wire is securely
fused to the ceramic core by the protective vitreous
enamel coating to improve durability. Corrib resis-
tors are hollow-core units which can be securely
fastened to chassis surfaces with thru bolts and
brackets.
FEATURES
•AlsoavailableinCentohmorSiliconecoating.
Consult Ohmite.
•Ribbedconstructionaidsinrapidcooling.
•Designedforequipmentrequiringlowresistance
loads at low ohmic values and high current capac-
ity.
•Especiallyconstructedformotorstarting,dynamic
braking, etc.
•RoHScompliantproductavailable.Add“E”suffixto
part number to specify.
Part No. Res. Part No. Res.
1974-A 0.40 1974-B 0.10
1/16 wire 0.50 1/8 wire 0.12
0.63 0.16
1.00 0.20
1.50 0.25
1.60 0.31
2.00 0.80
2.50 1.20
3.10
4.00
5.00
6.30
8.00
10.00
12.00
16.00
20.00
25.00
30.00
48.00
50.00
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 115
See website for
custom core info
Tolerance
F= 1%
H= 3%
J= 5%
K= 10%
(std.)
Ohms
Example:
R0200 = 0.02 7
R2000 = 0.2 7
2R500 = 2.5 7
10R00 = 10 7
Series
230 = Adjustable
280 = Fixed
480 = Silicone fixed
680 = Centohm fixed
Wattage &
Core Code
See “Core and
Terminal Selection”
Terminal Type
See “Resistor
Terminals for
Tubular Cores”
Tolerance
K= 10%
Ohms
example:
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS Compliant
Series
C = Fixed
E = Adjustable
Wattage
Coating
Blank =Vitreous
C=Centohm
S=Silicone
280 Series
Corrib® Fixed and Adjustable
Vitreous Enamel Power
ORDERING INFORMATION
Standard Made-to-order
Core and Terminal Selection for Made to Order Type
1500 2.50” 1.75” 20.0”(508.00mm) S 0.56 358 45
1000 (63.5mm) (44.45mm) 15.0”(381.00mm) S 0.41 258
750 12.0”(304.80mm) S 0.31 198
380 6.0”(152.40mm) S 0.13 78
550 1.625” 1.125” 11.75”(298.45mm) R 0.21 133 45
500 (41.28mm) (28.58mm) 10.50”(266.70mm) R 0.19 117
400 8.5”(215.90mm) R 0.14 91
270 1.50” 1.125” 5.0”(127.00mm) Q 0.065 41 45
(38.10mm) (28.58mm)
395 1.125” 0.75” 11.25”(285.75mm) P 0.14 87 45
375 (28.58mm) (19.05mm) 10.5”(266.70mm) P 0.13 80
300 8.5”(215.90mm) P 0.099 63
220 6.0”(152.40mm) P 0.063 39
185 5.0”(127.00mm) P 0.05 30
155 4.25”(107.95mm) P 0.038 25
140 4.0”(101.6mm) P 0.04 20
Free Air
Wattage
Rating D: OD C: ID L: Length
Code
for
Core
Dia. Min. Max.
Term.
Type
Core Dimensions Ohms
Free Air
Wattage
Rating D: OD C: ID L: Length
Code
for
Core
Dia. Min. Max.
Term.
Type
Core Dimensions Ohms
315 1.00” 0.625” 10.0”(254.00mm) N 0.11 67 45
215 (25.40mm) (15.88mm) 7.0”(177.60mm) N 0.068 43
190 6.0”(152.40mm) N 0.056 35
150 5.0”(127.00mm) N 0.043 27
125 4.0”(101.60mm) N 0.031 19
180 0.75” 0.50” 6.5”(165.10mm) M 0.031 29 45
160 (19.05mm) (12.70mm) 6.0”(152.40mm) M 0.038 26
140 5.0”(127.00mm) M 0.028 20
105 4.0”(101.60mm) M 0.020 14
100 3.5”(88.90mm) M 0.021 11
135 0.563” 0.313” 6.0”(152.40mm) K 0.028 21 46
110 (14.30mm) (7.95mm) 5.0”(127.00mm) K 0.029 16
90 4.0”(101.60mm) K 0.021 12 46
35 2.0”(50.80mm) K 0.0097 0.11
35 0.563” 0.313” 2.0”(50.80mm) K 0.12 5.6 40
(14.30mm) (7.95mm)
Standard part numbers for 280 series
C300KR10E
C300KR12E
C300KR20E
C300KR25E
C300KR31E
C300KR40E
C300KR50E
C300KR63E
C300K1R0E
C300K1R2E
C300K1R6E
C300K2R0E
C300K2R5E
C300K3R1E
C300K4R0E
C300K5R0E
C300K6R3E
C300K8R0E
C300K10RE
C300K12RE
C300K16RE
C300K20RE
E300K10RE
E300K12RE
E300K16RE
E300K1R0E
E300K1R6E
E300K20RE
E300K2R0E
E300K2R5E
E300K3R1E
E300K4R0E
E300K5R0E
E300K6R3E
E300K8R0E
E300KR10E
E300KR12E
E300KR16E
E300KR20E
E300KR25E
E300KR31E
E300KR40E
E300KR50E
E300KR63E
E300KR80E
L
DC
DIMENSIONS
NOTE: Wattages above
750 watts come with
silicone coating.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
116
Mounting Hardware
For 200, 210, 270 and 280 Series
=MostpopularStandardvalues
=Standardvalues
=Non-Standardvaluessubjecttominimumhandlingchargeperitem
Type Dimensions
Slotted A B C D E F G H
6101—E 0.781" — 0.75" 0.031" 0.438" 0.25" — —
6104—E 0.781" — 0.75" 0.031" 0.438" 0.25" — —
6110—E 1" — 1.125" 0.063" 0.813" 0.313" — —
Elongated
6120—E 1" — 0.5" 0.031" 0.422" 0.219" .438 .750
6126—E 1.5" — 1.25" 0.063" 0.438" 0.281" .563 .875
6127—E 1.5" 2" 1.25" 0.063" 0.438" 0.281" .563 .875
6128—E 1.5" 2" 1.25" 0.063" 0.438" 0.281" .563 .875
6129—E 1.5" 2" 1.25" 0.063" 0.438" 0.281" .563 .875
Std.
Core Bolt
Length Length
13/4" 21/4"
2" 21/2"
21/4" 23/4"
4" 43/4"
6" 65/8"
61/2" 7"
81/2" 91/8"
101/2 111/8
THRU-BOLTS AND MOUNTING BRACKETS
Sturdy plated steel brackets, along with
thru-bolts, centering washers and insulat-
ing washers (included), allow for secure
mounting of 210 type and 270 type resis-
tors. Mounting brackets are available in
either slotted (one with end-slot/one with
side-slot) or elongated styles.
mica washer
E
.063"
1.588 mm
F C
E
DA
centering washer
Slotted type
FC
E
H
Resistor length plus
.125" (3.175 mm)
G
mica washer DA
centering washer
B
Elongated type
ORDERING INFORMATION
More detailed information at http://www.ohmite.com/techdata/lug-mounting.php
6104-EM-6
1/2-E
No. of
Resistors
1
2
3
1
2
3
1
2
3
1
2
3
1
1
Bracket
6101
6102
6103
6104
6105
6106
6110A
6111A
6112A
6110
6111
6112
6113B
6114
Core
Code
K
M
N
P
R
S
Std. Core Length
in. mm
2
4
6
2
4
61/2
4
6
81/2
101/2
81/2
101/2
113/
119
119
119
170
170
170
252
252
252
375
4
12
15
20
6121-D-1
3/4-E
No. of
Resistors
1
2
1
2
3
4
1
2
3
4
Bracket
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
Core
Code
D
H
K
M
N
P
Standard Core
Length (in)
1
13/4
2
21/4
4
2
4
61/2
81/2
101/2
RoHS CompliantEuro lugSlotted Elongated
Euro lug
RoHS Compliant
(continued)
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WASHERS
One standard screwdriver type adjustable lug is sup-
plied with each unit.
Twotypesoflugscanbeorderedseparately:stan-
dardorwithasilvercontactbutton;bothtypesare
available with a screwdriver type lug.
Double thumb screw Lug (Part Number 2160E)
The double thumb screw adjustable lug permits
easier adjustment and less chance of damage to
resistancewire.Availablefor1.125"coresonly.
Metal Centering
Diameter For max. For resistors
Part No. Outer Inner screw size (power ratings)
 6000E 0.563" 0.313 #10 25,50,75watt
 6001E 0.75" 0.5 #10 100watt
 6003E 1.125" 0.75 0.25" 175,225watt
Mica insulating
Diameter For resistors
Part No. Outer Inner (power ratings)
 6010E 0.75" 0.625" 25,50,75watt
 6011E* 0.75" 0.313" 25,50,75watt
 6012E 1" 0.625" 100watt
 6013E* 1" 0.5" 100watt
 6014E 1.25" 0.625" core1"O.D.x0.625"I.D.
 6015E* 1.25" 0.625" core1"O.D.x0.625"I.D.
 6016E 1.5" 0.625" 175,225watt
6017E* 1.5" 0.75" 175,225watt
*Usewithcenteringwashers.
Resistor core diam. Standard part numbers
(O.D., in. / mm) Standard Silver
0.313 / 7.94 2115E 2116E
0.563 / 14.3 2121E 2123E
0.750 / 19.05 2125E 2127E
1.125 / 28.58 2133E 2135E
Mounting Hardware
For 200, 210, 270 and 280 Series
=MostpopularStandardvalues
=Standardvalues
=Non-Standardvaluessubjecttominimumhandlingchargeperitem
ADJUSTABLE LUGS
FOR 210 SERIES
Thru-Bolts, with centering washers and mica insulat-
ing washers, permit perpendicular mounting of 200,
210and270typeresistorstopanelsupto0.25"
thick.
Bolt size For resistors
Part No. Length No. (power rating)
7PA5E 1.75" 8 8watt
7PA10E 2.5" 8 12watt
7PA20E 2.75" 8 20watt
7PA25E 2.75" 10 25watt
7PA50E 4.75" 10 50watt
7PA75E 6.75" 10 75watt
7PA100E 7.313" 10 100watt
7PA160E 9.5" 0.25" 175watt
7PA200E 11.5" 0.25" 225watt
Brackets fit inside cores of 200, 210 and 270 type
resistors and remain in place by spring tension.
Standard brackets are plated steel and have no suffix
to part number. Spring steel brackets are indicated
withan“S”suffixfollowingpartnumber.
Part number Mtg screw For resistors
Standard Spring steel size (max.) (power ratings)
5E 5SE 6 8, 12 watt
7E 7SE 6 20 watt
9E 9SE 6 25, 50, 75 watt
12E 12SE 10 100 watt
18E 18SE 10 175, 225 watt
MOUNTING BRACKETS THRU BOLTS
More detailed information at http://www.ohmite.com/techdata/lug-mounting.php
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118
Resistor Terminals
Resistor Terminals for Tubular Cores
E
0.188 in. ±0.031
4.763 mm
±
0.794
Dia.
0.104 in. ±0.015
2.642 mm
±
0.381
0.438 in.
+0.047/-0.031
11.113 mm
+1.191/-0.794
Min. 0.016 in.
0.407 mm
Type 57
Type 40 and 40A
Type 46 and 46A
Type 44, 44A, 45, 45A, 45B
E
0.250 in. ±0.031
6.350 mm
±
0.794
Dia.
0.166 in. ±0.015
4.217 mm
±
0.381
0.563 in. ±0.031
14.300 mm
±
0.794
Min. 0.016 in.
0.407 mm
E
0.375 in. ±0.031
9.525 mm
±
0.794
Dia.
0.173 in.
+0.015/-0.005
4.394 mm
+0.381/-0.127
0.625 in. ±0.031
15.875 mm
±
0.794
Min. 0.032 in.
0.813 mm
E
0.500 in. ±0.031
12.700 mm
±
0.794
Dia.
Type 44: 0.265 in.
Type 45: 0.196 in.
+0.015/-0.006
Type 44: 6.731 mm
Type 45: 4.979 mm
+0.381/-0.153
Min. 0.032 in.
0.813 mm
0.750 in. ±0.031
19.050 mm
±
0.794
Type 47 and 48 Type 48R
Type 126 and 126R
Type 58
E
0.032 in.
0.794 mm
0.188 in. +0.094/-0
4.775 mm +2.388/-0
Type 48Type 47
0.188 in. +0.094/-0
4.775 mm +2.388/-0
E
0.125 in.
3.175 mm
0.188 in. +0.125/-0
3.175 mm +2.388/-0
Type 126Type 126R
0.250 in. ±0.032
6.35 mm
±
0.813
E
Type 532
Type 538
Type 535
0.188 in.
4.763 mm
E
Dia.
0.063 in.
1.588 mm
0.469 in.
+0.063/-0.031
11.906 mm
+1.588/-0.794
0.020 in.
0.508 mm
0.250 in.
6.350 mm
E
Dia.
0.065 in.
1.651 mm
max.
0.844 in.
21.438 mm
0.032 in.
0.813 mm
0.250 in.
6.350 mm
E
Dia.
0.065 in.
1.651 mm
max.
0.875 in.
22.225 mm
0.032 in.
0.813 mm
Other Terminals
Type 49
.250 (6.35mm) wide x
0.313 (7.950mm)
.166 (4.217mm) dia.
hole. Solder coated.
Type 50
Untinned lug intended for
welded connection.
0.063 (1.600mm) x
height as specified.
Type 51
.125 (3.175mm) wide
x height as specified.
0.072 (1.829mm) hole.
Solder coated.
Type 52
For “wire wrap” (Keller,
Gardner-Denver T.M.)
Type 68
.188 (4.775mm) wide
x 0.531 (13.488mm)
high. Solder coated.
Type 69
.125 (3.175mm) wide
x 0.375 (9.525mm)
high. Solder coated.
(continued)
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Resistor Terminals
Resistor Terminals for Tubular Cores
B B
C
D
A
Type 141
Type 63
Cores 0.563 (14.288mm) to 0.750 (19.050mm) O.D. --- Cat No. 63/12
Cores 1.000 (25.400mm) to 1.125 (28.575mm) O.D --- Cat No. 63/18
Type 140
For Cores 0.438 (11.113mm) to 1.125 (28.575mm) O.D.
Length
0.0625 in.
±0.031 in.
±
0.794 mm
Dia.
±0.016 in.
±
0.397 mm
Brass,
nickel-plated
1.588 mm
(Washer
as specified)
Plug
Length
±0.063 in.
±
1.588 mm
Dia.
+0.047/-0.031 in.
+1.191/-0.794 mm
Edge Distance—Dimension “E”
Core O.D.
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm
Terminals .250 6.350 .313 7.938 .438 11.113 .563 14.288 .750 19.050 1.00 25.40 1.125 28.575 1.500 38.100 1.625 41.275 2.500 63.500
40-40A-49-50-
57-68-69-126- .031 .794 .094 2.381 .094 2.381 .094 2.381 .125 3.175 .156 3.969 .219 5.556 — — — — — —
126R-532
44-44A-45-45A-
45B-46-46A — — — — — — .250 6.350 .250 6.350 .250 6.350 .250 6.350 — — — — — —
535-538 — — .125 3.175 .125 3.175 .125 3.175 .125 3.175 .156 3.969 .219 5.556 .250 6.350 .250 6.350 .500 12.700
Dimension“E”canbevariedandisoftenreducedforcores2.00 (50.80mm) or less in length or sometimes increased for greater leakage distance to ground.
Toleranceon“E”is±0.016 (.397mm) up to 0.125 (3.175mm) and ± 0.063 (1.588mm) above.
Ferrule Catalog No.
Diameter Length No With
In. mm In. mm Washer Washer
.563 14.288 .500 12.700 140/9* 140/19
.688 17.463 .563 14.288 140/11* 140/01
.813 20.638 .500 12.700 140/13† 140/03
1.125 28.575 .500 12.700 140/18
*Upthru0.563(14.288mm)Dcore.
†Upthru0.750(19.050mm)
Ferrule Catalog Core
Diameter Length No. O.D.
In. mm In. mm In. mm
.625 15.875 .625 15.875 141/10 .563 14.288
.813 20.638 .688 17.463 141/13 .750 19.050
1.062 26.988 .688 17.463 141/17 1.000 25.400
1.188 30.163 .688 17.463 141/19 1.125 28.575
Ferrulesarebrass,naturalfinish.
A B C D
Cat. ±.031 (.794) ± .031 (.794) ±.031 (.794) (Min.)
No. In. mm In. mm In. mm In. mm
63/12 .781 19.844 .438 11.113 .750 19.050 .250 6.350
63/18 .875 22.225 .813 20.638 1.125 28.575 .313 7.938
Terminal Dimensions
Terminal W H T P CoreDiameterRange
Type in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)
40, 40A 0.25 ± 0.031 (6.35 ± 0.794) 0.563 ± 0.031 (14.3 ± 0.794) min 0.016 (0.407) 0.166 ± 0.015 (4.217 ± 0.381) 0.313-1.125 (7.95-28.575)
44, 44A 0.5 ± 0.031 (12.7 ± 0.794) 0.750 ± 0.031 (19.05 ± 0.794) min 0.032 (8.13) 0.265+0.015/-0.006 (6.731 +0.381/ -0.153) 0.75-1.125 (19.05-28.575)
45, 45A, 45B 0.5 ± 0.031 (12.7 ± 0.794) 0.750 ± 0.031 (19.05 ± 0.794) min 0.032 (8.13) 0.196+0.015/-0.006 (4.979 +0.381/ -0.153) 0.75-1.125 (19.05-28.575)
46, 46A 0.375 ± 0.031 (9.525 ± 0.794) 0.625 ± 0.031 (15.875 ± 0.794) min 0.032 (8.13) 0.173+0.015/-0.005 (4.394 +0.381/ -0.127) 0.563-1.50 (14.3-38.1)
47, 48, 48R 0.125 ± 0.031 (3.175 ± 0.794) 0.188+0.094/-0 (4.775+2.38/-0) N/A N/A 0.0210-0.563 (5.25-14.3)
57 0.188 ± 0.031 (4.763 ± 0.794) 0.438 (11.113 min 0.016 (0.407) N/A 0.25-0.75 (6.35-19.05)
+0.047/-0.031 +1.191/-0.794)
58 0.125 ± 0.031 (3.175 ± 0.794) 0.188+0.094/-0 (4.775+2.38/-0) N/A N/A 0.0210-0.563 (5.25-14.3)
126, 126R 0.125 ± 0.031 (3.175 ± 0.794) 0.188+0.094/-0 (4.775+2.38/-0) N/A N/A 0.313-1.125 (7.95-28.575)
532 0.188 ± 0.031 (4.763 ± 0.794) 0.469 (11.906 0.020 (0.508) 0.063 (1.588) 0.313-1.125 (7.95-28.575)
+0.063/-0.031 +1.588/-0.794)
535 0.25 ± 0.031 (6.35 ± 0.794) max 0.875 (22.225) 0.032 (8.13) 0.065 (1.651) 0.313-2.5 (7.95-63.5)
538 0.25 ± 0.031 (6.35 ± 0.794) max 0.844 (21.438) 0.032 (8.13) 0.065 (1.651) 0.313-2.5 (7.95-63.5)
40A- Has screw #6-32 x .5 with 2 nuts and washers, 44A- Has screw 20 x .625 with 2 nuts and washers, 45A- Has screw #8-32 x .625 with 2 nuts and washers, 45B- Has screw #10-32 x .625 with 2
nuts and washers, 46A- Has screw #8-32 x .625 with 2 nuts and washers
W
Dia.
PH
T
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120
Resistor Cores
Core and Terminal Selection for Type 200, 270, 400 and 470 Tubular Resistors
3* 0.438”(11.1mm) 0.210”(5.25mm) 0.130”(3.17mm) AA 0.13 3.48K 48,58
5.25* 0.625”(15.9mm) 0.250”(6.35mm) 0.135”(3.43mm) CA 0.19 7.06K 48,58
6.5 1.0”(25.4mm) 0.250”(6.35mm) 0.125”(3.18mm) CA 0.10 2.30K 27.3K 57
8* 1.0”(25.4mm) 0.313”(7.95mm) 0.188”(4.76mm) D 0.10 2.16K 17.1K 48,57
12* 1.75”(44.5mm) 0.313”(7.95mm) 0.188”(4.76mm) D 0.10 6.52K 51.6K 48,57
11 1.0”(25.4mm) 0.438”(11.1mm) 0.250”(6.35mm) H 0.10 3.02K 28.2K 57
15 1.5”(38.1mm) 0.10 6.03K 56.4K 40
20* 2.0”(50.8mm) 0.11 10.1K 94.0K 48-40
26 3.0”(76.2mm) 0.21 18.1K 169.0K 40
25* 2.0”(50.8mm) 0.563”(14.3mm) 0.313”(7.95mm) K 0.15 12.9K 100.0K 40
35 3.0”(76.2mm) 0.26 23.2K 180.0K
50* 4.0”(101.6mm) 0.38 33.5K 260.0K
60 5.0”(127.0mm) 0.50 43.8K 340.0K
75* 6.0”(152.4mm) 0.61 54.1K 420.0K
24 1.5”(38.1mm) 0.750”(19.1mm) 0.50”(12.7mm) M 0.10 9.49K 12.2K 40
30 2.0”(50.8mm) 0.10 16.4K 21.1K
45 3.0”(76.2mm) 0.10 30.2K 38.8K
51 3.5”(88.9mm) 0.11 37.1K 47.6K
61 4.0”(101.6mm) 0.13 44.0K 56.5K
65 4.5”(114.3mm) 0.15 50.9K 65.3K
76 5.0”(127.0mm) 0.17 57.8K 74.2K
90 6.0”(152.4mm) 0.21 71.6K 91.9K
100* 6.5”(165.1mm) 0.23 78.5K 101.0K
52 3.0”(76.2mm) 1.0”(25.4mm) 0.625”(15.9mm) N 0.11 25.3K 40
70 4.0”(101.6mm) 0.17 37.2K
85 5.0”(127.0mm) 0.22 49.1K
105 6.0”(152.4mm) 0.27 61.0K
112 6.5”(165.1mm) 0.30 67.1K
120 7.0”(177.8mm) 0.33 72.9K
140 8.0”(203.2mm) 0.38 84.8K
176 10.0”(254.0mm) 0.49 109.0K
40 2.0”(50.8mm) 1.125”(28.6mm) 0.75”(19.1mm) P 0.10 9.63K 46
80 4.0”(101.6mm) 0.10 37.7K
95 5.0”(127.0mm) 0.10 51.7K
121 6.0”(152.4mm) 0.10 65.7K
130 6.5”(165.1mm) 0.10 72.7K
160 8.0”(203.2mm) 0.12 93.7K
175* 8.5”(215.9mm) 0.13 101.0K
225* 10.5”(266.7mm) 0.16 129.0K
235 11.25”(285.8mm) 0.18 139.0K
251 12.0”(304.8mm) 0.19 150.0K
150 5.0”(127.0mm) 1.5”(38.1mm) 1.125”(28.6mm) Q 0.10 34.2K 45
220 8.5”(215.9mm) 1.625”(41.3mm) 1.125”(28.6mm) R 0.18 75.0K 45
275 10.5”(266.7mm) 0.23 96.6K
300 11.75”(298.5mm) 0.26 110.0K
250 6.0”(152.4mm) 2.5”(63.5mm) 1.75”(44.5mm) S 0.15 6.11K 45
500 12.0”(304.8mm) 0.38 15.4K
750 15.0”(381.0mm) 0.50 20.0K
1000 20.0”(508.0mm) 0.69 27.7K
*Thesecoresizesareusedforthestandarditems.Seethelistingoftheresistance
values under Types 200, 210 and 270
**SeeApplicationNote“ResistorTerminalsforTubularCores,”page35.
Limitwattage
to 78% of
free air watts
and working
voltsto500V
per inch of
winding space
between
terminal edges
Limitscontrolledby
free air watts and
workingvoltsto500V
per inch of winding
space between
terminal edges
Free Air
Wattage
Rating Length
Outside
Diameter
Inside
Diameter
Code
for
Core
Dia.
Min.
Ohms
For
Ohms
Over
Limit Watts
and Working
Voltage to
Max.
Possible
Ohms
Standard
Terminal**
Limitscontrolledbyfreeair
watts and max. possible ohms
Nominal Core Dimensions
Critical Resistance Limiting Factors
Maximum Diameter Over
Coating: The overall diameter
of a finished resistor includes
the build-up due to wire diame-
ter, coating and terminal mate-
rial. This results in a possible
maximum increase in diameter
of 0.188 (4.763mm) for low
resistance, 1.125 (28.575mm)
O.D. core resistors and larger;
0.156 (3.969mm) for resistors
with smaller diameter cores.
On all high resistance units the
increase is generally less than
0.125 (3.175mm).
Other Core Sizes: Many other
specials are available includ-
ing cores with special inside
diameter listed at right.
Cores with
Non-standard I.D. (or O.D.)
O.D. I.D. Code
0.313” 0.219” DA
(7.938mm) (5.556mm)
0.438” 0.313” HA
(11.113mm) (7.938mm)
0.563” 0.391” KA
(14.288mm) (9.922mm)
0.625” 0.453” LA
(15.875mm) (11.509mm)
0.750” 0.547” MA
(19.050mm) (13.891mm)
0.938” 0.563” UA
(23.813mm) (14.288mm)
1.125” 0.875” PA
(28.575mm) (22.225mm)
Tolerance on Nominal Core Dimensions
Length Tolerance
0.438 (11.113mm) to 4.00 (101.60mm) ±0.031 (0.794mm)
Over 4.00 (101.60mm) to 6.50 (165.10mm) ±0.047 (1.191mm)
Over6.50(165.10mm)to11.25(285.575mm) +0.063(1.588mm)/-0.094(2.381mm)
Over 11.25 (285.575mm) to 20.0 (0.508mm) ±0.125 (3.175mm)
Tolerances do not include effect of longitudinal camber.
I.D. Tolerance
To 0.500 (12.700mm) ±0.016 (0.397mm)
Over 0.500 (12.700mm) to 1.125 (28.575mm) ±0.031 (0.794mm)
Over 1.125 (28.575mm) to 1.750 (44.450mm) ±0.063 (1.588mm)
0.1 8.0K 155 15.8K
0.1 15.0K 281 34.0K
21.6K 375 45.4K
0.1 9.87K 281 42.8K
50.0K 775 50.4K
0.1 7.18K 281 35.3K
21.1K 563 70.5K
44.0K 938 118.0K
110.0K 1690 212.0K
0.1 35.2K 938 151.0K
81.6K 1690 272.0K
119.0K 2440 393.0K
170.0K 3190 340.0K
207.0K 3940 420.0K
0.1 11.1K 516 73.6K
26.6K 893 127.0K
59.8K 1640 234.0K
80.0K 2020 288.0K
93.6K 2390 341.0K
118.0K 2770 395.0K
130.0K 3140 448.0K
168.0K 3890 555.0K
182.0K 4270 609.0K
0.1 49.2K 1600 305.0K
78.9K 2350 448.0K
113.0K 3100 591.0K
141.0K 3850 734.0K
159.0K 4220 805.0K
176.0K 4600 877.0K
204.0K 5350 1.02M
267.0K 6850 1.31M
0.1 6.66K 516 89.3K
51.0K 2020 328.0K
80.8K 2770 450.0K
102.0K 3520 572.0K
116.0K 3890 633.0K
158.0K 5020 816.0K
166.0K 5390 877.0K
211.0K 6890 1.12M
237.0K 7460 1.21M
257.0K 8030 1.31M
0.1 44.4K 2580 433.0K
0.1 123.0K 5210 351.0K
164.0K 6710 452.0K
195.0K 7650 516.0K
0.1 35.0K 2960 86.3K
111.0K 7460 218.0K
125.0K 9680 283.0K
180.0K 13400 392.0K
Min.
Ohms
For
Ohms
Over
Limit
Working
Voltage to
Max.
Possible
Ohms
Critical Resistance Limiting Factors
VITREOUS ENAMEL COATED OHMICONE® SILICONE COATED
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 121
The heavy duty construction of the Power-Mox
series make them durable in most high voltage
industrial applications. This product is well known
for its high voltage ratings, low voltage coefficients,
very high ohmic values, and resistor divider options.
Terminations can be selected to adapt to most
mounting schemes.
FEATURES
•Wideresistanceranges
•Outstandingvoltagecoefficient
•0.4”diameterferrule,0.25”-20threadedendcap,or
radial bands available
•Metaloxideresistiveelements
Power-Mox
Precision Power Thick Film
High Voltage/High Resistance Tubular
A
B
0.5" typ.
Ohmite Resistance Power Voltage Available
Series Range (Ohms) @25°C Rating Tolerances*
MOX-F 1K to 800,000M 25W 20KV 0.5, 1, 2, 5%
MOX-G 1.5K to 1,000,000M 40W 30KV 0.5, 1, 2, 5%
MOX-H 2K to 1,000,000M 50W 45KV 0.5, 1, 2, 5%
MOX-J 3K to 1,000,000M 75W 60KV 0.5, 1, 2, 5%
*Some tolerances are not available over the entire resistance range
MOX-JN -041006FE
Power Mox
Series
Terminal
01 = Silver termination only
02 = Radial band
03 = 0.4" Ferrule
04 = 1/4 X 20 threaded
Ferrule cap
Style
F, G, H, J
Tolerance
D= 0.5%
F= 1%
G= 2%
J= 5%
K=10%
M=15%
P=20%
Ohms
First 3 digits are
significant; 4th digit is
multiplier (# of zeroes
to follow). Examples:
10R2 = 10.2 ohms
1000 = 100 ohms
1503 = 150,000 ohms
E = RoHS CompliantNon-inductive
APPLICATIONS
•PowerTransmitters
•PollutionControlSystems
•IndustrialControlSystems
•Currentpulselimiters
•Vacuumandspaceapplication
SERIES SPECIFICATIONS
CHARACTERISTICS
Core Ceramic
Coating Varnish
Resistance Range 1K to 1,000,000M
Power Rating to 75W
Voltage Rating to 60KV
Operating Temperature -65°C to +180°C
Temperature Coefficient 25ppm: 0° to 85°C;
50ppm: -55° to 180°C
Ohmite Power A B
Series @25°C ± 0.05 Max
MOX-F 25W 3.0" / 76.2 0.770" / 19.56
MOX-G 40W 4.5" / 114.3 0.770" / 19.56
MOX-H 50W 6.0" / 152.4 0.770" / 19.56
MOX-J 75W 8.0" / 203.2 0.770" / 19.56
DIMENSIONS
(in./mm)
ORDERING INFORMATION
Non inductive
version shown
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122
Power-Mox Dividers
Precision Power Thick Film
High Voltage/High Resistance Tubular Dividers
“01” Lead
“Power-Mox RD” Series
with silver terminations
“02” Lead
“Power-Mox” Series with
radial band option
A
B
0.25"
0.75"
no. 6-32 x 0.25" screw
no. 6-32 hex nut
“04” Lead
“Power-Mox” Series with
1/4 - 20 threaded end caps
“03” Lead
“Power-Mox” Series
with Ferrule end caps
A+0.12"
0.4"
0.89"
A+0.96"
A +0.55" max.
A +0.15" max.
0.825" max. 1/4-20 threads
(2 places)
A
B
1.5" typ.0.5" typ.
Ohmite Resistance Power Voltage Maximum Ratio
Series Range (Ohms) @25°C Rating Ratio Tolerances
MOX-FRD 20K to 2,500M 15W 15KV 5,000:1 1, 2, 5%
MOX-GRD 20K to 4,000M 30W 25KV 5,000:1 1, 2, 5%
MOX-HRD 20K to 6,000M 40W 35KV 5,000:1 1, 2, 5%
MOX-JRD 20K to 6,000M 60W 50KV 5,000:1 1, 2, 5%
POWER-MOX ALTERNATE TERMINALS
To specify Power-Mox Dividers, please see our website at:
www.ohmite.com/dividers
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 10050
80
40
150 200
180°
25°
SERIES SPECIFICATIONS
(dimensions as for Power-Mox) DERATING
ORDERING INFORMATION
AcompletedescriptionofthePower-MOXDivideris
required.EXAMPLE:
RT=500MΩ 5%
R1=499.5MΩ 5%
R2=500KΩ 1%
Ratio=RT/R2=1,000:1,1%
TospecifyPower-MoxDividers,pleaseseeourweb-
site at www.ohmite.com/dividers. Contact Ohmite
for custom configurations.
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HSP Series
Hermetically Sealed, Precision,
Ultra-High Stability, Axial Terminals
Max. Resistance* Power Rating Max. Voltage
Model (ohms) @ 25°C (watts) (volts)
HS185A 1.0M 0.125 300
HS205A 1.4M 0.25 300
HS207A 2.8M 0.40 600
HS210A 3.0M 0.50 600
HS308A 5.6M 0.60 600
HS310A 7.6M 0.80 600
HS510A 24M 1.00 600
HS515A 35M 1.25 600
HS520A 43M 1.50 900
*Minimum Value = 10Ω
Power D B C
Model Rating ±0.010/0.254* ±0.020/0.508 ±0.030/0.762
HS185A 0.125 0.187 / 4.75 0.500 / 12.70 0.625 / 15.88
HS205A 0.25 0.250 / 6.35 0.500 / 12.70 0.562 / 14.27
HS207A 0.40 0.250 / 6.35 0.750 / 19.05 0.812 / 20.62
HS210A 0.50 0.250 / 6.35 1.00 / 25.40 1.063 / 27.00
HS308A 0.60 0.375 / 9.52 0.820 / 20.80 0.920 / 23.35
HS310A 0.80 0.375 / 9.52 1.00 / 25.40 1.050 / 26.67
HS510A 1.00 0.500 / 12.70 1.05 / 25.40 1.220 / 30.99
HS515A 1.25 0.500 / 12.70 1.50 / 38.10 1.605 / 40.77
HS520A 1.50 0.500 / 12.70 2.00 / 50.80 2.160 / 54.86
*Clear sleeving available, add 0.040"/ 1.016mm to body diam.
FEATURES
•Accuracyto±0.001%absolute
•Shelflifeto10ppm/year
•Temperaturecoefficientto±3ppm/°C,-10°Cto
+80°C
•Lowvoltagecoefficient
•Lownoise
•ExtremelylowthermalEMF
•Availablein4-terminalonHS500series
•Oil-filledversionavailable
B
C
D
1.50 / 38.10
min.
20 AWG
(0.032 / 0.813)
ex. HS185A:
22 AWG
(0.026 / 0.660)
HS185AS L 1M000T
Type Tolerance
T=0.01%
Q=0.02%
A=0.05%
B=0.1%
C = 0.25%
D = 0.5%
F=1.0%
Resistance
1R000 = 1 Ω
10R00 = 10 Ω
100R0 = 100 Ω
1K000 = 1000 Ω
10K00 = 10 KΩ
100K0 = 100 KΩ
1M000 =1 MΩ
Oil-Filled
A = Non oil-filled
F = Oil-filled
Wattage
185 = 0.125W
205 = 0.25
207 = 0.40
210 = 0.50
308 = 0.60
310 = 0.80
510 = 1.00
515 = 1.25
520 = 1.50
Sleeving
SL = with sleeving
blank = without
Part Marking
• Ohmite
• Model
• Resistance value
• Resistance tolerance
• Date code
SERIES SPECIFICATIONS
ORDERING INFORMATION
DIMENSIONS
(in./mm)
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124
HPW Series
High Precision Welded Axial and Radial
Commercial Resistors Tested to Mil-PRF-39005
Power Rating
Max. @125°C Max.
Type Ohms (Watts) Volts
118A 192k 0.05 150
102A 334k 0.10 150
101A 410k 0.10 300
153A 435k 0.10
103A 633k 0.10 150
105A 820k 0.125
184A 820k 0.125 300
185A* 961k 0.125 300
202A 968k 0.25 200
203A 1.7 M 0.25 200
205A* 1.93 M 0.33 400
207A* 3.0 M 0.50 800
308A 3.0 M 0.60 800
210A* 4.10 M 0.50 800
307A 5.63 M 0.60
310A 7.68 M 1.00 800
505A 10 M 1.00
510A* 24 M 1.25 800
515A* 35 M 1.50 1200
517A 43 M 1.75 1200
520A* 43 M 2.00 1200
203PA 1.48 M 0.25 150
305PA 3.3 M 0.50
*Available in hermetically sealed
Minimum Values 0.1Ω for ±1% and ±0.5%; 10Ω for ±0.1% and tighter
Resistance
Tolerance
±0.005%, ±0.01%, ± 0.02%, ±0.05%, ±0.1%, ±0.5%,
and ±1%, depending on style and value
Temperature
Coefficient (TCR
±10ppm/°C standard for 10Ω and above. Higher TC’s
on low ohmic values. TC match to ±1ppm/°C. High
TC’s upto +6000ppm/°C are available
Working tempera-
ture range
–60°C to +150°C
All Welded
Construction
The combination of all welded construction and com-
patible materials provide the most reliable means of
interconnects possible.
Butt Weld of Tab to
Terminal
A tab material of 800 ohm alloy (the same as the
resistance wire) is butt welded to the terminal and
molded deep into the resistor bobbin. This design
parameter assures the least possible DC transients
due to thermal EMF.
Bobbin Design The ratio of the height of the Pi wall to the width of
the Pi and to the diameter of the bobbin mandrel are
critical to the basic stability of a wirewound resistor.
These parameters are optimized for each wire size,
wattage size and range of resistor values.
Encapsulation
Material
Both the bobbin and the final encapsulation material
are thermosetting alkyd polyester. The resulting resis-
tor is virtually a homogeneous mass with an identical
coefficient of expansion which is unaffected by the
most violent of temperature cycling. All types are
unaffected by application of solvents.
Terminal Materials The standard terminal material is hot solder dipped
copper (C5N).
Military Group A MIL-PRF-39005 testing
Burn In/Conditioning including Thermal Shock
DC Resistance
Visual/Mechanical Inspection
Short Time Overload
FEATURES
SERIES SPECIFICATIONS CHARACTERISTICS
(continued)
•GroupAtestingin
accordancewithMIL-
PRF-39005specifications
available
•Highprecision
•Allweldedconstruction
•Moldedthermosetting
plastic bobbin
•Wideohmicrange
combined with tight
tolerance
•Excellentlong-term
stability
•Inherentlow
temperature coefficient
•ExtremelylowThermal
EMF
•Lowvoltagecoefficient
•Lownoise
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 125
Type Power Rating A B AWG Lead Diam.
118A 0.05 0.130 / 3.30 0.180 / 4.57 26 0.016 / 0.406
102A 0.10 0.110 / 2.79 0.250 / 6.35 24 0.020 / 0.508
101A 0.10 0.130 / 3.30 0.375 / 9.53 22 0.026 / 0.660
153A 0.10 0.150 / 3.81 0.245 / 6.22 22 0.026 / 0.660
103A 0.10 0.150 / 3.81 0.300 / 7.62 22 0.026 / 0.660
105A 0.125 0.160 / 4.06 0.500 / 12.70 22 0.026 / 0.660
184A 0.125 0.187 / 4.75 0.375 / 9.53 22 0.026 / 0.660
185A* 0.125 0.187 / 4.75 0.500 / 12.70 22 0.026 / 0.660
202A 0.25 0.250 / 6.35 0.310 / 7.87 22 0.026 / 0.660
203A 0.25 0.250 / 6.35 0.343 / 8.71 20 0.032 / 0.813
205A* 0.33 0.250 / 6.35 0.500 / 12.70 20 0.032 / 0.813
207A* 0.50 0.250 / 6.35 0.750 / 19.05 20 0.032 / 0.813
308A 0.60 0.312 / 7.93 0.810 / 20.57 20 0.032 / 0.813
210A* 0.50 0.250 / 6.35 1.00 / 25.40 20 0.032 / 0.813
307A 0.60 0.375 / 9.53 0.750 / 19.05 20 0.032 / 0.813
310A 1.00 0.375 / 9.53 1.00 / 25.40 20 0.032 / 0.813
505A 1.00 0.500 / 12.70 0.500 / 12.70 20 0.032 / 0.813
510A* 1.25 0.500 / 12.70 1.00 / 25.40 20 0.032 / 0.813
515A* 1.50 0.500 / 12.70 1.50 / 38.10 20 0.032 / 0.813
517A 1.75 0.500 / 12.70 1.75 / 44.45 20 0.032 / 0.813
520A* 2.00 0.500 / 12.70 2.00 / 50.8 20 0.032 / 0.813
203PA 0.25 0.270 / 6.86 0.320 / 8.13 22 0.026 / 0.660
305PA 0.50 0.375 / 9.53 0.500 / 12.70 20 0.032 / 0.813
*Available in hermetically sealed
BA
1.25" / 31.75mm
min.
AB
C
Round Radial
Axial
Model Dim. C
203PA 0.200 / 5.08
305PA 0.200 / 5.08
505PA 0.300 / 7.62
203MA1M700T
Type Tolerance*
V=0.005%
T=0.01%
Q=0.02%
A=0.05%
B=0.1%
C = 0.25%
D = 0.5%
F=1.0%
Military
Group A
“M” characteristic does
not indicate product is
QPL to Mil-PRF-39005
Resistance
1R000 = 1 Ω
10R00 = 10 Ω
100R0 = 100 Ω
1K000 = 1000 Ω
10K00 = 10 KΩ
100K0 = 100 KΩ
1M700 = 1.7 MΩ
Format*
A = axial
PA = round radial
*All formats and
tolerances not
available in all
values
HPW Series
High Precision Welded Axial and Radial
Commercial Resistors Tested to Mil-PRF-39005
DIMENSIONS
(±.020 in./ ±.508 mm)
HOW TO ORDER
Conversion of RBR to
Commercially-tested Product
RBR52 310MAxxxxxx
RBR53 307MAxxxxxx
RBR54 207MAxxxxxx
RBR55 205MAxxxxxx
RBR56 203MAxxxxxx
RBR71 203MPAxxxxxx
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126
FEATURES
•HighStability:±0.5%∆R
•Highpowertosizeratio
•Metalhousingallowschassismountingandpro-
vides heat sink capability
89 Series
Metal-Mite® Aluminum Housed
Axial Terminal Wirewound, 1% Tolerance
Series Wattage Ohms Voltage
805 5 0.10-25K 210
810 10 0.10-50K 320
825 25 0.010-75K 520
850 50 0.005-100K 1170
Non-Inductive versions available. Insert “N” before tolerance code.
Example: 850NF560
The 89 Series is a high-performance axial type
resistor. These molded-construction metal-housed
resistors are available in higher power ratings than
standard axial resistors and are better suited to with-
standing vibration, shock and harsh environmental
conditions.
The 89 Series Metal-Mite® resistors are aluminum
housed to maintain high stability during operation
and to permit secure mounting to chassis surfaces.
The metal housing also provides heat-sinking
capabilities.
Housing Metal, anodized aluminum
Internal Coating Silicone
Core Ceramic
Terminals Solder-coated axial
Derating Linearly from 100% @ +25°C to 0% @ +275°C.
Tolerance ±1% and ±5% (other tolerances available).
Power rating Rating is based on chassis mounting area and temperature stability. Proper heat sink as follows: 5W and
10W units, 4” x 6” x 2” x .040” Aluminum chassis; 25W units, 5” x 7” x 2” x .040” Aluminum chassis;
50W units, 12” x 12” x .059” Aluminum panel.
Maximum ohmic values See chart.
Overload 5 times rated wattage for 5 seconds.
Temperature coefficient Under 1Ω: ±90 ppm/°C; 1 to 9.99Ω: ±50 ppm/°C; 10Ω and over: ±20 ppm/°C.
Dielectric withstanding voltage 5W and 10W rating,1000 VAC; 25 and 50W ratings, 2250 VAC.
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
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0.005 –––R005
0.010 –––R010
0.025 –––R025
0.1 –––R10
0.3 –––R30
0.5 –––R50
0.7 –––R70
1.0 –––1R0
1.5 –––1R5
2.0 –––2R0
3.0 –––3R0
4.0 –––4R0
5.0 –––5R0
10.0 –––10R
15.0 –––15R
20 –––20R
25 –––25R
30 –––30R
40 –––40R
50 –––50R
75 –––75R
100 –––100
150 –––150
200 –––200
250 –––250
300 –––300
400 –––400
500 –––500
750 –––750
1,000 –––1K0
1,500 –––1K5
2,000 –––2K0
2,500 –––2K5
3,000 –––3K0
3,500 –––3K5
4,000 –––4K0
4,500 –––4K5
5,000 –––5K0
6,000 –––6K0
10,000 –––10K
15,000 –––15K
20,000 –––20K
25,000 –––25K
50,000 –––50K
75,000 –––75K
100,000 –––100K
=Standardvalues
=Non-standardvaluessubjecttominimum
handling charge per item
Shaded values involve very fine resistance wire
and should not be used in critical applications
without burn-in and/or thermal cycling.
Ohmic value
805F––– 5
810F––– 10
825F––– 25
850F––– 50
Wattage
Part No.
Prefix
Suffix
Ohmic value
805F––– 5
810F––– 10
825F––– 25
850F––– 50
Wattage
Part No.
Prefix
Suffix
Ohmic value
805F––– 5
810F––– 10
825F––– 25
850F––– 50
Wattage
Part No.
Prefix
Suffix
805NF5R0E
Series
805 = 5 Watt
810 = 10 watt
825 = 25 watt
850 = 50 watt
Ohms
R005= 0.005Ω
R10=0.1Ω
1R0=1.0Ω
250 = 250Ω
1K0= 1,000Ω
1K5= 1,500Ω
25K = 25,000Ω
RoHS
Compliant
Tolerance
F = 1%
J = 5%
Non-Inductive Winding
Optional (blank = std. winding)
As of September 2006,
the 89 Series is no longer
offered as Mil. Spec.
Dimensions have changed
as of August 2015
DIMENSIONS
(in./mm)
89 Series
Metal-Mite® Aluminum Housed
Axial Terminal Wirewound, 1% Tolerance
ORDERING INFORMATION
F
B
E
AG
J
L
D
HK
C
810, 825, 850805
Ø 2.0
±.25
2.1
±.1
Ø 1.27
±.13
A
2.16 min.
}
G
16AWG
min.
F
D
C
H
B
K
E
L
J
A B C D E F G H J K L
max. max. max. max. max. ±.3mm ±.3mm max. max. max. ±.25mm
805 0.65" / 16.5 1.18" / 30.0 0.35" / 8.8 0.33" / 8.5 0.63" / 15.9 0.44" / 11.3 0.49" / 12.4 0.18" / 4.5 0.09" / 2.4 0.07" / 1.8 0.09" / 2.4
810 0.83" / 21.0 1.44" / 36.5 0.43" / 11.0 0.44" / 11.2 0.78" / 19.9 0.56" / 14.3 0.63" / 15.9 0.22" / 5.5 0.11" / 2.8 0.07" / 1.8 0.09" / 2.4
825 1.10" / 28.0 2.01" / 51.0 0.58" / 14.8 0.56" / 14.2 1.07" / 27.3 0.72" / 18.3 0.78" / 19.8 0.30" / 7.7 0.20" / 5.2 0.10" / 2.6 0.13" / 3.2
850 1.10" / 28.0 2.85" / 72.5 0.58" / 14.8 0.56" / 14.2 1.93" / 49.1 1.56" / 39.7 0.84" / 21.4 0.33" / 8.4 0.20" / 5.2 0.10" / 2.6 0.13" / 3.2
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128
BA Series
Aluminum Cased Resistor
Overload 5 times rated wattage for 10 sec.
Power Rating Free air; greater with heatsink
Dielectric Withstanding Voltage 2.5KV, 1 min., 50/60 Hz
Insulation Resistance ≥100MΩ
Working Voltage ≥800V
Max. Surface Temp. 385°C
Wire UL listed 3199
FEATURES
•Threeextrusionforms
available
•Heatsinkable
•Ruggeddesign
•Upto1000watts
•Thermalcut-offavailable
•Scalable,customlengths
available
•Customleadsavailable
APPLICATIONS
•DynamicBraking
•MotorStarting
•PowerControl
CHARACTERISTICS
SERIES SPECIFICATIONS
Series Wattage* Resistance range Tolerance Length
BA1160 500 0.5Ω - 18KΩ ±10% 160mm
BA2320 700 10Ω - 10KΩ ±10% 320mm
BA3266 1000 10Ω - 10KΩ ±10% 266mm
* Free air rating
(continued)
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DIMENSIONS
BA Series
Aluminum Cased Resistor
ORDERING INFORMATION
10"
254mm
1.18"
30mm
L
ø0.24" / 6.2mm
4.92"
95mm
2.80"
71mm
3.15 ~ 3.31"
80 ~ 84mm 4.33"
110mm
Thermostat
(optional)
3.94"
100.0mm
L12"
304.8mm 1.18"
30.0mm
5.49"
139.5mm
5.49"
139.5mm
3.43"
87.1mm
17.72"
450.1mm
ø 0.23" / 5.8mm
Thermostat (optional)
Thermostat
(optional)
5.00"
127.0mm
2.95"
74.9mm
L
Wire, 12ga., 600v
12"
304.8mm
12"
304.8mm
2.13"
54.1mm
BAC1160100RKE
Series
B = block
aluminum
Length
(mm)
Termination
A = wire leads
B = solid terminals
Tolerance
K = ±10%
Resistance
RoHS Compliant
Thermal switch
(optional)
Form
1 = extrusion
BA1 BA2
BA3
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130
HS/HSN Series
Aluminum Housed Axial Terminal
Wirewound, Industrial/Commercial Grade
CHARACTERISTICS
Housing Aluminum with hard anodic coating
Internal Coating Silicone
Core Ceramic
Terminals Solder-coated axial
Derating Linearly from 100% @ +25°C to 0% @ +275°C.
Tolerance ±1% and ±5% (other tolerances available)
Power rating Rating is based on chassis mounting area and
temperature stability. Proper heat sink: 12” x 12” x
0.125 Aluminum panel
Overload 5 times rated wattage for 5 seconds
Temperature coefficient Under 1Ω: ±90 ppm/°C; 1 to 9.99Ω: ±50 ppm/°C;
10Ω and over: ±30 ppm/°C
Dielectric withstanding voltage 4500VAC
Power Rating Resistance Range Max. Working
Series (Watts) (Ohms) Voltage
HS100 100 0.05 - 29.4K 1900
HSN100 100 1.0 - 14.7K 1350
HS250 250 0.10 - 35.7K 2300
HSN250 250 1.0 - 17.4K 1625
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 15050 275
80
40
25 100 200 25017575 125 225
Unmounted
Mounted to
aluminum chassis
Derating Curve
TheHS/HSNSeriesoffersgreaterpowercapacity
(100 and 250 watts) in the same design format as
Ohmite’s 89 Series.
HS/HSNSeriesmaintainsthesameconstruction,
materials,andmanufacturingtechniquesasthe89
Series. As a made-to-order product, it is recom-
mended for higher volume applications.
FEATURES
•Standardwinding(ModelHS)
•Non-inductivewinding(ModelHSN)
•Moldedconstructionfortotalenvironmentalprotec-
tion
•Completeweldedconstruction
•Mountsonchassistoutilizeheat-sinkeffect
•Highstabilityatconventionalpowerratings
•Flatmarkingsurfaceforeasyidentification
•RoHScompliant;add“E”suffixtopartnumberto
specify.
SERIES SPECIFICATIONS
(continued)
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A
C
D
N
B FE
I
H
G
M
K
J
L
A
C
D
N
B FE
I
H
G
K
J
L
M
nickel-plated brass nut,
stainless steel stud
25 & 50 watt
100 & 250 watt
HS100 / HSN100 HS250 / HSN250
100 watt 250 watt
Dim. A 2.75 ± .010 (69.85 ± .254) 3.875 ± .010 (98.425 ± .254)
Dim. B 2.25 ± .010 (57.15 ± .254) 2.5 ± .010 (63.50 ± .254)
Dim. C 3.50 ± .031 (88.90 ± .787) 4.5 ± .031 (114.30 ± .787)
Dim. D 5.478 ± .093 (139.14 ± 2.36) 6.73 ± .093 (170.94 ± 2.36)
Dim. E 1.812 ± .031 (46.02 ± .787) 2.125 ± .031 (53.98 ± .787)
Dim. F 2.812 ± .031 (71.42 ± .787) 3.0 ± .031 (76.20 ± .787)
Dim. G 1.75 ± .031 (44.45 ± .787) 2.188 ± .031 (55.58 ± .787)
Dim. H 1.88 ± .031 (4.78 ± .787) 0.250 ± .031 (6.35 ± .787)
Dim. I 0.770 ± .015 (19.56 ± .381) 0.955 ± .015 (24.26 ± .381)
Dim. J 0.375 ± .031 (9.52 ± .787) 0.312 ± .031 (7.92 ± .787)
Dim. K 0.188 ± .010 (4.78 ± .254) 0.188 ± .010 (4.78 ± .254)
Dim. L 0.219 ± .031 (5.56 ± .787) 0.25 ± .031 (6.35 ± .787)
Dim. M 12 - 24 UNC - 2A THD 1/4 - 20 UNC - 2A THD
Dim. N 0.989 ± .031 (25.12 ± .787) 1.25 ± .031 (31.75 ± .787)
HSN100JR05E
Series Ohms
R05=0.05Ω
1R0=1.0Ω
10R =10Ω
100 = 100Ω
10K = 10,000Ω
14K7= 14,700Ω
RoHS
Compliant
Tolerance
F = 1%
J = 5%
K=10%
Non-Inductive Winding
Optional (blank = std. winding)
Wattage
100
250
DIMENSIONS
in. (mm)
HS/HSN Series
Aluminum Housed Axial Terminal
Wirewound, Industrial/Commercial Grade
ORDERING INFORMATION
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132
WFH Series
Aluminum Housed Wirewound Power
Power rating 90W-330W
Resistance
tolerance
±5%, ±10%
Temperature
Coefficients
Normal: 50ppm - 150ppm
Low ohmic values: 400ppm
Dielectric
strength
2500 VAC peak
Working voltage 1200 VAC
Test voltage 6000 VAC
Lead wire (wire terminal version only): XLPE, 600V, 125C,
18 AWG stranded
Insulation Silicone Rubber & Mica. The Silicone is
UL-recognised (UL 94 HB) to a working tem-
perature of 220°C. Temperatures of up to
300°C can be endured for shorter periods.
This may however cause an expansion of the
silicone rubber with a possibility of reducing
the dielectric strength.
Min. Storage &
Operating Temp.
-40˚C
Power Rating* Resistance Range
Type (watts) (Ω)
WFH90 90 0.22Ω – 6.8K
WFH160 160 0.47Ω-18K
WFH230 230 0.82Ω-27K
WFH330 330 1Ω - 39K
*at 40°C base plate temperature
W/Resistor
Heat Sink Te mperature, °C
40°60°80°100°120°140°
100
150
200
300
50
250
350
0
WFH330
WFH160
WFH230
WFH90
Power Dissipation
Ohmite’s new flat core winding technology allows for wire-
wound heatsinkable resistors affording a very low profile, and
superior thermal transfer characteristics when compared to
conventional aluminum housed wirewound resistors.
Close mounting of heat sensitive components is possible
due to only a slight rise of the temperature on the aluminum
profile.
Noheatsinkcompoundisrequiredbecauseoflargemount-
ing surface.
This graph shows the maxi-
mum wattage rating for each
possible resistor of standard
size corresponding to the
heat sink temperature. It is
assumed that all resistors
are equally loaded.
resistor
surface to
heat sink
RTH4
R
TH1
wire to
aluminum
housing
aluminum
housing
to air
R
TH2
R
TH3
aluminum
housing to
heat sink
Thermal Resistances
Thermal Resistance (°C/W) between different
measuring points
WFH90 WFH160 WFH230 WFH330
RTH1 2 1 0.75 0.5
RTH2 6.8 3.9 2.75 2
RTH3 0.1 0.05 0.03 0.02
RTH4 0.3 0.17 0.1 0.085
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must be monitored
and kept within specified limits to establish the power rating. Best
techniqueistoattachathermocoupletothesideofthebaseplateof
the resistor. Temperature of plastic housing or heat sink cannot be
used to establish rating of the resistor.
FEATURES
•Solderlug,wire,and“Fast-on”ampter-
minations
•Multipleresistorsinoneprofilepossible
•Customwirelengthsavailable
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 133
Series Terminal Type
L=lug terminals
A= amp terminals
W= 30cm insulated wire cable 18AWG
Tolerance
J = 5%
K = 10%
Wattage
at 40°C
base plate
temp.
Ohms
R47= 0.47Ω
RoHS
Compliant
Standard part numbers
WFH90L4R7KE
WFH90L10RKE
WFH90L25RJE
WFH90L50RJE
WFH90L100JE
WFH90L470JE
WFH90L750JE
WFH90L1K0JE
WFH90L2K7JE
WFH90L5K0JE
WFH160LR47KE
WFH160L1R0KE
WFH160L2R0KE
WFH160L10RKE
WFH160L27RJE
WFH160L50RJE
WFH160L75RJE
WFH160L100JE
WFH160L150JE
WFH160L250JE
WFH160L1K0JE
WFH160L5K0JE
WFH160L10KJE
WFH230L1R0KE
WFH230L2R0KE
WFH230L5R0KE
WFH230L10RKE
WFH230L27RJE
WFH230L50RJE
WFH230L75RJE
WFH230L100JE
WFH230L150JE
WFH230L250JE
WFH230L1K0JE
WFH230L1K5JE
WFH230L2K5JE
WFH330L1R0KE
WFH330L2R0KE
WFH330L10RKE
WFH330L27RJE
WFH330L50RJE
WFH330L75RJE
WFH330L100JE
WFH330L150JE
WFH330L250JE
WFH330L1K0JE
WFH330L5K0JE
WFH330L10KJE
The following equations are
applied in the dimensioning of
the resistors at stationary load.
If more information is required
please consult Ohmite. It is as-
sumed that the air around the
resistors is stationary (worst
case). See ohmite.com for more
examples.
DIMENSIONS
(mm)
ORDERING INFORMATION
DESIGN INFORMATION
4.8
6
0.6
ø2.2
300
10
Wire
terminal
Lug
terminal
A
B
6.3
51
41
15
13.6
12.6
8
0.8
ø4.5
L
Amp
terminal
WFH Series
Aluminum Housed Wirewound Power
1. WFH is mounted on a heat sink:
A. The thermal resistance RTH of the heat sink is known,
T = WMAX x (RTH4 + RTH)
Check that:
T
MAX = WMAX x (RTH + RTH3 + RTH1) + TAMB <220°C
B. The Temperature of the Heat Sink is known,
T = WMAX x RTH4 + TH
Check that:
T
MAX = WMAX x (RTH1 + RTH3) + TH <220°C
2. WFH is mounted without a heat sink:
Check that:
T
MAX = WMAX x (RTH1 + RTH2 ) + TAMB <220°C
Where:
WMAX = Maximum reguired load in resistor
TMAX = Maximum hot spot temperature reguested in resistor (TMAX <220°C)
The lower TMAX the higher reliability and lifetime.
TAMB = Ambient temperature
RTH = Thermal resistance. Refer to table Thermal resistances
TH = Heat sink temperature (chassis).
T = Temperature on top of the Aluminum profile.
Type Watts A B L
WFH90 90 70 39.7 53
WFH160 160 140 80 123
WFH230 230 210 2x 80 193
WFH330 330 280 2x 100 263
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134
CHARACTERISTICS
Wattage Based on a 275°C “U” characteristic derating curve
Temperature
coefficient
≥18 ohm: 0 ±90ppm/°C
8 < 18 ohm: 0 ±50ppm/°C
<8 ohm: 0 ±180ppm/°C
(TC for some watt/ohm combinations may be lower)
Dielectric
strength
Terminal to case, depends on terminal style (1500V
min.)
Creepage term. style 277: 1.2”
term. style 278: 0.4”
term. style 276: 0.7”
term. styles 211/252/279: 0.15”
Termination
Wires
• Stranded, available in any insulation rated 125°C
or higher (may require term. style 297).
• 12" standard length for term. 297 & 298 (custom
lengths available)
• Can be potted or pre-soldered to terminal styles
211 or 252
• Quick connect (fully or partially insulated), ring or
spade terminations available
Dielectric
Sleeves
• Steatite construction
• Style 276 meets UL/NEMA 2500V RMS for one
minute requirement
• Available as terminal styles 276, 277, 278, 297
Metalohm Series
Cold Rolled Steel Encased Wirewound
Heatsinkable Radial Terminal
Style Watts w/o heat sink Watts w/ heat sink* Ohmic range**
20/45M 20 45 0.05-6K
40/70M 40 70 1.0-25K
HV40-70M 40 70 1.0-25K
50/100M 50 100 1.5-47.5K
60/115M 60 115 2.5-81K
85/150M 85 150 4.5-100K
*Based on a 12”x12”x0.125” aluminum heat sink, using a thermal compound, in a 25°C ambient
**Standard winding ranges only listed, other values available; contact Ohmite.
Dielectric Strength/Terminal Availability
Terminal Type 211 252, 279 276 278 277 297 298
Style Dielectric Strength
20/45M 1500 N/A N/A N/A N/A 2500V 2500V
40/70M 1500 1500 2500 2500 N/A 2500V 2500V
HV40/70M N/A N/A N/A N/A 4250 N/A N/A
50/100M 1500 1500 2500 2500 N/A 2500V 2500V
60/115M 1500 1500 2500 2500 N/A 2500V 2500V
85/150M 1500 1500 2500 2500 N/A 2500V 2500V
OPTIONS
•Noninductiveversions(Aryton-Perrywindings)
•Terminalsleevestoincreasedielectricstrength
andmaximizecreepagedistance
•Varietyofterminalchoices
•Pottedorsolderedwireterminalsincluding
quickconnect,ring,spadeterminals
•Tappedmodels
FEATURES
•Flameproofandinorganic
•Higherpowerratingdueto
heat sink capacity
•Allweldedconstruction
•Nonhygroscopic
•Highsurgeconstruction
SERIES SPECIFICATIONS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 135
Style A B C D
20/45M 1 17/16 1
7/8 3/4
40/70M 29/16 3 37/16 3/4
HV40-70M 29/16 3 37/16 7/8
50/100M 311/16 4
1/8 4
9/16 3/4
60/115M 59/16 6 67/16 3/4
85/150M 71/2 8 81/2 3/4
0.5"
A
B
C
ø0.195"
D
0.75"
term. style 276 (sq. collar, G3923)
278 (oval collar, G3860)
1.5" max.
0.250"
ø0.068"
±0.005
23/16" max.
term. style 277
1.5" max.
term. style 279
0.437" dia.
ø0.089"
1" max.
term. style 211
term. style 252
5/16"
1.25" max.
ø0.171"
term. style 297
1.25" max.
term. style 298
wire wire

Style Ohms
00R05 = 0.05
00R50 = 0.50
1R000 = 1.00
1K000 = 1,000
10K50 = 10,500
Terminal Type
A = 211
B = 252
C = 279
D = 276
Non-inductive
(optional)
Tolerance
K=10%
J= 5%
RoHS Compliant
E = 277
F = 278
G = 297
H = 298
DIMENSIONS
(in.)
ORDERING INFORMATION
Not all terminal types available for all Metalohm sizes
Metalohm Series
Cold Rolled Steel Encased Wirewound
Heatsinkable Radial Terminal
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136
IS Series
Ultra Low Profile Power Resistors
FEATURES
•Heatsinkable
•Lowprofile
•Highpower
•Pulsehandlingcapability
•Non-flammable
•Lowinductances
•Availablewithfast-onterminalsorwireleads
CHARACTERISTICS
TCR <250ppm (surface temp less than 150°C)
Maximum element
temperature
365°C
Working voltage Not to exceed 300V
Over-voltage rating 5X rated power for up to for up to 1 second
Resistive element Thick Film
Derating element surface temp. at 100% to 0% power
at 200°C surface temp.
Power rating dependent on mounting and heatsink ther-
mal capacity
Hot spot surface
temperature
200°C max.
Pulsed load at full
pulse power rating
1,000 cycles
Max. 1%ΔR; (see Fig 1)
Mounted on a 0.06°C/W heatsink with
forced air cooling, air temperature 25°C (ref
AH32430 12" long)
Solder Silver solder is recommended for IS Series
resistors. Leaching of the silver in the termi-
nation will occur if non-silver solder is used.
60/40 tin-lead solders are not recommended
for use with the IS Series product.
Screw torque 3.5 Nm
SERIES SPECIFICATIONS
Power Resistance
Rating Range
Type (watts) (Ω) Tolerance
IS175 175 5Ω to 10KΩ 10%, 20%
IS200 200 5Ω to 10KΩ 10%, 20%
IS250 250 5Ω to 10KΩ 10%, 20%
IS270 270 5Ω to 10KΩ 10%, 20%
Derating
Construction
% Rated Power
Resistor Surface Temp., oC
2500 50 100 150 200
40
0
60
80
120
20
100
Termination
Dielectric Glass Overcoat
Resistive Glaze
Stainless Steel
USES
•Brakingresistors
•In-rushcurrentlimiter
•Bleederresistor
•Powerswitching
THIS PRODUCT IS
DESIGNED FOR USE WITH
PROPER HEATSINKING.
Maximum base plate temperature of
the resistor must be monitored and
kept within specified limits to estab-
lishthepowerrating.Besttechnique
is to attach a thermocouple to the
side of the base plate of the resistor.
•Ruggedconstruction
•Ultralowprofilethick-
film on steel
•175Wto270Wsizes
•Singlefixingheatsink
mountable •Softcharging
(continued)
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ORDERING INFORMATION
TERMINATION OPTIONS
IS Series
Ultra Low Profile Power Resistors
IS200C47RKE
Tolerance
K = 10%
M = 20%
Resistance
3 digits
47R = 47Ω
Termination
A = Tinned pad
B = Soldered lead
C = Fast on terminal
Wattage
175
200
250
270
RoHS
Compliant
Series
Insulated
Steel
DIMENSIONS
(in/mm)
Thickness: 0.040 in. / 1.02mm ±.1
Type Wattage L ±0.2mm W ±0.2mm ØD nom. Wt. nom (oz/g)
IS175 175 1.94/49.30 1.41/35.90 0.13/3.20 0.44/12.60
IS200 200 2.40/61.00 1.60/40.60 0.21/5.30 0.60/17.10
IS250 250 4.00/101.60 2.76/70.00 0.21/5.30 1.78/50.80
IS270 270 4.80/122.00 2.76/70.00 0.21/5.30 2.12/60.70
W
L
D
10" 14AWG
0.250" 0.032"
9mm
9mm
Solder pad only
SnAg (96S)
Flying leads Push-on
connectors
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138
CHARACTERISTICS
TAP600 Series
600 Watt Heat Sinkable Planar
Resistance Values 0.25Ω to 100KΩ
Resistance Tolerance ±10% Std., 5% available on request.
Temperature Coefficient ±150ppm/°C (others upon request)
Maximum Working Voltage 5,000V DC, higher voltage on request, not
exceeding max. power
Power Rating 600W at 70°C heat sink temperature or
85°C bottom case temperature. This value
is only valid by using a thermal conduction
to the heat sink Rth -cs<0.025°C/W.
The value can be reached by using thermal
transfer compound with a heat conductivity
of 1w/mk. The flatness of the cooling plate
must be better than 0.05mm overall. The
roughness of the surface should not exceed
6.4µm.
Dielectric Strength Voltage 6k Vrms, 50Hz, 1min standard; up to 12k
Vrms available
Single Shot Voltage Up to 12KV Normwave (1.5/50 µsec)
Insulation Resistance 10GΩ min. at 500V
Creeping Distance 42mm min.
Air Distance 14mm min.
Inductance ≤80nH
Capacitance/Mass ≤110pF
Capacitance/Parallel ≤40pF
Operation Temperature -55°C to +150°C
Max. Torque for Contacts 2 Nm
Max. Torque for Mounting 1.8 Nm
Derating (thermal resist.) 8.73W/°C (0.115°C/W)
Test Method
Typical
Results - ∆R
Short Time
Overload
1000 W/10 Sec. @
70°C
0.4%
Humidity Steady
State
56 Days/40°C/ 95°C 0.25%
Temp. Cycling -55/+125/5 Cycles 0.20%
Shock 40g/4,000 Times 0.25%
Vibrations 2 - 500Hz/10g 0.25%
Load Life 1,000
Cycles
Pn 30 min. ON/30
min. OFF
0.40%
Terminal Strength
of Contacts
200N 0.05%
Derating
Percent rated power
Bottom of base plate Temperature, °C
0255075 100 125 150 175
40
0
60
80
120
20
100
Rated power, watts
240
0
360
480
720
120
600
Ohmite’s TAP600 delivers 600
watts of reliable power to a
variety of power conditioning,
power transmission, and power
control applications. These resis-
torscanbedesignedforliquid
or air cooled heat sink systems.
Applications include variable
speed drives, power supplies,
robotics, motor control, and other
control devices.
FEATURES
•DielectricStrengthupto12KV
•SpecialDesignforLowInductanceand
CapacitanceValues
•Contactsallowforeasyloadconnec-
tion with M5 screws (not included)
availablewithM4asspecialrequest.
Thread depth 7mm
•Encapsulatedwithaspecialresinfilled
epoxy casing with a large creepage
distance to mass, large air distance
between terminals, and a high insula-
tionresistance(CTI600).
•Materialsmeettherequirementsof
UL94-V0
(continued)
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DIMENSIONS
(iin./mm)
ORDERING INFORMATION
*Also C to C
dimension for
mounting holes
LL
ø0.159–0.169"
(4.05–4.3mm)
0.689–0.728"
(17.5–18.5mm)
2.527–2.591"
(64.2–65.8mm)
1.331–1.346"
(33.8–34.2mm)
*2.236–2.252"
(56.8–57.2mm)
1.409–1.425"
(35.8–36.2mm)
2.331–2.394"
(59.2–60.8mm)
øM5
occ. Din
0.177–0.216"
(4.5–5.5mm)
1.240–1.279"
(31.5–32.5mm)
*
*Dimensions are taken while part is
mounted to a proper heatsink
1.161–1.201"
(29.5–30.5mm)
*
0.571–610"
(14.5–15.5mm)
*
0.177–0.216"
(4.5–5.5mm)
0.295–0.335"
(7.5–8.5mm)
Tolerance
J = 5%
K = 10%, Std.
L = 20%
Style Resistance
1 Ohm = 1R0
10 Ohm = 10R
1000 Ohm = 1K0
TAP600K5R0E
RoHS compliant
Non-compliant version
unavailable
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
TheOhmiteCP4(http://www.ohmite.com/cat/sink_cp4.
pdf) is an example of properly designed heat sink.
Standard Values
0.10 1.0 15 500
10% tol.
TAP600 Series
600 Watt Heat Sinkable Planar
5% tol.
TAP600J1R0E
TAP600J10RE
TAP600J50RE
TAP600J100E
TAP600J500E
TAP600J1K0E
TAP600K4R0E
TAP600K40RE
TAP600K20RE
TAP600K200E
TAP600K22RE
TAP600K2R0E
TAP600K3R0E
TAP600K50RE
TAP600K5R0E
TAP600K7K5E
TAP600K7R5E
TAP600K75RE
TAP600K750E
TAP600K30RE
TAP600K500E
TAP600KR25E
TAP600KR33E
TAP600KR50E
TAP600K100E
TAP600K10KE
TAP600K10RE
TAP600K1K0E
TAP600K1R0E
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140
TAP800 Series
800 Watt Heat Sinkable Planar
Resistance Values 1Ω to 10KΩ
Resistance Tolerance ±5% to ±10%
Temperature Coefficient ±150ppm/°C (others upon request)
Maximum Working
Voltage
5,000V DC, higher voltage on request, not exceeding
max. power
Short Time Overload 1,200W at 70°C for 10sec., ∆R=0.4% max.
Power Rating 800W at 85°C Bottom case temperature.
Peak Current up to 1500 amp. depending on pulse length and fre-
quency Please ask for details
Electric Strength Voltage 6kVrms, 50Hz,upto 12kVrms on special request
Single Shot Voltage up to 12kV Normwave (1.5/50 µsec)
Partial Discharge 4KVrms, <10pC, up to 7kV on special request
Insulation Resistance 10GΩ min. at 500V
Creeping Distance 42mm min.
Air Distance 14mm min.
Inductance 80nH
Capacity/Mass 110pF
Capacity/Parallel 40pF
Operation Temperature -55°C to +150°C
Max. Torque for
Contacts
2 Nm
Max. Torque for
Mounting
1.8 Nm M4 screws (not included)
Derating 9.09W/°K (0.11°K/W)
Power Rating 800W at 85°C bottom case temp. This value is only
valid by using a thermal conduction to the heatsink
Rth-cs<0.025°K/W. This value can be reached by
using thermal transfer compound with a heat conduc-
tivity of 1W/mK. The flatness of the cooling plate must
be better than 0.05mm overall. The roughness of the
surface should not exceed 6.4µm.
Test
Method
Typical
Results
∆R
Short time
overload
1,000 W/10sec 0.4%
Humidity
Steady State
56 days/40°C/95% 0.25%
Temp. Cycling -55/+125/5 cycles 0.20%
Shock 40g/4,000 times 0.25%
Vibration 2-500Hz/10g 0.25%
Load Life Pn 30 min. on/30 min
off, 1,000cyl
0.40%
Terminal
Strength
200N 0.05%
Derating
Rated Power, %
Bottom of base plate Temperature, °C
0255075 100 125 150 175
40
0
60
80
120
20
100
Rated power, watts
320
0
480
640
960
160
800
Ohmite’s TAP800 Series dissipates 800 watts of
powerwhenusedwithaliquidoraircooledheat
sinksystem.TheOhmiteCP4(http://www.ohmite.
com/cat/sink_cp4.pdf)isanexampleofproperly
designed heat sink. The TAP800 rounds out 600
watt (TAP600) and 1000 watt (TAP1000) prod-
uct offerings. Applications include variable speed
drives, power supplies, robotics, motor control, con-
trol devices, and other power designs.
FEATURES
•Electricsupportishighaluminacontentceramic
metallizedonthebottomforidealheattransferand
optimum discharge.
•Encapsulatedwithaspecialresinfilledepoxycas-
ing with a large creepage distance to mass, large
air distance between terminals, and a high insula-
tionresistance(CTI600).
•Resistiveelementisspeciallydesignedforlow
inductance and capacitance. The element provides
stable performance in addition to high wattage and
pulse loading capability.
•ContactsallowforeasyloadconnectingwithM4or
M5 screws (not included).
•MaterialsmeettherequirementsofUL94-V0
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 141
TAP800K5R0E
Tolerance
J = 5%
K = 10%, Std.
L = 20%
Style Resistance
1 Ohm = 1R0
10 Ohm = 10R
1000 Ohm = 1K0
Wattage
800 watts
RoHS compliant
Non-compliant version
unavailable
*C to C for
mounting holes
2.236-2.252"
(56.8-57.2mm)
LL
ø0.159–0.169"
(4.05–4.3mm)
0.689–0.728"
(17.5–18.5mm)
2.527–2.591"
(64.2–65.8mm)
1.331–1.346"
(33.8–34.2mm)
*2.236-2.259"
(56.8-57.4mm)
1.409–1.425"
(35.8–36.2mm)
2.331-2.394"
(59.2-60.8mm)
øM5
occ. Din
0.177–0.216"
(4.5–5.5mm)
0.177–0.216"
(4.5–5.5mm)
0.256-0.295"
(6.5-7.5mm)
1.240–1.279"
(31.5–32.5mm)
*
*Dimensions are taken while part is
mounted to a proper heatsink
1.161–1.201"
(29.5–30.5mm)
*
0.571–610"
(14.5–15.5mm)
*
Standard Values
TAP800 Series
800 Watt Heat Sinkable Planar
ORDERING INFORMATION
DIMENSIONS
(in./mm)
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142
TAP1000 & 2000
1000 & 2000 Watt Heat Sinkable Planar
Resistor Element Thick Film on Alumina
Substrate
Power Rating 1000W or 2000W at
85°C mounting plate
Resistance Values 0.5Ω to 1000Ω
Resistance Tolerance +10% std.
Max Operating Voltage 2000VDC
Temperature Coefficient ± 250 PPM/°C
Dielectric Strength 6KV standard
Operating Temperature
Range
-55°C to 85°C
Terminal Screws #10-32
Max Contacts Torque 10 in-lb
Mounting Screws #8-32
Max Mounting Torque 15 in-lb
Creepage Distance 50mm ± 1mm (min)
100
Percent Rated Watts
Bottom of base plate Temperature, °C
60
20
0150
80
40
25 100 12505085
Rating
Test Continuous Pulse
Rated Power, max. current and heat sink plate
temperature limited
(TA1K0) 1000W
(TA2K0) 2000W
Operating Voltage √P*R N/A
Max. Applied Voltage, ohms law limited 223V 2000VDC
Max. Current 10A 53.33A
Critical Resistance; below this resistance max
power has to be de-rated due to exceeding max
current
(TA1K0) 10Ω
(TA2K0) 20Ω
Test Method Maximum ∆R
Short Time
Overload
1.14 x √P*R / 10 sec @ 70°C Max % ∆Rsto =
±(2% + 0.05Ω)
Moisture
Resistance
(TA1K0) 1000 hrs @ 40°C, 90-95% RH
(TA2K0) 1750 hrs @ 40°C, 90-95% RH
≤1%
≤1%
Thermal Shock MIL-STD-202, Method 107 MIL-STD-202,
Method 107
Vibration, elec. MIL-STD-202, Method 201 ±2% Resistance
Vibration, mech. MIL-STD-202, Method 201 No Loose
Terminal Screws
Load Life (TA1K0) 1000 Hrs 90 min ON / 30 min OFF
(TA2K0) 1750 Hrs 90 min ON / 30 min OFF
≤1%
≤1%
Pulse Tolerance 52µF @ 2KV / 60 sec intervals, 104J,
20,000 Pulses
≤1%
Dielectric
Strength
6KVDC for 1 minute ≤1%
The TAP series delivers
1000W or 2000W of contin-
uous power when properly
mountedtoaliquidcooled
heatsink(basedon85°C
mounting plate tempera-
ture)
Applications include
power conditioning, power
distribution, power conver-
sion, and power control.
FEATURES
•HighEnergyRating
•LowInductance
•ResistorElementElectricallyIsolated
•HighDielectricStrength
•SmallFootprint
APPLICATIONS
•Powersemiconductorbalancing
•Motorcontrol
•InrushCurrentLimiting
CHARACTERISTICS
Derating
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 143
Test Method Maximum ∆R
Short Time
Overload
1.14 x √P*R / 10 sec @ 70°C Max % ∆Rsto =
±(2% + 0.05Ω)
Moisture
Resistance
(TA1K0) 1000 hrs @ 40°C, 90-95% RH
(TA2K0) 1750 hrs @ 40°C, 90-95% RH
≤1%
≤1%
Thermal Shock MIL-STD-202, Method 107 MIL-STD-202,
Method 107
Vibration, elec. MIL-STD-202, Method 201 ±2% Resistance
Vibration, mech. MIL-STD-202, Method 201 No Loose
Terminal Screws
Load Life (TA1K0) 1000 Hrs 90 min ON / 30 min OFF
(TA2K0) 1750 Hrs 90 min ON / 30 min OFF
≤1%
≤1%
Pulse Tolerance 52µF @ 2KV / 60 sec intervals, 104J,
20,000 Pulses
≤1%
Dielectric
Strength
6KVDC for 1 minute ≤1%
TA 1K0PH2R50KE
Style Package
Type
Resistance
2.5Ω = 2R50
50Ω = 50R0
Tolerance
K = 10% (standard)
L = 20%
Wattage
RoHS Compliant
0.798"
(20.26mm)
3.000"
(76.20mm)
ø10-32
1.308"
(33.21mm)
0.193"
(4.89mm)
1.622"
(41.20mm)
0.689"
(17.50mm)
ø0.172"
(4.37mm)
0.450"
(11.43mm)
0.300"
(7.62mm)
0.188"
(4.76mm)
1.308"
(33.21mm)
(same dimensions)
1000 Watt
Ohms 10% Tolerance
0.5 TA1K0PHR500KE
1 TA1K0PH1R00KE
2.5 TA1K0PH2R50KE
5 TA1K0PH5R00KE
7.5 TA1K0PH7R50KE
10 TA1K0PH10R0KE
15 TA1K0PH15R0KE
25 TA1K0PH25R0KE
50 TA1K0PH50R0KE
100 TA1K0PH100RKE
250 TA1K0PH250RKE
500 TA1K0PH500RKE
750 TA1K0PH750RKE
1000 TA1K0PH1K00KE
2000 Watt
Ohms 10% Tolerance
0.5 TA2K0PHR500KE
1 TA2K0PH1R00KE
2.5 TA2K0PH2R50KE
5 TA2K0PH5R00KE
7.5 TA2K0PH7R50KE
10 TA2K0PH10R0KE
15 TA2K0PH15R0KE
25 TA2K0PH25R0KE
50 TA2K0PH50R0KE
100 TA2K0PH100RKE
250 TA2K0PH250RKE
500 TA2K0PH500RKE
750 TA2K0PH750RKE
1000 TA2K0PH1K00KE
APPLICATION NOTES
Properheatsinkingtechniquesareessentialtoperformanceof
a TAP resistor. Pleased follow these guidelines when designing
TAPsystem:
• Heatssinkplate(baseplateoftheresistor)temperature
must be monitored to establish proper de-rating. Best tech-
niqueistoattachathermocoupletothesideofthebase
plate of the resistor. Temperature of plastic housing or heat
sinkcannotbeusedtoestablishratingoftheresistor.Usage
of laser thermometers should be avoided.
• Toobtainapowerratingof1000Wor2000W,thebottom
casetempmustnotexceed85°C.Thiscanonlybeachieved
ifthethermalconductiontotheheatsinkRth-cs<0.025°K/W.
This value can be reached by using thermal transfer com-
poundwithaheatconductivityof1W/mK.Theflatnessof
the cooling plate must be better than 0.05mm overall. The
roughnessofthesurfaceshouldnotexceed6.4µm.
• Duetoveryhighpowerdensity,onlyliquidcooledheatsinks
are recommended for applications when >300W power rating
is desired.
• Properlydesignedheatsinkshouldhavemorethan2cooling
pipes under the surface of the TAP resistor. The Ohmite CP4
heatsink(http://www.ohmite.com/cat/sink_cp4.pdf)isan
example of properly designed heat sink.
TAP1000 & 2000
1000 & 2000 Watt Heat Sinkable Planar
Standard Part Numbers
ORDERING INFORMATION
DIMENSIONS
(in./mm)
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144
CHARACTERISTICS
TAH Series
20 Watt TO220 Package
Thick Film Power
Resistance Range 0.05Ω to 10KΩ, other values available upon
request
Tolerance <0.1Ω: 5% only
0.1Ω-1MΩ: 5% std.; 1% available
Temperature
Coefficient
Referenced to 25°C, ∆R taken at +105°C;
1 to 10Ω: ±(100ppm+0.002Ω)/°C
10Ω & up: ±50ppm/°C
Max Operating
Voltage
350V
Dielectric Strength 1,800 VAC
Power Rating 20W @ 25°C case temperature; see derating
curve, below
Insulation Resistance 10GΩ min.
Momentary Overload 2x rated power for 5 seconds where applied
voltage ≤1.5 times max. operating voltage.
∆R ±(0.3% + 0.001Ω) max.
Case Material KMC-125 epoxy
Terminal Material Copper
Terminal Plating Lead Free Solder (97% Tin, 3% Silver)
Mounting Requires the use of a snap-on style heat
sink. A thermal compound should be properly
applied.
Solder Process The TAH20 cannot exceed 260°C for more
than 10 seconds during soldering process.
Load Life MIL-R-39009, 2000 Hours
@ Rated Pwr
∆R = ±(1.0%
+ 0.001) Ω
Thermal Shock MIL-R-STD-202, Method
107, Cond. F
∆R = ±(0.3%
+ 0.001) Ω max
High Freq
Vibration
MIL-R-STD-202, Method
204, Cond. D
∆R = ±(0.2%
+ 0.001) Ω max
Terminal Strength MIL-R-STD-202, Method
211, Cond. A (Pull Test)
2.4N
∆R = ±(0.2%
+ 0.001) Ω max
Moisture
Resistance
MIL-R-STD-202, Method
106
∆R = ±(0.5%
+ 0.01) Ω max
Derating
175
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
050 100 15025 75 125
80
40
Rated Power, Watts
20/35
16/28
12/21
8/14
4/ 7
0
TAH/TCH
TCH
TAH
TheTAH20isacompletelyencapsulated
thick film resistor in the TO220 package
outline.Ratedfor20watts@25°Ccase
temperature, these resistors are elec-
trically isolated, and molded in a high
temperature case.
Designedforheatsinkmounting,
the symmetrical package is ready for
use with snap-on style heat sinks (we
recommend use of thermal grease). The
TAH20Serieshasverylowinductance,
and available in a wide range of resis-
tance values in standard 5% tolerance.
1% tolerance available by special order.
FEATURES
•20WattPowerRatingat
25°CCaseTemperature
•HighPulseTolerantDesign
•Quick-snapMoldedPackage
•VeryLowInductanceDesign
•ResistorPackageElectrically
IsolatedfromHeatSink
•LowThermalResistanceto
HeatSink@RTH<6.25°C/W
•TubePackagingAvailable
APPLICATIONS
•FrequencyConversion
•HighFrequencyBalancing
•Snubbers
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 145
DIMENSIONS
(iin./mm)
ORDERING INFORMATION
0.400–0.420"
(10.15–10.67mm)
0.630–0.650"
(16.00–16.52mm)
0.450–0.550"
(11.43–13.97mm)
0.100–0.160"
(2.54–4.06mm)
0.045–0.055"
(1.14–1.40mm)
0.026–0.034"
(0.66–0.86mm)
0.190–0.210"
(4.82–5.34mm)
0.115–0.135"
(2.92–3.44mm)
0.016–0.024"
(0.40–0.60mm)
0.060–0.080"
(1.52–2.04mm)
Standard Part Numbers
TAH20P100RJE
TAH20P10K0JE
TAH20P10R0JE
TAH20P150RJE
TAH20P15R0JE
TAH20P1K00JE
TAH20P1K50JE
TAH20P1R00JE
TAH20P1R50JE
TAH20P200RJE
TAH20P20R0JE
TAH20P220RJE
TAH20P22R0JE
TAH20P240RJE
TAH20P24R0JE
TAH20P2K00JE
TAH20P2K20JE
TAH20P2K40JE
TAH20P2R00JE
TAH20P2R20JE
TAH20P2R40JE
TAH20P330RJE
TAH20P33R0JE
TAH20P390RJE
TAH20P39R0JE
TAH20P3K30JE
TAH20P3K90JE
TAH20P3R30JE
TAH20P3R90JE
TAH20P470RJE
TAH20P47R0JE
TAH20P4K70JE
TAH20P4R70JE
TAH20P510RJE
TAH20P51R0JE
TAH20P5K10JE
TAH20P5R10JE
TAH20P750RJE
TAH20P75R0JE
TAH20P7K50JE
TAH20P7R50JE
TAH20PR050JE
TAH20PR100JE
TAH20PR150JE
TAH20PR200JE
TAH20PR220JE
TAH20PR240JE
TAH20PR330JE
TAH20PR390JE
TAH20PR470JE
TAH20PR510JE
TAH20PR750JE
Ohm Value
Example:
2R40 = 2.4 Ohms
2K40 = 2400 Ohms
Tolerance
F = 1%
J = 5% Standard
Series
TAH20P10R0JE
Package Code
RoHS Compliant
Non-compliant
version unavailable
TAH Series
20 Watt TO220 Package
Thick Film Power
THIS PRODUCT IS DESIGNED FOR USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must be monitored and kept within specified limits to establish the
powerrating.Besttechniqueistoattachathermocoupletothesideofthebaseplateoftheresistor.Temperatureof
plastic housing or heat sink cannot be used to establish rating of the resistor.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
146
CHARACTERISTICS
TBH Series
25 Watt TO220 Package Thick Film Power
Resistor Thick film element above 1Ω, Ni-Cu metal ele-
ment below 1Ω
Case High Temperature Plastic
Terminals Solder coated phospher bronze
Derating 100% @ 25°C to 0% @ 150°C curve refer-
enced to case temperature
Dielectric Strength 1000 VDC
Max. Mounting
Torque
0.9Nm
Operating
Temperature Range
-55°C to +150°C
Temperature
Coefficient
0.03-10Ω @ ±100ppm
11Ω-10KΩ @ ±50ppm
Thermal Resistance 5°C/W
Tolerance 5%
Power 25 Watts. Rating based on 25°C case tem-
perature. The case temperature is to be used
for the purposes of establishing the applied
power limit. The case temperature must be
made with thermocouple contacting the cen-
ter of the component’s mounting tab mounted
on designated heat sink.
Resistance Range 0.03Ω - 10KΩ. Standard values listed at left,
others available upon special request.
Max. Operating
Voltage
350V
Test Condition Result
Load Life (1000hrs @ rated power) max. ∆R ±1%
Moisture
Resistance
(MIL-STD-202, method 106) max. ∆R ±0.5%
Short Time
Overload
(2x rated power, not to exceed
1.5x max. operating voltage)
max. ∆R ±0.3%
Solderability (MIL-STD-202, method 208)
Thermal Shock (MIL-STD-202, method 107,
cond. F)
max. ∆R ±0.3%
Terminal
Strength
(MIL-STD-202, method 211,
cond. A (pull test) 2.4N)
max. ∆R ±0.2%
Vibration (MIL-STD-202, method 204,
cond. D)
max. ∆R ±0.2%
Ohmite’sTBH25TO220style
resistors are designed for a
varietyofusesthatrequire
intermediate heatsinkable
power at an economical price.
Engineered for industrial
applications, these resistors
deliver reliable performance
totraditionalhigh-quality
Ohmite standards.
FEATURES
•25Watts,@25°Ccasetem-
perature
•Non-InductivePerformance
•LowThermalResistance
•Anti-statictubepackaging
available
•Economicallypriced
•Resistanceelementiselec-
trically insulated from metal
heat sink mounting tab
APPLICATIONS
•PowerSupplies
•IndustrialControls
•AutomotiveSteering
•Pre-load/Damping
•Snubber/Bleeder
•CurrentSensing
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 147
DIMENSIONS
(iin./mm)
ORDERING INFORMATION
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
Series Tolerance
J = 5%, standard
Ohm Value
Example:
R030 = 0.030Ω
10R0 = 10Ω
1K50 = 1500Ω
TBH25P2R00JE
RoHS compliant
Non-RoHS version unavailable
0.402" ±0.008
(10.2mm ±0.2)
0.108"
(0.274mm)
ø0.151"
(3.84mm)
0.052"
(1.32mm)
0.032"
(0.81mm) 0.367"
(9.32mm)
0.200"
(5.08mm)
0.050"
(1.27mm)
0.137"
(3.48mm)
0.255"
(6.48mm)
0.630"
(16.00mm)
0.110" ±0.012
(2.8mm ±0.3) 0.015"
(0.38mm)
Molding
0.104" ±0.008
(2.65mm ±0.2)
0.487"
(12.37mm)
Note: These dimensions apply to TBH products manufactured after March 2007
Standard Part Numbers
Part Number
Ohms 5% Tolerance
0.030 TBH25PR030JE
0.036 TBH25PR036JE
0.040 TBH25PR040JE
0.047 TBH25PR047JE
0.050 TBH25PR050JE
0.075 TBH25PR075JE
2 TBH25P2R00JE
7.5 TBH25P7R50JE
10 TBH25P10R0JE
15 TBH25P15R0JE
22 TBH25P22R0JE
30 TBH25P30R0JE
33 TBH25P33R0JE
47 TBH25P47R0JE
51 TBH25P51R0JE
75 TBH25P75R0JE
Part Number
Ohms 5% Tolerance
100 TBH25P100RJE
150 TBH25P150RJE
220 TBH25P220RJE
240 TBH25P240RJE
330 TBH25P330RJE
470 TBH25P470RJE
510 TBH25P510RJE
1000 TBH25P1K00JE
1500 TBH25P1K50JE
2000 TBH25P2K00JE
2700 TBH25P2K70JE
10,000 TBH25P10K0JE
TBH Series
25 Watt TO220 Package Thick Film Power
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
148
CHARACTERISTICS
TCH Series
35 Watt TO220 Package Thick Film Power
Resistance Range 0.1Ω to 10KΩ (higher values on request subject
to derating)
Resistance
Tolerance:
± 5% standard; ± 1% available on request
Temperature
Coefficient
Referenced to 25°C, ∆R taken at +105°C
10Ω and above: ±50 ppm°C
For under 10Ω:
0R6 - 9R9: 100PPM
0R4 - 0R59: 150PPM
0R2 - 0R39: 250PPM
0R1 - 0R19: 500PPM
0R05 - 0R09: 1000PPM
Max. Operating
Voltage
350V
Dielectric Strength 1800 VAC
Insulation
Resistance
10GΩ min.
Momentary
Overload
2x rated power for 5 seconds as long as the
applied voltage ≤1.5 times the continuous
operating voltage, where ∆R ±(0.3% + 0.01Ω)
max
Terminal Material Copper
Terminal Plating Lead Free Solder (97% Tin, 3% Silver)
Maximum Torque 0.9 Nm
Power Rating 35 Watts @ 25°C case temperature; see derat-
ing curve, below
Working
Temperature
Range
-55°C to +175°C
Solder Process The TCH35 cannot exceed 260°C for more
than 10 seconds during soldering process
Test Condition Result ∆R
Load Life MIL-R-39009, 2000 Hours
@ Rated Pwr
±(1.0% +0.01) Ω
Thermal
Shock
MIL-R-STD-202, Method
107, Cond. F
±(0.3% +0.01) Ω max
High Freq
Vibration
MIL-R-STD-202, Method
204, Cond. D
±(0.2% +0.01) Ω max
Terminal
Strength
MIL-R-STD-202, Method
211, Cond. A (Pull Test)
2.4N
±(0.2% +0.01) Ω max
Moisture
Resistance
MIL-R-STD-202, Method
106
± (0.5% +0.01) Ω max
175
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
050 100 15025 75 125
80
40
Rated Power, Watts
20/35
16/28
12/21
8/14
4/ 7
0
TAH/TCH
TCH
TAH
Ohmite’sTCH35TO220package
resistor provides 35W of steady state
power when properly used in today’s
well defined heat sink applications.
These very low induction resistors
are built under proprietary processes
that deliver more power handling
capability than other TO220 package
resistorsofsimilarsize.
Standard terminal forms are provid-
ed for manual or automatic insertion.
A single screw mounting tab con-
nects to the heat sink and should be
accompanied by the use of a thermal
compound.TheTCH35Seriesoffersa
low thermal resistance to the heat sink
of<4.28°C/W.
FEATURES
•35WPowerRating@25°C
•VeryLowInductanceDesign
•SingleScrewMounting
•LowThermalResistanceto
HeatSink@RTH<4.28°C/W
•ResistanceElementis
ElectricallyInsulatedfrom
MetalHeatSinkMountingTab
APPLICATIONS
•SwitchingPowerSupplies
•Snubbers
•HighFrequency
•VoltageRegulation
•LowEnergyPulseLoading
Derating
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 149
DIMENSIONS
(in./mm)
ORDERING INFORMATION
Standard Part Numbers
TCH35P100RJE
TCH35P10K0JE
TCH35P10ROJE
TCH35P150RJE
TCH35P15R0JE
TCH35P1K00JE
TCH35P1K50JE
TCH35P1R00JE
TCH35P1R50JE
TCH35P200RJE
TCH35P20R0JE
TCH35P220RJE
TCH35P22R0JE
TCH35P240RJE
TCH35P24R0JE
TCH35P2K00JE
TCH35P2K20JE
TCH35P2K40JE
TCH35P2R00JE
TCH35P2R20JE
TCH35P2R40JE
TCH35P330RJE
TCH35P33R0JE
TCH35P390RJE
TCH35P39R0JE
TCH35P3K30JE
TCH35P3K90JE
TCH35P3R30JE
TCH35P3R90JE
TCH35P470RJE
TCH35P47R0JE
TCH35P4K70JE
TCH35P4R70JE
TCH35P510RJE
TCH35P51R0JE
TCH35P5K10JE
TCH35P5R10JE
TCH35P5R60JE
TCH35P750RJE
TCH35P75R0JE
TCH35P7K50JE
TCH35P7R50JE
TCH35PR100JE
TCH35PR150JE
TCH35PR200JE
TCH35PR220JE
TCH35PR240JE
TCH35PR330JE
TCH35PR390JE
TCH35PR470JE
TCH35PR510JE
TCH35PR560JE
TCH35PR750JE
TCH35PRO50JE
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
Ohm Value
Example:
2R40 = 2.4 Ohms
2K40 = 2400 Ohms
Tolerance
F = 1%
J = 5% Standard
Series
TCH35P10R0JE
Package Code
RoHS Compliant
Non-compliant
version unavailable
0.390–0.410"
(9.91–10.41mm)
0.112–0.120"
(2.85–3.05mm)
ø0.139–0.148"
(3.55–3.75mm)
0.046–0.054"
(1.17–1.37mm)
0.027–0.034"
(0.70–0.86mm)
0.500–0.579"
(12.70–14.70mm)
0.190–0.210"
(4.83–5.33mm)
0.047–0.055"
(1.20–1.40mm)
0.230–0.250"
(5.85–6.35mm)
0.571–0.591"
(14.50–15.00mm)
0.157" max.
(5.00mm)
0.022–0.028"
(0.55–0.70mm)
0.159–0.190"
(4.06–4.82mm)
0.080–0.089"
(2.05–2.25mm)
TCH Series
35 Watt TO220 Package Thick Film Power
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
150
TEH70 Series
70 Watt TO247 Package
Thick Film Power
FEATURES
•70Wattpowerratingat25°Ccasetemperature
•Non-inductiveperformance
•Lowthermalresistance
•RoHScompliantdesign
•Twoorthreeterminalversionsavailable
•Heatsinkcanbegroundedthroughmiddleterminal(Pstyle)
Test Conditions Of Test Performance
Load life 1000 hrs @ rated power ±1% ∆R
Moisture
resistance
MIL -STD-202, method 106 ±0.5% ∆R
Short time
overload
2x rated power for 5 sec., not to
exceed 1.5x max. working voltage
±0.3% ∆R
Solderability MIL-STD-202, method 208
Thermal
shock
MIL-STD-202, method 170, cond. F ±0.2% ∆R
70
56
42
28
14
0
Wattage
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
0
80
40
75 100 1751255025 150
Derating
Resistor thick film on alumina
Lead solder coated phosphor bronze
Solder 100% Sn
Case high temperature plastic
P Package middle terminal is electrically connected
to header and insulated from left and
right terminals
M Package no middle terminal
Derating linear, 100% at 25°C to 0% at 150°C
Resistance range 2Ω-10KΩ
Max. working voltage 500V or Ohm’s Law limited
Thermal Resistance 1.79°C/W
Temperature
Coefficient
2Ω-10Ω: ±100ppm
10Ω-10KΩ: ±50ppm
Insulation Resistance 400 MΩ
Short time overload 2x rated power for 5 sec., not to exceed
1.5x max. working voltage
Dielectric Strength 2000 VDC
CHARACTERISTICS
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 151
0.63"
(15.90mm)
0.83"
(21.08mm)
0.25"
(6.24mm)
ø0.15"
(ø3.84mm)
0.80"
(20.32mm) 0.08"
(2.03mm)
0.05"
(1.22mm)
Connected to
heatsink for
grounding
0.43"
(10.82mm)
0.20"
(5.08mm
)
0.09"
(2.29mm)
0.21"
(5.41mm)
P style
(standard)
M style
(optional)
0.025"
(0.64mm)

Series Tolerance
J= 5%
Package Code
P = three terminals
M = two terminals
Ohms
R = Decimal
Example:
10R2 = 10.2 ohms
100R = 100 ohms
15K0 = 15,000 ohms
RoHS Compliant
Non-compliant
version unavailble
Standard Part Numbers
P-type M-type
Ohms 3-terminal 2-terminal
2 TEH70P2R00JE TEH70M2R00JE
3 TEH70P3R00JE TEH70M3R00JE
4 TEH70P4R00JE
5 TEH70P5R00JE TEH70M5R00JE
7.5 TEH70P7R50JE TEH70M7R50JE
10 TEH70P10R0JE TEH70M10R0JE
15 TEH70P15R0JE TEH70M15R0JE
20 TEH70P20R0JE
24 TEH70P24R0JE TEH70M24R0JE
33 TEH70M33R0JE
39 TEH70M39R0JE
47 TEH70P47R0JE TEH70M47R0JE
68 TEH70P68R0JE TEH70M68R0JE
75 TEH70M75R0JE
100 TEH70P100RJE TEH70M100RJE
150 TEH70P150RJE TEH70M150RJE
270 TEH70P270RJE TEH70M270RJE
470 TEH70P470RJE TEH70M470RJE
680 TEH70M680RJE
750 TEH70P750RJE TEH70M750RJE
1000 TEH70P1K00JE TEH70M1K00JE
1500 TEH70P1K50JE TEH70M1K50JE
2000 TEH70P2K00JE TEH70M2K00JE
3000 TEH70M3K00JE
5000 TEH70P5K00JE TEH70M5K00JE
7500 TEH70P7K50JE
10000 TEH70M10K0JE
TEH70 Series
70 Watt TO247 Package
Thick Film Power
DIMENSIONS
(in./mm)
ORDERING INFORMATION
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
152
Derating
Derating (thermal resistance): 0.666W/°K (1.5K/W). Without a heatsink, when in free air at
25°C, the TEH100 is rated for 3.5W. Derating for temp. above 25°C is 0.0234W/°K.
Graphed value is only valid when using a thermal conduction to the heatsink Rth-
cs<0.025°K/W. This value can be reached by using thermal transfer compound with a
heat conductivity of 1W/mK. The flatness of the cooling plate must be better than 0.05mm
overall. The roughness of the surface should not exceed 6.4µm. The case temperature is
to be used for the definitiion of the applied power limit. The case temperature measurement
must be made with a thermocouple contacting the center of the component mounted on the
designed heat sink. Thermal grease should be applied properly
TEH100 Series
100 Watt Thick Film Power Resistors for High
Frequency and Pulse Loading Applications
Resistor thick film on alumina
Case high temperature plastic
Lead Material Tinned Copper
Installation, max.
Torque
0.9 Nm using an M3 screw and a
compression washer
Derating linear, 100% at 25°C to 0% at
175°C
Resistance range 0.05Ω to 1MΩ, other values on
request
Resistance tol. ±1%, ±2%, ±5%, ±10%
Max. working voltage 350V
Temperature
Coefficient
3R to 10R: 100ppm/°C
1R to 2R99: 250ppm/°C
Below 1R: 500-1000+ppm/°C
(Contact factory for exact values
below 1R)
Insulation Resistance 10GΩ min.
Dielectric Strength 1,800 VAC
Test Conditions Of Test Performance
Load life MIL-R-39009D 4.8.13 , 2,000
hours at rated power
∆R ≤ ±(1.0% + 0.0005Ω)
Moisture resis-
tance
-10°C - +65°C, RH>90%, cycle
240 h
∆R ≤ ±(0.50% + 0.0005Ω)
Short time
overload
1.5 times rated power and
V(DC) ≤1.5Vmax for 5 seconds
∆R ≤ ± (0.50% + 0.0005Ω)
Thermal shock GJB360A-96 method 107,
Cond. F
∆R ≤ ±(0.50% + 0.0005Ω)
Dielectric
strength
GJB360A-96 method 301,
(1,800V AC, 60s)
∆R ≤ ± (0.15% + 0.0005Ω)
Terminal
strength
GJB360A-96 method 211,
Cond. A (Pull Test) 2.4N
∆R ≤ ±(0.20% + 0.0005Ω)
High frequency
vibration
GJB360A-96 method 204,
Cond. D
∆R ≤ ±(0.40% + 0.0005Ω)
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
0
80
40
75 100 1751255025 150
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must be
monitored and kept within specified limits to establish
thepowerrating.Besttechniqueistoattachather-
mocouple to the side of the base plate of the resistor.
Temperature of plastic housing or heat sink cannot be
used to establish rating of the resistor.
Ohmite offers the totally
encapsulated and insulated
TO-247 package for low
ohmic value and non-induc-
tivedesignforhigh-frequen-
cy and pulsing applications.
Idealuseisforpowersup-
plies. This series is rated
at 100 Watts mounted to a
heat sink.
FEATURES
•100Wattpowerratingat
25°Ccasetemperature
•Non-inductiveperformance
•Lowthermalresistance
•RoHScompliantdesign
•TO-247packageconfigura-
tion
•Singlescrewmounting
simplifies attach-ment to
the heat sink
•Atotallymoldedhousing
for enviromental protection
•Non-Inductivedesign
•Resistorpackagetotally
insulated from heat sink
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 153
0.610~0.630"
(15.49~16.01mm)
0.805~0.825"
(20.44~20.96mm)
0.200~0.220"
(5.07~5.59mm)
ø0.139~0.147"
(3.53~3.73mm)
0.136~0.150"
(3.45~3.81mm)
“M”
0.054~0.066"
(1.37~1.67mm)
“L”
0.042~0.054"
(1.07-1.37mm)
0.080~0.140"
(2.03~3.55mm)
0.390~0.410"
(9.90~10.42mm)
0.185~0.205"
(4.69~5.21mm)
0.085~0.105"
(2.15~2.67mm)
0.022~0.042"
(0.55~1.07mm)
0.520~0.620"
(13.21~15.75mm)
“M” option
“L” option 0.807~0.886"
(20.50~22.50mm)
TEH100M10R0JE
Series Tolerance
F= 1%
J= 5%
Ohms
R = Decimal
Example:
2R50 = 2.50Ω
25R0=25Ω
100R = 100Ω
1K00 = 1000Ω
RoHS Compliant
Non-compliant
version unavailble
Package Code
M = standard
L = long terminals
Standard part numbers
Ohms 5% tolerance 1% tolerance
0.05 TEH100MR050JE
0.075 TEH100MR075JE
0.1 TEH100MR100JE
0.2 TEH100MR200JE
0.5 TEH100MR500JE
1 TEH100M1R00JE TEH100M1R00FE
2 TEH100M2R00JE TEH100M2R00FE
2.5 TEH100M2R50JE TEH100M2R50FE
3 TEH100M3R00JE TEH100M3R00FE
5 TEH100M5R00JE TEH100M5R00FE
7.5 TEH100M7R50JE TEH100M7R50FE
10 TEH100M10R0JE TEH100M10R0FE
15 TEH100M15R0JE TEH100M15R0FE
20 TEH100M20R0JE TEH100M20R0FE
25 TEH100M25R0JE TEH100M25R0FE
50 TEH100M50R0JE TEH100M50R0FE
100 TEH100M100RJE TEH100M100RFE
270 TEH100M270RJE
470 TEH100M470RJE
750 TEH100M750RJE
1K TEH100M1K00JE
5K TEH100M5K00JE
7.5K TEH100M7K50JE
TEH100 Series
100 Watt Thick Film Power Resistors for High
Frequency and Pulse Loading Applications
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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154
CHARACTERISTICS
TGH Series
120 and 200 Watt SOT227Package
Thick Film Power
Heat Sink Nickel-plated copper
Contacts Nickel-plated copper
Substrate Al203 (96%)
Molding Compound High-performance epoxy, compliant to UL94-V0
Terminal Nuts American standard 303 stainless steel
Resistance Range 0.1Ω to 1MΩ
Tolerance ±5%; other tolerances available on request
Temperature coefficient: ±250ppm (at +105°C ref. to +25°C)
Max. Work.Voltage 500V (up to 1,000V on special request)
Power Rating at 85°C 120W (see derating)
Partial Discharge up to 2,000Vrms/80 pC
Voltage Proof Dielectric Strength up to 4,000V DC against ground
Heat Resistance to Cooling Plate Rth <0.35 K/W
Capacitance/Mass 45pF
Working Temp. Range -55°C to +155°C
Max. Torque for Base Plate (static) 1.5 Nm
Max. Torque for Contacts (static) 1.3 Nm. M4 screws (not included)
Derating (thermal resistance) 2.86W/°K (0.35°K/W)
Derating
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0175
80
40
25 100 12505085
200
Rated Power, W
120
40
0
160
80
150
120
72
24
0
96
48
LHType:
1
4
12
Config. 1Config. 2
Duetotheirnon-inductivedesign,theseresistorsare
ideallysuitedforhigh-frequencyandpulse-loadapplica-
tions.Availablein120-or200-wattsizes,thisresistor
is designed for direct mounting onto a heatsink. Popular
applications include variable speed drives, power sup-
plies, control devices, telecom, robotics, motor controls,
and other switching designs.
Best results can be reached by using a
thermal transfer compound with a heat
conductivity of better than 1W/mK
Configurations
(per package)
PERFORMANCE DATA
(continued)
Test Method ΔR
Moisture Resistance MIL-Std-202, Method 106 (0.5% + 0.001W) max
Thermal shock Mil-Std-202, Method 107, Cond F (0.3% + 0.01W) max
Terminal Strength MIL-Std-202, Method 211, Cond A (pull test) 2.4N (0.2% = 0.01W) max
Vibration, High Frequency MIL-Std-202, Method 204, Cond D (0.2% + 0.01W) max
Life 20 years (120,000 hours) Operating failure rate of 8.3 x 10-7 fail/hour.
Requirements to be achieved under the following conditions: Tamb=25°C, THS=70°C, Papplied=Pn
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DIMENSIONS
(iin./mm)
ORDERING INFORMATION
0.209"
(5.3mm)
max.
12
43
M4
1.235" Ref.
(31.35mm)
0.165" ±0.005
(4.2mm ±0.13)
0.591" ±0.005
(15.0mm ±0.13)
1.190" ±0.010
(30.2mm ±0.26)
1.501" ±0.005
(38.1mm ±0.13)
0.473" ±0.010
(12.0mm ±0.26)
0.032" ±0.002
(0.80mm ±0.05)
0.500" ±0.010
(12.7mm ±0.26)
0.980" ±0.021
(24.9mm ±0.5)
0.079" ±0.002
(2.00mm ±0.05)
SOT 227 Series
Configuration
V = config. 1
X = config. 2
Resistance Value
Example:
R500 = 0.500Ω
1R00 =1Ω
250R = 250Ω
1K00 = 1,000Ω
10K0 = 10,000Ω
TGHHV1R00JE
Wattage
H=120W
L=200W
E = RoHS compliant
Tolerance
J= 5%
Standard Part Numbers
Ohms 120 Watt TGHH 200 Watt TGHL
0.1 TGHHVR100JE TGHLVR100JE
0.5 TGHLVR500JE
1 TGHHV1R00JE TGHLV1R00JE
5 TGHHV5R00JE
10 TGHHV10R0JE TGHLV10R0JE
25 TGHLV25R0JE
33 TGHHV33R0JE TGHLV33R0JE
50 TGHHV50R0JE
100 TGHHV100RJE TGHLV100RJE
150 TGHHV150RJE TGHLV150RJE
500 TGHHV500RJE TGHLV500RJE
680 TGHHV680RJE TGHLV680RJE
1K TGHHV1K00JE TGHLV1K00JE
5K TGHHV5K00JE TGHLV5K00JE
10K TGHHV10K0JE TGHLV10K0JE
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
TGH Series
120 and 200 Watt SOT227 Package
Thick Film Power
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156
TGHG Series
Precision Current Sense Resistors
Heat Sink Nickel-plated copper
Terminal Nuts American standard 303 stainless steel
Standard Resistance Values 0.5mΩ-1Ω, others on request
Resistance Tolerances 0.5% (0.0005 thru 0.022Ω), 1%, 5%
Temperature Coefficient referenced to 25°C, ∆R taken at -15°C and +105°C,
<60ppm/°C; <500ppm/°C for resistance range 27mΩ-49mΩ)
Power Rating 100W at 70°C case temperature; 50Amp permanent (higher
on request)
Dielectric strength 1000VDC, higher value on request
Heat Resistance Rth <0.56K/W
Protection class acc. to IEC 950/CSA22.2 950/M -89 and EN 60950.88:2
Working Temp. Range -55°C to +155°C
Max. Torque for Contacts 1.3Nm 8 (static)
Max Torque for Base Plate 1.5 Nm (static)
Maximum Cont. Amperage 200 amps depending on ohmic value; only available in 10%
Derating
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0175
80
40
25 100 12505070
Rated Power, W
150
100
60
20
0
80
40
GType:
FEATURES
•Resistancevaluesbeginningat0.5mΩ
•NonInductive
•FourterminalKelvinconnection
•SOT227Package
•Fourterminalstoisolatemeasurementpath
from current flow path
•Accuracyinahighpowerpackage
Best results can be reached by
using a thermal transfer compound
with a heat conductivity of better
than1W/mK
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablishthepowerrating.Besttechniqueistoattacha
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
TheTGHGSeriesuses
state of the art technol-
ogy to provide highly
reliable, non inductive
performance. This resis-
tor is ideal for many
current monitoring and
controls applications.
CHARACTERISTICS
(continued)
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TGH = series
Configuration
C = current sense
Resistance Value
Example:
R0200=0.02 ohms
TGHGCR0200FE
Wattage
G= 100W
E = RoHS compliant
Tolerance
D= 0.5%
F = 1%
J = 5%
Standard part numbers
Ohms 100 Watt TGHG
0.00050 TGHGCR0005FE
0.00100 TGHGCR0010FE
0.00200 TGHGCR0020FE
0.00500 TGHGCR0050FE
0.01000 TGHGCR0100FE
0.01500 TGHGCR0150FE
0.02000 TGHGCR0200FE
0.02500 TGHGCR0250FE
0.05000 TGHGCR0500FE
0.0750 TGHGCR0750FE
0.1000 TGHGCR1000FE
0.209"
(5.3mm)
max.
1.235" Ref.
(31.35mm)
0.165" ±0.005
(4.2mm ±0.13)
0.591" ±0.005
(15.0mm ±0.13)
1.190" ±0.010
(30.2mm ±0.26)
1.501" ±0.005
(38.1mm ±0.13)
0.473" ±0.010
(12.0mm ±0.26)
0.032" ±0.002
(0.80mm ±0.05)
0.500" ±0.010
(12.7mm ±0.26
)
0.980" ±0.021
(24.9mm ±0.5)
0.079" ±0.002
(2.00mm ±0.05)
CC
SS
M4
C = current connection (source)
S = voltage connection (sense)
DIMENSIONS
ORDERING INFORMATION
TGHG Series
Precision Current Sense Resistors
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158
TL Series
Modular Heat Sinkable
Thick Film Power
Thermal Resistance
Ultra* Std** Nominal Surge Load Max. Voltage Ohm Ultra Std.
Series Wattage Wattage Power (10 sec.) between terminals Range (10% tol.) (3%-5% tol.)
TL54 35 27 18 72 1000 0.3Ω - 1MΩ 1.26 1.67
TL71 96 71 48 192 2000 1.0Ω - 2MΩ 0.53 0.70
TL88 155 114 78 312 2500 1.5Ω - 3MΩ 0.34 0.45
TL104 215 158 108 432 2500 2.0Ω - 4MΩ 0.25 0.33
†TL122 275 202 137 548 2500 2.0Ω - 4MΩ
* For properly heat sinked, untrimmed resistors - see chart
** For properly heat sinked, trimmed resistors - see chart
† Power Ratings are theoretical. Consult Factory for details.
Operating voltage 1200 VAC
Dielectric Withstanding Voltage 2500 VAC
Resistive Element Thick Film on Alumina
Housing Aluminum
Insulators Glass reinforced high temperature Valox®
Terminals Tinned brass
Power Range 27 – 275 watts
Resistance Range 0.3Ω – 4MΩ
Tolerance Ultra Power (U Style): ±10% std.
Standard Power: ±10% std.; 5% and 1% available
Temperature Coefficient ±250 PPM
Test Voltage for 1 Minute 6000 VDC/2500 VAC
Working Voltage 1200 VAC
External Creeping Distance 12mm
Temperature Limits -40°C to +125°C
Insulation >1002 MΩ/500V
Air Distance, Terminal to Ground 7mm
Inductance 50-100 nH
THIS PRODUCT IS
DESIGNED FOR USE WITH
PROPER HEATSINKING.
Maximum base plate temperature of the
resistor must be monitored and kept
within specified limits to establish the
powerrating.Besttechniqueistoattach
a thermocouple to the side of the base
plate of the resistor. Temperature of plastic
housing or heat sink cannot be used to
establish rating of the resistor.
TheTLSeriesaddheatsinkableoptionstothe
thick film resistor family. The resistor element
ispackagedwithplasticinsulators,andquick-
connect terminals in a symmetrical aluminum
profile for easy heat sink mounting. Special
tapped configurations are offered to reduce on
board component count.
Efficient thermal packaging provides improved
heat conduction to the heat sink. Self-insulating
package design increases voltage withstanding
characteristics when compared to traditional
aluminum housings. The in line mounting profile
makestheTLSerieseasilyadaptabletomost
heat sink systems. Thermal compound is always
recommended when heat sinking.
FEATURES
•Verylowinductance
•Lowprofiledesign
•In-LineMounting
Profile
•1/4”Quickconnectter-
minals
•Consultfactoryfor
common, isolated, or
special multiple tap
options.
SERIES SPECIFICATIONS
APPLICATIONS
•SemiconductorBalancing
•FrequencyConverters
•Snubber
•In-RushCurrentLimiter
•BleederResistor
•PowerSwitching
•VoltageDividers
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 159
TL Series
Modular Heat Sinkable Thick Film Power
POWER RATINGS
MaximumandnominalpowerratingsforUltraPowerandStandardPowerresistors
DIMENSIONSORDERING INFORMATION
TL54 TL71
TL88
TL104
TL122
Wattage
Heat sink temp, ϒC
020406080 100 120 140 160
100
0
TL104
Ultra Power
Standard Power
Nominal Ultra Power
Nominal Standard Power
150
200
250
50
Wattage
Heat sink temp, ϒC
020406080 100 120 140 160
40
0
20
30
10
TL54
Ultra Power
Standard Power
Nominal Ultra Power
Nominal Standard Power
Wattage
Heat sink temp, ϒC
020406080 100 120 140 160
120
0
80
100
20
TL71
Ultra Power
Standard Power
Nominal Ultra Power
Nominal Standard Power
60
40
Wattage
Heat sink temp, ϒC
020406080 100 120 140 160
100
0
TL122
Ultra Power
Standard Power
Nominal Ultra Power
Nominal Standard Power
150
200
300
50
250
Wattage
Heat sink temp, ϒC
020406080 100 120 140 160
120
0
80
100
20
TL88
Ultra Power
Standard Power
Nominal Ultra Power
Nominal Standard Power
60
40
140
160
180
TL104K–––
Ohmic value
TL54K–––
TL71K–––
TL88K–––
TL122K–––
Part No.
Prefix
Suffix
TL104K–––
Ohmic value
TL54K–––
TL71K–––
TL88K–––
TL122K–––
Part No.
Prefix
Suffix
=Standardvalues
=Non-standardvaluessubjectto
minimum handling charge per
item
TL104KUR500CE
Size
TL54 = 54 mm
TL71 = 71 mm
TL88 = 88 mm
TL104 = 104 mm
TL122 = 122 mm
Tolerance
F= 1%
J=5%
K= 10%
Power
U = ultra
(optional)
Center tap
(optional)
Ohms
R500 = 0.50
10R0=10.0
1K00 = 1,000
1M00 = 1,000,000
E = RoHS compliant
0.5 ––– R50
1.0 ––– 1R0
1.5 ––– 1R5
2.0 ––– 2R0
3.0 ––– 3R0
4.0 ––– 4R0
5.1 ––– 5R1
10.0 ––– 10R
15.0 ––– 15R
22.0 ––– 22R
47.0 ––– 47R
75.0 ––– 75R
100.0 ––– 100
150.0 ––– 150
220.0 ––– 220
240.0 ––– 240
470.0 ––– 470
510.0 ––– 510
750.0 ––– 750
1,000.0 –––1K0
1,100.0 –––1K1
2,200.0 –––2K2
4,700.0 –––4K7
5,100.0 –––5K1
10,000.0 –––10K
22,000.0 –––22K
51,000.0 –––51K
0.20"
5.10 mm
A
B
0.98"
25 mm
Profile 1.01"
25.7 mm
Footprint 0.96"
24.4 mm
C*
0.25"
6.3 mm
*For adjacent taps,
C = 0.665"
(16.9mm)
TL54 TL71 TL88 TL104 TL122
A mm 54 71 88 104 122
B mm 46 63 80 96 114
C mm 16.9 33.8 50.7 67.6 84.5
Weight g 26 33 44 55 65
Consult factory for multiple tap options in common, iso-
lated, and special configurations.
Standard part numbers
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160
SERIES SPECIFICATIONS
S Series
High Current Shunts
Terminal Rated Voltage Accuracy
Series Type Construction Current (mV) Class
SHD1-100C060DE DIN Plate 100 60 0.50%
SHT1-250C060DE T Plate 250 60 0.50%
SHL1-600C060DE L Plate 600 60 0.50%
SHL1-1K2C060DE L Plate 1200 60 0.50%
SHD1-100C075DE DIN Plate 100 75 0.50%
SHT1-200C075DE T Plate 200 75 0.50%
SHT1-500C075DE T Plate 500 75 0.50%
SHL1-1K0C075DE L Plate 1000 75 0.50%
SHT1-500C100DE T Plate 500 100 0.50%
FEATURES
•100-1200Aratings
•60mvand75mvversions
•0.5%accuracyclass
•Manganin(6J13)plateresistive
element construction
•T,L,andDINtypeterminals
•H59-1(UNS37700)Brass
Terminal Construction
CHARACTERISTICS
Terminal Surface Coating Acid Wash and Passivation
Resistor plate surface coating Acid Wash and Passivation
Method of measurement Null Balance Resistance Bridge
National standard GB/T7676-1998 (Direct acting indicating analog electrical measuring
instruments and their accessories)
Safety standard IEC610101-1: 1890 (Safety requirements for electrical equipment for mea-
surement, control, and laboratory use-Part I: General requirements)
Environmental standard SJ/T11363-2006 (Requirements for concentration limits for certain hazard-
ous substances in electronic information products)
Derating linearly from 25°C to 85°C
DIMENSIONS
in./mm
2-M5
0.18" (4.5mm ±.5)
2-φ8.5 +.5/-0
0.87"
(22mm ±1)
0.24"
(6mm ±1)
0.35" (9mm ±1)
1.69"
(43mm ±1)
0.47" (12mm ±1)
3.35" (85mm ±1)
1.02"(26mm ±1) SHT1-250C060DE 4.61" (117mm ±1)
0.87"(22mm ±1) SHT1-200C075DE 4.57" (116mm ±1)
1.97" (50mm ±1)
3.35" (85mm ±1)
4.09" (104mm ±1)
1.26"
(32mm ±1)
2-φ8.5 +.5/-0 2-M5
0.39"
(10mm ±1)
0.87"
(22mm ±1)
SHT1-250C060DE
SHT1-200C075DE SHD1-100C060DE
SHD1-100C075DE
(continued)
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S Series
High Current Laboratory Shunts
DIMENSIONS
(continued) in./mm
HOW TO ORDER
SHL1-1K0C075DE
Series
Current
1K0 = 1000 amps
500 = 500 amps
200 = 200 amps
100 = 100 amps
mV
075 = 75mV
025 = 25mV
050 = 50mV
060 = 60mV
Tolerance
D = ±0.5%
F = ±1%
Terminal Type
T = T-type
D = DIN-type
L = L-type
Terminal Material
C = copper surface
treatment (std.)
N = nickel plating
RoHS Compliant
3.94" (100mm ±1)
4.96" (126mm ±1)
0.24"
(6mm ±1)
2-φ10.5 +.5/-0 2-M5
1.81"
(46mm ±1)
0.18"
(4.5mm ±.5)
1.69"
(43mm ±1) 0.47"
(12mm ±1)
0.35"
(9mm ±1)
0.71"
(18mm ±.5)
0.87"
(22mm ±1)
4.72" (120mm ±1)
6.69" (170mm ±1)
1.57"
(40mm ±1)
2.36"
(60mm ±1)
1.97"
(50mm ±1) 4-Ø11 +.5/-0
2.56"
(65mm ±1)
0.39"
(10mm ±1)
1.57"
(40mm ±1)
0.39"
(10mm ±1)
SHL1-1K2C060DE
SHL1-1K0C075DE
SHT1-500C075DE SHL1-600C060DE
SHT1-500C100DE
1.57" (40mm ±1)
1.57"
(40mm ±.5)
Ø 0.53"
(13.5mm ±.5)
45° chamfer
Ø 0.20" (5mm ±.5)
Ø 0.59"
(15mm ±.5)
1.46" (37mm ±.5)
2-M3
3.15" (80mm ±1)
4.13" (105mm ±1)
4.72" (120mm ±1)
2.72" (69mm ±1)
5.75" (146mm ±1)
0.24"
(6mm ±.5)
2-Ø10.5 ±.2 2-M5
1.77"
(45mm ±.5)
1.69"
(43mm ±.5) 0.47"
(12mm ±.5)
0.35"
(9mm ±.5)
0.71"
(18mm ±.5)
0.87"
(22mm ±.5)
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162
SH Series
Precision Metal-Clad Shunts
Rated Rated
Current Voltage Resistance
Series (A) (mV) (mΩ)
SH2 100 100 1.0000
150 100 0.6666
200 100 0.5000
SH3 250 100 0.4000
300 100 0.3333
Temp. Range -55°C ~ +110°C
Insulation Resist. 100MΩ min.
Dielectric
Withstanding Voltage
AC 500V for
1 minute
Temp. Coefficient Max. 30ppm/°C
[20°C and 60°C]
Lead Wire UL1331 AWG 16
with red insulation
Precision metal clad resistors designed in four-
terminaltechnique,aredistinguishedbyhighload
capacityaswellasexcellentaccuracy.Isolatedvolt-
age and current connections making them suitable
for very precise current measurements. The simple
fourportKelvindesignensureseasyinstallationon
largecurrentbusbars.Unitshavealowinductance,
heavycopperterminals.Applicationsinclude:battery
testing, current detection in precise power sources,
constant current sources, industrial power conver-
sioncircuits,HEVs,fuelcellsandconstantelectronic
loads.
Test Method Maximum ∆R
Short Time
Overload
5x Power rating 5 sec. ±0.3%
Moisture
Resistance
40°C, 95% RH, DC100V case
to terminal, 500 hours
±0.5%
Thermal
Shock
-65°C 30 minutes, +90°C 30
minutes 25 cycles
±0.2%
Vibration 10Hz-55Hz-10Hz (1min.), 2
hours each direction
±0.2%
Moisture
Load Life
40°C, 95% RH, 0.1XPower rat-
ing 1.5 hours on, 30 minutes
off, 500 hours
±0.5%
Load Life Power rating 1.5 hours on, 30
min. off, 500 hours
±0.5%
CERTIFICATIONS
BNESISO9001:2008
ISO/TS16949:2009
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
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SH2-200R0005DE
Series CurrentSize Tolerance
B = ±0.1%
D = ±0.5%
Resistance
see table
RoHS Compliant
Standard part numbers
Rated Rated
Current Voltage Resistance Resistance
Part (A) (mV) (mΩ) Tolerance
SH2-100R0010DE 100 100 1.0000 0.5%
SH2-150R0006DE 150 100 0.6666 0.5%
SH2-200R0005DE 200 100 0.5000 0.5%
SH3-250R0004DE 250 100 0.4000 0.5%
SH3-300R0003DE 300 100 0.3333 0.5%
Current Mass L1 L2 L3
Series (A) (g) ±1.5 ±2 ±2
SH2 100 650 146 165 225
150 650 146 165 225
200 650 146 165 225
SH3 250 1100 196 215 275
300 1100 196 215 275
60mm ±.5
400mm ±10
40mm ±.5 30mm ±.2
30mm ±1
6.5ø 10 slot
ø6.5 holes
ø6.0 holes
L2 ±1.5
L1 ±1.5
L3 ±2
SH Series
Precision Metal-Clad Shunts
DIMENSIONS
(mm)
ORDERING INFORMATION
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164
B60/C60 Series
Heat Sink System
Ohmite introduces the powerful B60/
C60 series heatsink with cam clip (Pat.
Pending) or custom mounting. This
series offers flexible, high performance
and compact heat sink with exchange-
able cam clip system for TO-247 and
TO-264 devices. The built in lip is pro-
vided for mounting ease. The optional B
series can be tapped for popular Ohmite
resistors or other devices. These power-
ful heat sinks can be thru-hole soldered
as a single or dual unit. The dual unit
can be mated to a 60mm fan for greater
thermalperformance.Itistheidealtype
of heat sink for high power density and
smallsize(3Uor4U)electronicpackag-
ing with forced convection.
CHARACTERISTICS
Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black
anodized finish.
Spring Clip Music Wire, Per ASTM A228 with bright nickel plating
Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike.
RoHS compliant.
Fan 60mm fan with 4 self-tapping M3.5 screws
Interface Thermal
Resistance
For improvement, use thermal joint compound, 0.005 Grafoil (TGon
800 by Laird), or phase change material (Hi-Flow by Bergquist)
Insulator (Optional) Sil-Pad 900-S, K6 800-S and K10 by Bergquist
Heatsink Surface Area Weight Length L
Part Number (in2 / mm2) (oz / g) (mm)
C60-075-VE 177 / 114,300 5.7 / 163 75
C60-075-AE
B60-075-VE 177 / 114,300 5.7 / 163 75
B60-075-AE
SERIES SPECIFICATIONS
consult factory for
alternate lengths and
clip combinations
Fan Flow Rate (cfm)
30 40 5020
Thermal Resistance from Case to
Ambient per Device (oC/watts)
0
1.5
2
1
0.5
2 devices
4 devices
Heat Dissipation
(continued)
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DIMENSIONS
HOW TO ORDER
B60/C60 Series
Heat Sink System
0.079"
(2mm)
0.12"
(3mm)
0.08"
(2mm)
0.17"
(4.3mm)
1.19"*
(30.2mm)
1.97"*
(50mm)
0.16"
(3.9mm)
0.31"
(8mm)
0.47"
(12mm)
1.61
(41mm)
2.48"
(63mm)
2.58"
(65.5mm)
2.95"
(75.0mm)
1.97"
(50mm)
2.79"
(71.0mm)
2x 0.079"
(2mm)
0.049"
(1.25mm)
0.12"
(3mm)
0.32"
(8.1mm)
2.95"
75.0mm
1.61"
(41mm)
2.63"
(66.7mm)
2.53"
(64.2mm)
2.07"
(52.7mm)
0.17"
(4.3mm)
0.080"
(2.03mm)
2.78" REF
(70.7mm) 2.74" REF
(69.5mm)
LAND
PATTERN
2x ø
0.11" pth
(2.8mm)
6x ø
0.07" pth
(1.8mm)
2x 0.08"
(2.0mm)
0.18"
(4.06mm)
L – 0.16"
(0.16mm)
Clip Dimensions
C60
B60
0.43"
(11mm)
W +0.12"
(+3.0mm)
W
0.78"
(19.8mm)
1.39" REF
(35.3mm)
"W"
T247 0.63" (16.1mm)
T264 0.80" (20.2mm)
L
X
Y
NOTE:Duetopos-
siblescrewtorquing
on long extrusions,
Customer should
check for coplanarity
prior to final assem-
bly or soldering.
C60XX-058-AE
Series
B = without lip
C = with lip
Length
(mm)
Hole
pattern
(optional)
Finish
A = black anodized
V = degreased
RoHS compliant
Clip series Device type
T247 = TO-247
T264 = TO-264
Standard
configuration
RoHS
compliant
CLA-T247-21E
Heatsink Clip
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166
Surface
Heatsink Area Weight Length “L”
Part Number (in2/mm2) (oz/g) (mm)
C247-025 11 / 7,312 0.5 / 15 25
C247-050 23 / 14,858 1.1 / 31 50
C247-075 34 / 21,655 1.6 / 45 75
C264-030 13 / 8,774 0.7 / 19 30
C264-058 25 / 16,963 1.35 / 37 58
C264-085 37 / 24,861 1.97 / 54 85
C220-025 11 / 7,312 0.5 / 15 25
C220-050 23 / 14,858 1.1 / 31 50
C220-075 34 / 21,655 1.6 / 45 75
C126-025 10.2 / 6,559 0.45 / 12.7 25
C126-040 16.3 / 10,495 0.72 / 20.3 40
C126-050 20.4 / 13,119 0.90 / 25.4 50
C126-075 30.6 / 21,655 1.35 / 38.1 75
Ohmite introduces the C series (Pat. Pending). This
series offers high performance, low cost and a
compact heat sink with an integrated camming clip
system for TO-126, TO-220, TO-247 and TO-264
devices. This powerful heat sink provides tool and
fixture free assembly operation, largest surface areas
andsmallestspaceoccupation.Itistheidealtypeof
heatsinkforhighpowerdensityandsmallsize(1U
or2U)electronicpackagingwithforcedconvection
cooling.
FEATURES
•MinimumassemblycostandlaborSpringClips
make the mounting holes, fasteners, tools and
fixturesobsoleteinassemblyoperations&reduce
costs.
•MaximumThermalTransferMaximumsurfacearea
perunitvolume,efficientcoolingfins&consistent
mounting force reduces thermal resistance.
•MaximumRepeatabilityConstantspringforceover
repeated assembly/disassembly.
•MaximumReliabilityResilientspringactionlocks
electroniccomponentinplace.Fewerpartsin
assemblyandnofastenersandwashersrequired.
Prevent short circuit by eliminating metal particles
generated from hardware or thread tapping.
•DesignFlexibilityMaximumflexibilityfordynamic
device locations and power upgrading. “Configure-
to-Fit”givesdesignerstotalfreedomtoconfigure
heat sink needed to fit into a multitude design envi-
ronments.
C Series
TO-126, TO-247, TO-220
and TO-264 Package Heatsinks
CHARACTERISTICS
Heat Sink Aluminum Alloy 6063-T5 or Equivalent
with either degreased or black anod-
ized finish.
Spring Clip Music Wire, Per ASTM A228 with
bright nickel plating
Solder Foot Cold-rolled Steel, Per ASTM A-366
with pure tin over copper strike. RoHS
compliant.
Interface
Thermal
Resistance
for improvement, use thermal joint
compound, 0.005 Grafoil (TGon 800
by Laird), or phase change material
(Hi-Flow by Bergquist)
Insulator(Optional) Sil-Pad 900-S, K6 800-S
and K10 by Bergquist
SERIES SPECIFICATIONS
HEAT DISSIPATION
Case Temp. Rise above Ambient (°C)
Heat Dissipated, total for ALL devices (watts)
120
80
0
510
100
150
140
Thermal Resistance from Mounting
Case to Ambient (°C/watts)
2
1
0
3
8
7
9
600200 400 1000
60
40
20
5
6
4
Air Velocity (ft./min.)
800
C247-025-1AE (1 device)
C247-050-2AE (2 devices)
C247-075-3AE (3 devices)
HeatdissipationisthetotalforALLDEVICESattachedtoheatsink.
Average Heat Sink Temp. Rise
above Ambient (°C)
Total Heat Dissipated (watts)
36
32
22
6 7 8 9 10
34
2 3 4 5
38
Avg. Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
12
10
600200 400 1000
30
28
24
26 6
8
4
Air Velocity (ft./min.)
800
TO-126/CE-S102 (25mm long)
one device w/Sil-pad 900s
(continued)
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Land Pattern
XandYdimensionsatuserdiscretion
L – 0.16"(4.06mm)
ø 0.07" pth typ
(1.8mm)
ø 0.10" pth
(2.5mm)
C
L C
L
Y X
0.71"
(18.0mm)
TO-126
0.73"
(18.6mm)
0.08"
(2.0mm)
0.18"
(4.6mm)
L
C247-025-1AE
Series No. of
clips
Clip size Finish
A = black anodized
V = degreased
Length
(mm)
RoHS Compliant
C Series
TO-126, TO-247, TO-220 and TO-264 Package Heatsinks
Standard part numbers
No Finish (degreased) Black Anodized No. of Clips
C247-025-1VE C247-025-1AE 1
C247-050-2VE C247-050-2AE 2
C247-075-3VE C247-075-3AE 3
C264-030-1VE C264-030-1AE 1
C264-058-2VE C264-058-2AE 2
C264-085-3VE C264-085-3AE 3
C220-025-1VE C220-025-1AE 1
C220-050-2VE C220-050-2AE 2
C220-075-3VE C220-075-3AE 3
C126-025-1VE C126-025-1AE 1
C126-040-2VE C126-040-2AE 2
Packaging: Bulk
DIMENSIONS
HOW TO ORDER
0.71"
(18mm)
1.50"
(38mm)
1.12"
(28.5mm)
0.10"
(2.5mm)
0.785"
with TO-220
(19.94mm)
with TO-126
TO-126 & TO-220
TO-247
TO-264
0.806"
with TO-247
or TO-264
(20.47mm)
0.385"
(9.78mm)
0.100"
(2.54mm)
0.73"
(18.6mm)
1.28"
(32.5mm)
0.73"
(18.5mm)
0.10"
(2.5mm)
0.77"
(19.6mm)
0.385"
(9.78mm)
0.100"
(2.5mm) L-0.16" (4.06mm)
(all models)
0.35"
(8.89mm)
0.08"
(2.08mm)
(all models)
0.57"
(14.48mm)
0.73"
(18.54mm)
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168
C40 Heat Sink System
For TO-247, TO-264 and SOT-227 Packages
TheC40SeriesHeatSinkSystem(PatentPending)
offers flexible, high performance and compact heat
sinks with an exchangeable cam clip system for TO-
247, TO-264 and SOT-227 (clip in development)
devices. This powerful heat sink can be thru-hole
soldered in single or paired configurations. The paired
unit has mounting holes to accomodate a 40mm x
40mmfan.Itistheidealtypeofheatsinkforhigh
powerdensityandsmallsize(1Uor2U)electronic
packaging with forced convection.
Paired Heat
Sink Mounting
With a FAN
Single
Mounting
CHARACTERISTICS
Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black
anodized finish.
Spring Clip Music Wire, Per ASTM A228 with bright nickel plating
Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike.
RoHS compliant.
Fan 40mm fan with 4 self-tapping M3 screws
Interface Thermal
Resistance
For improvement, use thermal joint compound, 0.005 Grafoil (TGon
800 by Laird), or phase change material (Hi-Flow by Bergquist)
Insulator (Optional) Sil-Pad 900-S, K6 800-S and K10 by Bergquist
Heatsink Surface Area Weight Length L
Part Number (in2 / mm2) (oz / g) (mm)
C40-058-VE 63.8 / 41,180 2.5/ 71 58
C40-058-AE
SERIES SPECIFICATIONS
consult factory for
alternate lengths and
clip combinations
Fan Flow Rate (cfm)
10 20 300
Thermal Resistance from Case to
Ambient per Device (°C/watts)
2
0
2.5
3
1.5
1
0.5
2 devices
4 devices
Heat Dissipation
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 169
DIMENSIONS
HOW TO ORDER
C40 Heat Sink System
For TO-247, TO-264 and SOT-227 Packages
4x ø 0.11" pth
(2.8mm)
1.72"
(43.8mm)
2.52"
(64.0mm)
1.26"
(32.0mm)
1.82"
(46.3mm)
1.18"
(29.9mm)
1.37"
(34.7mm)
1.82"
(46.3mm)
0.79"
(20mm)
0.10"
(2.5mm) 0.10"
(2.6mm)
1.26"
(32mm) 0.47"
(12mm)
1.18"
(29.9mm)
0.58"
(14.6mm)
L
Y
X
2x 0.08"
(2.0mm)
2x 0.08"
(2.0mm)
2x 0.18"
(4.06mm)
2x 0.10"
(2.5mm)
L – 0.16"
(0.16mm)
L – 0.16"
(0.16mm)
L
Back-to-back Configuration
(This configuration can accept a 40x40mm fan)
Single Mounting
Clip Dimensions
LAND
PATTERN
LAND
PATTERN
2x ø
0.11" pth
(2.8mm)
6x ø
0.07" pth
(1.8mm)
L
Y
X
2x 0.08"
(2.0mm)
0.18"
(4.06mm)
L – 0.16"
(0.16mm)
0.43"
(11mm)
W +0.12"
(+3.0mm)
W
0.78"
(19.8mm)
1.39" REF
(35.3mm)
"W"
T247 0.63" (16.1mm)
T264 0.80" (20.2mm)
NOTE:Duetopossiblescrewtorquingonlongextrusions,Customer
should check for coplanarity prior to final assembly or soldering.
Series Length
(mm)
Finish
A = black anodized
V = degreased
RoHS compliant
C40-058-AE
Clip series Device type
T247 = TO-247
T264 = TO-264
S227 = SOT-227
(in development)
Standard
configuration
RoHS
compliant
CLA-T247-21E
Heatsink Clip
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170
D Series
Heatsink For TO-252, TO-263
and TO-268 devices
HEAT DISSIPATION
FEATURES
•Increasedsurfaceareasby3timesthereforether-
mal performance up to 300% over the aluminum
stamped heat sinks on markets
•Lightweightaluminumconstructionallowsfaster
pick and place assembly reducing the manufactur-
ing cycle time
•Radiusmounted“Rollers”aredesignedformaxi-
mizingheattransferfromthecomponentand
avoidingthethermal“bottle-neck”seeninstamped
and staked heatsinks.
•Availableinbulkpackagingortape&reel(250
units per reel
•RoHSCompliant
OhmiteDSeriesheatsinksprovideaninnovative
solution for SMT compatible semiconductors and
resistors.Theuniquedesign(PatentPending)com-
bines tin plated, solderable rods with an aluminum
extrudedheatsinkbody.Theserods(or“rollers”)
are mated mechanically to the heatsink by forging to
reduce the thermal resistance between the heatsink
body and the solderable feet.
Specifically designed for use with the increasingly
popular TO-252, TO-263 and TO-268 packages, the
DSeriesaffordstheusersuperiorthermalperfor-
mance over the more common stamped aluminum
heatsinks. By eliminating the staking joint typically
used in stamped heatsinks, the resulting air gap and
thermal“bottle-neck”isalsoeliminated,whilesur-
faceareaforcoolingismaximizedwiththeextruded
finsoftheDSeriesbody.
Finalthermalperformance
is highly dependent on the
thermal characteristics of
thePCB.Itispossibletosee
a 50% drop in temp rise in
natural convection with a
thermally improved PCB.
800400 600
50
Heat Dissipated (watts)
40
30
25
84
45
35
2610
60
14
6
4
8
10
12
200 1000
Air Velocity (ft./min.)
55
Case Temp. Rise above
Ambient (oC)
Thermal Resistance from Mounting
Surface to Ambient (oC/watts)
TO-252 (D)
TO-263 (D2)
101 & 201
301
Case Temp. Rise above
Ambient (oC)
Heat Dissipated (watts)
40
30
25
84
45
35
2610
50
Thermal Resistance from Mounting
Surface to Ambient (oC/watts)
6
2
4
8
10
12
800400200 600 1000
Air Velocity (ft./min.)
TO-268 (D3)
101 & 201
301
DIMENSIONS
±0.012” / ±0.30mm
0.56" (14.2mm)
0.44" (11.2mm)
0.27"
6.86mm
0.40"
10.16mm
0.10"
2.54mm
0.50"
12.7mm
TO-252 (D)
TO-263 (D2)
1.02"
25.91mm
TO-268 (D3)
1.22"
30.9mm
TO-252 (D)
TO-263 (D2)
0.76" (19.2mm)
0.64" (16.2mm) TO-268 (D3)
±0.2mm
0.50"
12.7mm
0.64"
16.2mm ±0.2
0.76"
19.2mm ±0.2
0.15"
3.7mm
0.46"
11.6mm 0.26"
6.6mm
1.02"
25.9mm
0.44"
11.1mm
0.56"
14.1mm
0.50"
12.7mm
0.48"REF
12.1mm
0.09"
2.3mm
0.26"
6.6mm
Style 10 Style 30Style 20 TO-268 (D3)
1.58"
40.2mm
TO-263 (D2)
1.22"
31.0mm
TO-263 (D2)
0.44"
11.2mm
0.56"
14.2mm
TO-268 (D3)
(continued)
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LAND PATTERNS
LandPatternsforD,D2andD3
ORDERING INFORMATIONTAPE AND REEL
Reeldiameter:13.00”(330.00mm)
200 pcs. per
Standard part numbers For D Series
Part Number Description Packaging Weight
DV-T263-101E for D2 pack, degreased Bulk 3.8 g
DA-T263-101E for D2 pack, black anodized Bulk 3.8 g
DV-T263-101E-TR for D2 pack, degreased Reel 3.8 g
DA-T263-101E-TR for D2 pack, black anodized Reel 3.8 g
DV-T268-101E for D3 pack, degreased Bulk 4.1 g
DA-T268-101E for D3 pack, black anodized Bulk 4.1 g
DV-T268-101E-TR for D3 pack, degreased Reel 4.1 g
DA-T268-101E-TR for D3 pack, black anodized Reel 4.1 g
DV-T263-201E for D or D2 pack, degreased Bulk
DA-T263-201E for D or D2 pack, black anodized Bulk
DV-T263-201E-TR for D or D2 pack, degreased Reel
DA-T263-201E-TR for D or D2 pack, black anodized Reel
DV-T268-301E for D3 pack, degreased Bulk
DA-T268-301E for D3 pack, black anodized Bulk
DV-T268-301E-TR for D3 pack, degreased Reel
DA-T268-301E-TR for D3 pack, black anodized Reel
DV-T263-301E for D2 pack, degreased Bulk
DA-T263-301E for D2 pack, black anodized Bulk
DV-T263-301E-TR for D2 pack, degreased Reel
DA-T263-301E-TR for D2 pack, black anodized Reel
Style 10 Style 20 Style 30
D0 1.55mm 1.5mm 1.5mm
K0 10.5mm 12.20mm 11.50mm
P0 4mm 4.0mm 4.0mm
P1 24mm 24mm 24.0mm
S0 40.4mm 40.4mm 52.4mm
W 44mm 44mm 56mm
K0P1P0
S0W
ø D0
0.81" (20.6mm)
0.03"
(0.80mm)
0.06"
(1.40mm)
0.54"
(13.7mm)
0.83" (21.1mm)
0.56"
(14.2mm)
0.63" (16.0mm)
TO-268 (D3)
0.076"
(1.94mm)
0.06"
(1.40mm)
0.54"
(13.7mm)
0.64" (16.3mm)
0.56"
(14.2mm)
0.44" (11.2mm)
TO-252 (D)
TO-263 (D2)
TO-263 (D2)
0.62" (15.8mm)
0.35" (8.89mm) TO-252 (D)
0.03"
(0.80mm) TO-263 (D2)
TO-252 (D)
D Series
Heatsink For TO-252, TO-263
and TO-268 devices
DA-T263-201E-TR
Series
D
Style
10, 20 or 30
Length
1 = 0.50"
2, 3, 4 = optional lengths
assigned
sequentially on
customer request
Finish
A = black anodized
V = degreased
Package
T263 = TO-263
(or TO-252)
T268 = TO-268
Tape & Reel
RoHS
Compliant
Removable Kapton
tape on each part
facilitates handling
by automatic pick
and place equipment.
Style 10 tape and
reel only.
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172
E Series Heatsinks
For TO-220 devices
For Ohmite Surface Thermal
Heatsink Package Resistor Area Resistance*
Part Number Type Series (in2) Weight (°C/W)
EV-T220-38E TO-220 TBH25, TCH35 11.5 0.63 oz/18g 11.4
EA-T220-38E 9.5
EV-T220-51E TO-220 TBH25, TCH35 15.2 0.85 oz/24g 9.0
EA-T220-51E 7.5
EV-T220-64E TO-220 TBH25, TCH35 18.8 1.06 oz/30g 7.4
EA-T220-64E 6.2
*Natural convection at 10W dissipation
Heat Dissipation
Heat sink Aluminum 6063-T5 or equiv-
alent with either black anod-
ized or degreased finish
Solder feet Tin plated brass
Interface
thermal
resistance
for improvement, use thermal
joint compound or 0.005
Grafoil (TGon 800 by Laird)
Interface
electrical
isolation
Sil-Pad 900S by Bergquist or
equivalent
Mounting Surf. Temp. Rise above Ambient (°C)
Heat Dissipated (watts)
80
40
0
2468
60
100
100
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
2
0
4
8
10
6002000 400 1000
20
6
Air Velocity (ft./min.)
800
-E51 -E51
-E38
-E38
-E64
-E64
FEATURES
•Verticalthrough-holePCBmounting
•0.142in.diametermountingholes(3)
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
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Land Pattern
Standard part numbers
Part Number Description Packaging
EV-T220-38E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-38E Heat sink for TO-220, black anodized Bulk
EV-T220-51E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-51E Heat sink for TO-220, black anodized Bulk
EV-T220-64E Heat sink for TO-220, no finish (degreased) Bulk
EA-T220-64E Heat sink for TO-220, black anodized Bulk
EV-T220-51E
Series
Package type
to be heatsinked
Height
(mm)
Finish
A = black anodized
V = degreased
RoHS Compliant
0.630"
(16.00mm ±.20)
0.50"
(12.70mm)
0.055"
(1.40mm)
0.689"
(17.50mm ±.15)
0.437"
(11.10mm ±.30)
1.00"
(25.40mm)
ø0.098"
(2.50mm)
1.378"
(35.00mm ±.20
)
0.196"
(5.0mm ±.20)
0.138"
(3.50mm +.20/-.10)
0.720"
(18.30mm ±.20)
1.00"
(25.40mm ±.20)
Height H
ø0.142"
(3.60mm +.10/-0)
0.500"
(12.70mm)
0.031"
(0.79mm)
ø 0.105"
(2.67mm)
Device
Center
Line
NOTICE: Dimensional
change. Dimensions shown
are for products produced
after July 2013
Height
Part Number (in. ±.010 / mm ±.25)
EV-T220-38E 1.5 / 38.10
EA-T220-38E
EV-T220-51E 2.0 / 50.80
EA-T220-51E
EV-T220-64E 2.5 / 63.50
EA-T220-64E
E Series Heatsinks
For TO-220 devices
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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174
F and R Series Heatsinks
For TO-218, TO-220 and TO-247 devices
Height Surface Thermal
Heatsink (in. ±.010 / Area Res.*
Part Number mm ±.25) For Package Type Ohmite Resistor Series (mm2) Weight (g) (°C/W)
RA-T2X-25E 1.0/25.4 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 8,901 25 4.8
RA-T2X-38E 1.5/38.1 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 12,983 38 3.9
RA-T2X-51E 2.0/50.8 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 17,065 51 3.5
RA-T2X-64E 2.5/63.5 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 21,148 63 3.1
FA-T220-25E 1.0 / 25.4 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 9,285 18 4.7
FA-T220-38E 1.5 / 38.1 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 13,756 27 3.8
FA-T220-51E 2.0 / 50.8 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 18,222 37 3.4
FA-T220-64E 2.5 / 63.5 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100 22,814 46 3
*Natural convection
Heat Dissipation
Finish Black anodized
Material 6063-T5 aluminum
Solder 100% Tin (Sn)
PC board attachement 0.091” dia. pre-tinned pins.
300100 200 600400 500 900700 800
50
Heat Dissipated (watts)
30
10
0
420 1086 16 181412
40
20
20
100
0 1000
Air Velocity (ft./min.)
H = 1"
H = 1.5"
H = 2"
H = 2.5"
60
90
70
80
2.5
1.5
0.5
0
2
1
5
3
4.5
3.5
4
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
Mounting Surface Temp. Rise
above Ambient (°C)
300100 200 600400 500 900700 800
50
Heat Dissipated (watts)
30
10
0
420 1086 16 181412
40
20
20
100
0 1000
Air Velocity (ft./min.)
H = 1"
H = 1.5"
H = 2"
H = 2.5"
60
90
70
80
2.5
1.5
0.5
0
2
1
5
3
4.5
3.5
4
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
Mounting Surface Temp. Rise
above Ambient (°C)
F SeriesR Series
FEATURES
•Forverticalmountingwithsolderablepins
•ForTO-220,TO-218,TO-247
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 175
1.638"
(41.6mm)
0.059"
(1.5mm)
ø0.14"
(3.6mm)
(no top hole on
FA-T220-25E)
1.000"
(25.4mm)
0.669"
(17.0mm
+0.2/-0)
0.437"
(11.1mm)
ø0.091"
(2.3mm)
0.98"
(25.0mm)
H ±0.56mm
0.720"
(18.3mm)
0.196"
(5.00mm)
0.138"
(3.5mm +.3/-.1)
1.000"
(25.4mm ±0.25)
Height
(in. ±.010 /
Part Number mm ±.25)
RA-T2X-25E 1.0/25.4
RA-T2X-38E 1.5/38.1
RA-T2X-51E 2.0/50.8
RA-T2X-64E 2.5/63.5
FA-T220-25E 1.0 / 25.4
FA-T220-38E 1.5 / 38.1
FA-T220-51E 2.0 / 50.8
FA-T220-64E 2.5 / 63.5
Standard part numbers
Part Number Description Packaging
RA-T2X-25E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-38E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-51E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-64E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-25E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-38E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-51E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-64E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-25E
Series
F or R
T2X = R Series
T220 = F Series
Height
(mm)
Finish
A = black anodized
V = degreased
RoHS Compliant
0.47"
(12.0mm)
ø0.14"
(3.6mm)
0.75"
(19.1mm)
0.98"
(25.0mm)
1.65"
(42.0mm)
H ±0.56mm
0.98"
(25.0mm)
1.000"
(25.4mm ±0.25)
ø0.091"
(2.3mm)
F SeriesR Series
NOTICE:
Dimensional
change.
Dimensions
shown are for
products pro-
duced after
September
2012
F and R Series Heatsinks
For TO-218, TO-220 and TO-247 devices
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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176
M Series Heatsinks
Heatsink with clips for TO-264 and TO-247
Thermal
Surface Area Weight Resistance
Part No. (in2/mm2) (oz./g) (°c/w)*
MV-102-55E 45 / 29,097 2.2 / 63 6.0
MA-102-55E 45 / 29,097 2.2 / 63 5.2
MV-101-27E 22 / 14,284 1.1 / 31 9.6
MA-101-27E 22 / 14,284 1.1 / 31 8.0
MV-302-55E 76 / 49,218 4.7 / 134 3.6
MA-302-55E 76 / 49,218 4.7 / 134 3.0
MV-301-27E 37.3 / 24,161 2.3 / 66 5.5
MA-301-27E 37.3 / 24,161 2.3 / 66 4.6
* R-thetac-a for 18W dissipation total for two devices in natural convection
FEATURES
•Minimumassemblycostandlabor.SpringClips
make the mounting holes and fasteners obsolete in
assemblyoperations&reducecosts.
•MaximumThermalTransfer.Maximumsurfacearea
perunitvolume,efficientcoolingfins&consistent
mounting force reduces thermal resistance
•MaximumRepeatability.Constantspringforceover
repeated assembly/disassembly
•MaximumReliability.Resilientspringactionlocks
electroniccomponentinplace.Fewerpartsin
assemblyandnofastenersandwashersrequired.
Prevent short circuit by eliminating metal particles
generated from hardware or thread tapping
•DesignFlexibility.Maximumflexibilityfordynamic
device locations and power up grading. “Configure-
to-Fit”&“Scale-to-Meet”optionsgivedesignersthe
total freedom to configure the heat sink to fit their
packaging designs and to scale the heat sink to
meet their power dissipations.
CHARACTERISTICS
Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized
finish.
Spring Clip Music Wire, Per ASTM A228 with bright nickel plating
Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS com-
pliant.
Interface thermal resistance Thermal joint compound or 0.005 Grafoil (TGon 800 by Laird)
Interface electrical isolation Sil-Pad 900S by Bergquist or equivalent
SERIES SPECIFICATIONS
Ohmite introduces the M series, patented (Pat. No.
7,151,669), high performance, low cost, configu-
rable, scalable and compact heat sink with matrix clip
system for TO-247 and TO-264 packages. This pow-
erful heat sink provides the easiest assembly, largest
surfaceareaandsmallestfootprint.Itistheideal
type of heat sink for high power density and small
size(1Uor2U)electronicpackagingwithforcedcon-
vection cooling.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 177
HEAT DISSIPATION
Fortwodevices
DIMENSIONS
Standard Part Numbers
Part Number Description Packaging
MV-102-55E 55mm No finish (degreased) Bulk
MA-102-55E 55mm Black anodized Bulk
MV-101-27E 27mm No finish (degreased) Bulk
MA-101-27E 27mm Black anodized Bulk
MV-302-55E 55mm No finish (degreased) Bulk
MA-302-55E 55mm Black anodized Bulk
MV-301-27E 27mm No finish (degreased) Bulk
MA-301-27E 27mm Black anodized Bulk
Case Temp. Rise above Ambient (°C)
Heat Dissipated, total for two devices (watts)
60
20
0
100
40
10 20 5030 400
140
80
120
Thermal Resistance from Case
to Ambient (°C/watts)
1
0
2
4
8004000 600 12001000
Air Velocity (ft./min.)
3
5
7
6
200
MA-101-27
MA-301-27
MA-102-55
MA-302-55
W
Z
V
Y
2.01" (51mm)
2.17" (55mm)
0.08"
(2.0mm)
X
C
LC
L
user defined values
ø 0.07"
(1.8mm) 4x
ø 0.10"
(2.5mm)
W
Z
V
0.90"
(22.9mm)
1.06" (27mm)
0.08"
(2.0mm)
X
C
L
user
defined
value
ø 0.07"
(1.8mm) 4x
ø 0.10"
(2.5mm
)
-55E -27E
-102-55E
0.84"
(21.3mm)
1.04" ±.025
(26.4mm)
1.71"
(43.5mm)
0.16"
(4.2mm)
2.20" (55.8mm)
-302-55E
-101-27E -301-27E
1.52"
(38.6mm)
1.34" (34.1mm)
0.83"
(21.1mm)
0.95" ±.025
(24.1mm)
0.14"
(3.6mm)
MV-102-55E
Series
No. of clips
Length
(mm)
Finish
A = black anodized
V = degreased
RoHS Compliant
Part Number W V Z*
MV-102-55E 1.35" / 34.3 0.95" / 24.1 0.18" / 4.6
MA-102-55E
MA-101-27E
MA-101-27E
MV-302-55E 2.20" / 55.9 1.04" / 26.4 0.21" / 5.3
MA-302-55E
MA-301-27E
MA-301-27E
*Device package
dimensions can
vary. Customer
should verify
this dimension.
M Series Heatsinks
Heatsink with clips for TO-264 and TO-247
HOW TO ORDER
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178
Surface Thermal
Heatsink Area Weight Resistance*
Part Number (in2/mm2) (oz/g) (°C/W)
R2V-CT2-38E 21 / 13,579 0.92 / 26 9.8
R2A-CT2-38E 21 / 13,579 0.92 / 26 8.6
R2V-CT4-38E 21 / 13,579 1.02 / 29 9.8
R2A-CT4-38E 21 / 13,579 1.02 / 29 8.6
R2V-CT6-38E 21 / 13,579 1.02 / 29 9.8
R2A-CT6-38E 21 / 13,579 1.02 / 29 8.6
*Free convection at 15W
Ohmite’s R2 Series (patent pending) heatsink pro-
vides a large surface area along with our C Series
clipping mechanism to attach to a TO-220, TO-247,
or TO-264 package. The self-aligning features of the
clip assure secure attachment and enhanced thermal
performance.Becausenoscrewsarerequiredfor
device mounting, additional fins can be added to the
rear side of the heatsink for increased total surface
area in a more compact space.
FEATURES
•Reduced Assembly Cost: C Series camming clips
make fasteners and fixtures obsolete, along with
stray metal filings from tapped holes.
•Maximum Repeatability: clamping force of the clip
is not degraded by repeated loading and unloading.
•Maximum Heat Transfer per Unit Space: maximum
surface area per unit volume and consistent mount-
ing force reduces thermal resistance
•Maximum Resistance to Shock and Vibration: light
weight, resilient clips lock the component in place
and are highly resistant to shock and vibration
•Maximum Reliability: helps prevent short circuits
by eliminating metal particles from thread tapping
•RoHS compliant
R2 Series
For TO-220, TO-247, and TO-264
CHARACTERISTICS
Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized
finish
Spring Clip Music Wire, Per ASTM A228 with bright nickel plating
Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS compli-
ant
Interface Thermal Resistance for improvement, use thermal joint compound, 0.005 Grafoil (TGon 800 by Laird),
or phase change material (Hi-Flow by Bergquist)
Insulator(Optional) Sil-Pad 900-S, K6 800-S and K10
SERIES SPECIFICATIONS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 179
HEAT DISSIPATION
R2 Series
For TO-220, TO-247, and TO-264
DIMENSIONS
HOW TO ORDER
TO-247 with no thermal
interface material
300100 200 600400 500 900700 800
Heat Dissipated (watts)
0
420 1086 16 181412
40
20
20
100
120
140
160
0 1000
Air Velocity (ft./min.)
60
80
2.5
1.5
0.5
0
2
1
3
3.5
Thermal Resistance
Case to Ambient (°C/W)
Case Temp Rise Above
Ambient in Free Air (°C)
ø0.05" typ.
(1.3mm)
2x ø0.08"
(2.0mm)
1.38"
(35.2mm)
0.80"
(20.3mm)
0.18"
(4.6mm)
0.87"
(22.0mm)
1.5"
(38.0mm)
0.14"
(3.6mm)
1.44"
(36.5mm)
0.39"
(10.0mm)
CT2: 0.55"
(14mm)
CT4: 0.71"
(18mm)
TO-247, -264: 0.69" (17.6mm)
TO-220: 0.47" (11.9mm)
TO-247, -264: 0.69" (17.6mm)
TO-220: 0.47" (11.9mm)
R2V-CT2-38E
Series
R2
Clip
C = camming clip
Height
(mm)
Finish
A = black anodized
V = degreased
Package
T2 = TO220
T4 = TO247
T6 = TO264
RoHS
Compliant
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180
W Series Heatsinks
For TO-220, TO-247, and TO-264 devices
Heatsink For Package Ohmite Resistor Surface Area Thermal
Part Number Type Series (in2) Weight Resistance*
WA-T220-101E TO-220 TBH25, TCH35 6.5 0.35 oz/10g Rs-a=12°C/W
WV-T220-101E Rs-a=13°C/W
WA-T247-101E TO-247 TEH70, TEH100 8.4 0.42 oz/12g Rs-a=11°C/W
WV-T247-101E Rs-a=12°C/W
WA-T264-101E TO-264 TFH85 8.4 0.42 oz/12g Rs-a=11°C/W
WV-T264-101E Rs-a=12°C/W
WA-DT2-101E TO-220 TBH25, TCH35, 15.1 0.79 oz/22g Rs-a=7°C/W
WV-DT2-101E & TO-247 TEH70, TEH100 Rs-a=8°C/W
*Natural convection at 10W heat dissipation
Heat Sink Aluminum alloy 6063-T5 or equivalent.
Spring Clip Music wire, per ASTM A228
Pin Solderable 100% tin over copper strike
Interface thermal
resistance
for improvement, use thermal joint com-
pound or 0.005 Grafoil (TGon 800 by
Laird)
Interface electrical
isolation
Sil-Pad 900S by Bergquist or equivalent
Mounting Vertical thru-hole mount
Clip Force 13.2 lbf.
T220-101E T247-101E
T264-101E
Patent
Pending
DT2-101E
Theuniquedesign(patentpending)oftheWSeries
heat sinks combines a tin plated, solderable, inte-
gral spring clip with an extruded aluminum heat
sink body for an all-in-one solution to through-hole
mounting of TO-220, TO-247, and TO-264 packages.
These self-aligning heat sinks feature solderable feet
and an integrated clip with 13.2 (lbf) of force on
the center of the device to enhance thermal perfor-
mance.
FEATURES
•ReducedAssemblyCost:springclipandauto-align
feature makes fasteners and fixtures obsolete,
along with stray metal filings from tapped holes
•MaximumRepeatability:clampingforceofthe
spring clip is not degraded by repeated loading and
unloading
•MaximumHeatTransferperUnitSpace:maximum
surface area per unit volume and consistent mount-
ing force reduces thermal resistance
•MaximumResistancetoShockandVibration:light
weight, resilient spring clip locks the component in
place and is highly resistant to shock and vibration
•MaximumReliability:helpspreventshortcircuits
by eliminating metal particles from thread tapping
•RoHSCompliant
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
W
For TO-220 and TO-247 devices
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0.63"
(16.0mm)
0.08"
(2.0mm)
0.18"
(4.6mm)
C
L
ø 0.050"
(1.3mm)
ø 0.080"
(2.0mm) 0.27"
(6.9mm)
0.06"
(1.5mm)
0.72"
(18.3mm)
0.92"
(23.4mm)
T220
T247
0.500"
(12.7mm)
0.92"
(23.4mm)
0.59"
(15.0mm)
0.785"
(19.4mm)
0.80"
(20.2mm)
T264 0.711"
(18.1mm)
0.711"
(18.1mm)
1.71" (43.4mm)
0.500"
(12.7mm)
0.63"
(16.0mm
)
0.08"
(2.0mm)
0.18"
(4.6mm)
C
L
ø 0.080"
(2.0mm)
0.28"
(16mm)
0.711"
(18.1mm)
ø 0.050" typ.
(1.3mm)
0.89" (22.6mm)
0.59"
(15mm)
0.785"
(19.4mm)
DT2
0.63"
(16.0mm)
0.72" (18.3mm)
0.91" (23.1mm)
0.14" REF*
(3.6mm)
0.50" (12.7mm)
0.71" (18.0mm) Pin diameter
0.06" (1.5mm)
T220
T247, T264
T220
T247, T264
1.20"
(30.5mm
±0.3)
1.26"
(32.0mm
±0.3)
*Meets
IPC-610
Through-hole
Soldering
Requirement
Land pattern
Standard part numbers
Part Number Description Packaging
WA-T220-101E Heat sink for TO-220, black anodized Bulk
WV-T220-101E Heat sink for TO-220, no finish (degreased) Bulk
WA-T247-101E Heat sink for TO-247, black anodized Bulk
WV-T247-101E Heat sink for TO-247, no finish (degreased) Bulk
WA-T264-101E Heat sink for TO-264, black anodized Bulk
WV-T264-101E Heat sink for TO-264, no finish (degreased) Bulk
WA-DT2-101E Heat sink for TO-247 &TO-220, black anodized Bulk
WV-DT2-101E Heat sink for TO-247 &TO-220, no finish (degreased) Bulk
Mounting Surface Temp. Rise
above Ambient (°C)
Heat Dissipated (watts)
150
50
0
0124
200
100
2816 20
Free
Air
250
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
14
6
2
0
8
4
10
12
800400200 600 1000
Air Velocity (ft./min.)
Air Flow
along Fins
Air Flow
Side to Side
T220-101E
T247-101E,
T264-101E
Heat Dissipation
T220-101E, T247-101E and T264-101E
100
Mounting Surface Temp. Rise
above Ambient (ϒC)
Heat Dissipated (watts)
60
20
0
0124
80
40
2816 20
Free
Air
140
Thermal Resistance from Mounting
Surface to Ambient (ϒC/watts)
6
2
0
8
4
10
12
800400200 600 1000
Air Velocity (ft./min.)
Air Flow
along Fins
Air Flow
Side to Side
120
DT2-101E
100
CHARACTERISTICS
W Series Heatsinks
For TO-220, TO-247, and TO-264 devices
DT2-101E
DIMENSIONS
(in./mm ±0.3mm)
ORDERING INFORMATION
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182
AH Series
Extrusion Heatsinks
FEATURES
•Manyotherextrusionprofilesavailable.
ContactOhmitewithyourrequirements
•Multiplefinishesavailable
•Modificationsavailable:screwholes,bolt
patterns, milling per customer specifications
SERIES SPECIFICATIONS
Width Height Base Thickness Weight Rq Surface area
Part (in. - mm) (in. - mm) (in. - mm) (lb./ft. - kg/m) (°C/W) (in.2/in. - mm2/mm)
AH33000 0.75 / 19.05 0.6 / 15.24 0.09 / 2.29 0.278 / 0.413 8 9.633 / 244.68
AH54100 0.94 / 23.88 0.41 / 10.41 0.06 / 1.52 0.262 / 0.389 6.2 11.49 / 291.85
AH80126 1.095 / 27.81 1.15 / 29.21 0.2 / 5.08 0.6 / 0.891 7.1 9.881 / 250.98
AH17500 1.5 / 38.10 0.44 / 11.18 0.09 / 2.29 0.42 / 0.624 4.8 26.539 / 674.09
AH10564 1.875 / 47.63 1 / 25.40 0.188 / 4.78 1.049 / 1.558 2.3 16.174 / 410.82
AH10551 1.92 / 48.77 1.25 / 31.75 0.25 / 6.35 1.08 / 1.604 3.8 18.005 / 457.33
AH40000 2.1 / 53.34 1 / 25.40 0.12 / 3.05 1.184 / 1.758 3.7 22.576 / 573.43
AH29300 2.28 / 57.91 0.38 / 9.65 0.06 / 1.52 0.466 / 0.692 3.6 14.274 / 362.56
AH10719 2.312 / 58.72 1.5 / 38.10 0.156 / 3.96 1.327 / 1.971 3 23.288 / 591.52
AH67200 2.892 / 73.46 1.062 / 26.97 0.306 / 7.77 1.855 / 2.755 3.1 22.315 / 566.80
AH48600 3 / 76.20 2.25 / 57.15 0.28 / 7.11 2.968 / 4.407 1.8 47.494 / 1,206.35
AH64100 3.12 / 79.25 1.25 / 31.75 0.312 / 7.92 2.125 / 3.156 2.7 24.613 / 625.17
AH80015 3.356 / 85.24 3.136 / 79.65 0.216 / 5.49 3.326 / 4.939 0.9 64.702 / 1,643.43
AH80000 3.5 / 88.90 0.85 / 21.59 0.2 / 5.08 1.432 / 2.127 2.2 24.973 / 634.31
AH12153 3.6 / 91.44 1.15 / 29.21 0.22 / 5.59 2.23 / 3.312 1.9 32.46 / 824.48
AH11600 3.682 / 93.52 0.774 / 19.66 0.1 / 2.54 1.18 / 1.752 2.2 26.8 / 680.72
AH16000 3.79 / 96.27 2 / 50.80 0.2 / 5.08 2.66 / 3.950 1.8 39.631 / 1,006.63
AH50600 3.924 / 99.67 1.21 / 30.73 0.215 / 5.46 2.34 / 3.475 1.7 33.27 / 845.06
AH12310 4.125 / 104.78 1.75 / 44.45 0.25 / 6.35 3.49 / 5.183 1.3 38.75 / 984.25
AH11958 4.4 / 111.76 1.32 / 33.53 0.22 / 5.59 2.846 / 4.226 1.6 42.936 / 1,090.57
AH32530 4.5 / 114.30 1.4 / 35.56 0.2 / 5.08 2.382 / 3.537 1.7 36.973 / 939.11
AH73900 4.527 / 114.99 0.733 / 18.62 0.149 / 3.78 1.692 / 2.513 1.6 49.614 / 1,260.20
AH13184 4.75 / 120.65 1.25 / 31.75 0.125 / 3.18 1.418 / 2.106 2 31.182 / 792.02
AH80125 4.8 / 121.92 2.22 / 56.39 0.22 / 5.59 3.947 / 5.861 1.4 64.95 / 1,649.73
AH14315 4.997 / 126.92 1.75 / 44.45 0.25 / 6.35 4.044 / 6.005 1.3 44.286 / 1,124.86
AH12700 5 / 127.00 0.49 / 12.45 0.12 / 3.05 1.4 / 2.079 2.4 29.3 / 744.22
AH80167 5 / 127.00 1.75 / 44.45 0.25 / 6.35 3.093 / 4.593 1.3 54.713 / 1,389.71
AH12118 5.5 / 139.70 2 / 50.80 0.25 / 6.35 4.11 / 6.103 1.2 55.664 / 1,413.87
AH13070 6.08 / 154.43 1.75 / 44.45 0.25 / 6.35 4.088 / 6.071 1.2 50.258 / 1,276.55
AH10578 6.5 / 165.10 1.6 / 40.64 0.2 / 5.08 3.558 / 5.284 1.3 54.414 / 1,382.12
AH61409 7.2 / 182.88 2.39 / 60.71 0.27 / 6.86 4.678 / 6.947 0.8 78.198 / 1,986.23
AH11945 7.34 / 186.44 1.312 / 33.32 0.312 / 7.92 5.042 / 7.487 1.1 61.861 / 1,571.27
AH10928 9.75 / 247.65 2.28 / 57.91 0.28 / 7.11 6.878 / 10.214 0.6 101.705 / 2,583.31
AH62430 12.25 / 311.15 2.3 / 58.42 0.3 / 7.62 10.3 / 15.296 0.6 96.972 / 2,463.09
CHARACTERISTICS
Rθ (°C/W) The thermal resistance is based on a 76 mm (3 inch) extrusion length in natural con-
vection, black anodized finish, and 75°C mounting surface temperature rise.
Material Aluminum alloy 6063-T5 (continued)
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AH Series
Extrusion Heatsinks
HOW TO ORDERADDITIONAL DIMENSIONS
EXTRUSION PROFILES
Not to scale. See chart for dimensions.
AH80126A12300NE
Series Finish
A = black anodized
C = gold chromate
F = clear chromate
G = green anodized
K = clear anodized
R = red anodized
V = unfinished, degreased
Extrusion
Style
Length
(in.)
to three
decimals
12300 = 12.3"
Modification
N = none
X = consult
factory for
options
RoHS Compliant
AH54100AH33000 AH80126 AH10551AH17500 AH29300
AH10564 AH10719
AH40000
AH11600
AH73900
AH64100
AH80167
AH67200
AH12153
AH80000
AH11958
AH50600
AH80015
AH32530
AH12310
AH12700
AH80125
AH12118
AH13184
AH14315
AH16000
AH61409
AH13070
AH10578 AH10928
AH11945
AH62430
AH48600
Not to scale.
AH13184
4.750"
1.335"
1.125"
0.125"
0.400" AH61409
0.270"
2.390"
7.200"
5.200"
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184
S Series
LED Heatsinks
Heatsink Height Surface area Weight Thermal resistance (°C/W)
Part Number (in/mm) (in2/mm2) (oz/g) Free conv. Forced conv.
SV-LED-113E 0.50 / 12.7 18 / 11,739 0.077 / 35 6.67 4.33
SA-LED-113E 5.33
SV-LED-125E 1.00 / 25.4 36 / 23,478 0.154 / 70 5.33 2.88
SA-LED-125E 4.27
SV-LED-151E 2.00 / 50.8 72 / 46,956 0.308 / 140 4.00 1.89
SA-LED-151E 3.20
SV-LED-176E 3.00 / 76.2 108 / 70,434 0.462 / 210 3.11 1.55
SA-LED-176E 2.49
Heat Dissipation
Heat Sink Aluminum Alloy 6063-T5
or Equivalent with either
degreased or black anodized
finish.
Mounting
Hardware
1/4, #10, and #4 thread form-
ing SS screws are preferred
Compliance Either degreased or black
anodized finished parts are
RoHS compliant.
OhmiteSSeriesLEDHeatsinksarelowcostandeasyassem-
blyheatsinksfor“Star”LEDpackagessuppliedbyCree,
Lumileds,Osramandothers.Thissimpleheatsinkcanhold
LEDmodulesandcanbemountedsimplywithsomethread
forming screws. The heat sink has two types of surface finish
and can be used in either natural (free) or forced convection
cooling applications.
Mounting Surf. Temp. Rise above Ambient (°C)
Heat Dissipated (watts)
80
40
0
36912
60
150
100
Thermal Resistance from Mounting
Surface to Ambient (°C/watts)
1
0
2
4
5
6002000 400 1000
20
3
Air Velocity (ft./min.)
800
113
125
151
176
113
125
151
176
CHARACTERISTICS
SERIES SPECIFICATIONS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 185
#1/4 screw (4)
#4 screw (6)
#10 screw (6)
Ø 2.75" (69.8mm)
Ø 2.5" (63.5mm)
H
Ø 1.00" (25.4mm)
Ø 0.75" (19.0mm)
Height H Surface area Weight
Part Number (in/mm) (in2/mm2) (oz/g)
SV-LED-113E 0.50 / 12.7 18 / 11,739 0.077 / 35
SA-LED-113E
SV-LED-125E 1.00 / 25.4 36 / 23,478 0.154 / 70
SA-LED-125E
SV-LED-151E 2.00 / 50.8 72 / 46,956 0.308 / 140
SA-LED-151E
SV-LED-176E 3.00 / 76.2 108 / 70,434 0.462 / 210
SA-LED-176E
SV-LED-113E
Series HeightCoating
A = black anodized
V = degreased
RoHS Compliant
Standard part numbers
Part Number Description Packaging
SV-LED-113E 12.7mm, no finish (degreased) Bulk
SA-LED-113E Black Anodized, 12.7mm Bulk
SV-LED-125E 25.4mm, no finish (degreased) Bulk
SA-LED-125E Black Anodized, 25.4mm Bulk
SV-LED-151E 50.8mm, no finish (degreased) Bulk
SA-LED-151E Black Anodized, 50.8mm Bulk
SV-LED-176E 76.2mm, no finish (degreased) Bulk
SA-LED-176E Black Anodized, 76.2mm Bulk
S Series
LED Heatsinks
DIMENSIONS
(in./mm)
ORDERING INFORMATION
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186
Surface Thermal
Heatsink Area Weight Resistance Height H
Part Number (in2/mm2) (oz/g) (°C/W) (in./mm)
SV-LED-314E 5.3 / 3,419 0.23 / 6.5 9.0 0.55/14
SV-LED-325E 9.5 / 6,129 0.41/11.6 5.6 0.98/25
OhmiteintroducestheSV-LEDSeries,highperfor-
mance, low cost, configurable, scalable and compact
powerheatsinkforLEDmodules.Thispowerful,high
aspectratioheatsinkcomesintwostandardheights.It
can be configured to customer specifications for length,
surface finish, mounting holes, and custom machining.
SV-LED Series
Heatsinks For Power LED Modules
SERIES SPECIFICATIONS
CUSTOMIZED VERSION
WithmountingholesandmilledsurfaceSV-LED-214E
DIMENSIONS
ø 0.85"
(21.6mm)
ø 0.39"
(9.9mm)
0.83"
(21.1mm)
H
Standard part numbers for SV-LED heatsinks
Part Number Description Packaging
SV-LED-314E Heatsink, degreased, 14mm height Bulk
SV-LED-325E Heatsink degreased, 25mm height Bulk
HOW TO ORDER
0.560"
(14.2mm)
0.562"
(14.3mm)
0.313"
(7.95mm)
2-56 UNC
2x
2-56 UNC
cavity opp. face
0.625" dia. (15.9mm)
0.110"depth (2.8mm)
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Rheostats
(Potentiometers) Wirewound
D
0.25"
6.35 mm
enclosed
unenclosed
standard
shaft
0.125"
3.18 mm
0.625"
15.88 mm
B
0.25"
6.35 mm
0.078"
1.98 mm
C
0.531"
13.49 mm
0.406"
10.32 mm
shaft
locking
nut
0.094"
2.38 mm
B
D
locking
shaft
Max.
Ohmic Voltage Behind panel “B" Diameter “D" Dimension “C" Shaft Rotation
Model Type Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) (in./mm Ref.) torque (±5°)
C RCS/RCL 7.5 10.0-5K enclosed 305 0.875/22.23 0.515/ 13.08 — 0.25-3 oz. in. 300°
• See Catalog #203 for complete details.
Max.
Ohmic Voltage Behind panel “B" Diameter “D" Dimension “C" Shaft Rotation
Model Type Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) (in./mm Ref.) torque (±5°)
E RES/REL 12.5 1.0-15K open 305 0.688/17.46 0.875/ 22.23 0.594/15.08 1-6 oz. in. 300°
E REE 12.5 1.0-15K enclosed 305 1.219/30.96 1.047/ 26.59 — 1-6 oz. in. 300°
• See Catalog #203 for complete details.
D
0.25"
6.4 mm
0.125"
3.18 mm
0.625"
15.88 mm
0.625"
15.88 mm
B
0.25"
6.4 mm
0.109"
2.78 mm
0.531"
13.49 mm
0.25"
6.4 mm
Standard
shaft
Locking
shaft
Mounting: Panels to
0.125" (3.18mm) thick
with 1
/4-32 bushing and
hex nut (1
/16" thick).
Mounting: Panels
to 0.125" (3.18mm)
thick with 1
/4-32
bushing and hex
nut (1
/16" thick).
MODEL C
MODEL E
Dimensions for reference only; consult factory for details.
Since all rheostats/potentiometers are electro-mechanical devices, they are subject to mechanical wear and, therefore, have a finite life.
Models H, J, K, L and N are listed under UL File No. E-10946 and CSA File No. 21309 unless noted otherwise.
All rheostats are 10% tolerance.
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188
Mounting: Panels to
0.25" (6.35mm) thick
with 3
/8-32 bushing and
hex nut
(3
/32" thick) (or with 10-32
x 0.75 flat-head screws
for model L only).
0.5"
12.7 mm
holes for:
no. 2 screws (model H)
no. 8 screws (J, G, K, L) mounting
bracket on
model L only
1.75"
44.5 mm
D
0.25"
6.35 mm
0.031"
0.79 mm
0.344"
8.73 mm
0.031"
0.79 mm
0.063"
1.59 mm
0.375"
9.53 mm
0.875"
22.23 mm B
C
0.75"
19.05 mm
bushing
projection
0.625"
15.88 mm
shaft
locking
nut
standard shaft
(models H, J, G, K, L)
locking shaft
(only model H
stocked)
drill 0.188" (4.76 mm)
hole in panel.
washer not included
in model L
Rheostats
(Potentiometers) Wirewound
MODELS H, J, G, K, L
MODELS P, N, R, U
Max.
Ohmic Voltage Behind panel “B" Diameter “D" Dimension “C" Shaft Rotation
Model Type Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) (in./mm Ref.) torque (±5°)
H RHS/RHL 25 1.0-25K open 500 1.375/34.93 1.560/ 39.62 0.940/23.88 0.25-0.5 lb. in. 300°
J RJS 50 0.5-50K open 750 1.375/34.93 2.31 / 58.67 1.56 /39.62 0.25-2 lb. in. 300°
G RGS 75 0.5-50K open 900 1.750/44.45 2.75 / 69.25 1.78 /45.21 0.5-2 lb. in. 300°
K RKS 100 0.5-50K open 1000 1.750/44.45 3.125/ 79.38 1.91 /48.51 0.5-2 lb. in. 300°
L RLS 150 0.5-50K open 1200 2.000 / 50.8 4.00 /101.60 2.28 /57.91 0.5-3 lb. in. 300°
• Models H, J, G, and K also available in enclosed versions.
• See Catalog #203 for complete details.
0.375"
9.53 mm
D
M M
1/
4 - 20 thread for
mounting screws
0.031"
0.79 mm
2"
51 mm
B
1.563"
39.7 mm
C
holes for
no. 8 screws
Dimension “M"
P 0.875" 22.23 mm
N 1.188" 30.16 mm
R 1.5" 38.1 mm
U 3" 76.2 mm
Mounting: Panels
to 1.25" (31.75mm)
thick with 1
/4-20
flat-head screws.
Max.
Ohmic Voltage Behind panel “B" Diameter “D" Dimension “C" Shaft Rotation
Model Type Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) (in./mm Ref.) torque (±5°)
P RPS 225 1.0-30K open 1300 2.125/53.98 5.00 /127.00 2.97 /75.44 2.5-4 lb. in. 310°
N RNS 300 1.0-50K open 1225 2.375/60.33 6.00 /152.40 3.44 /87.38 2.5-5 lb. in. 320°
R RRS 500 1.0-20K open 1450 2.125/53.98 8.00 /203.20 4.31/109.47 4.5-7 lb. in. 325°
U RUS 1000 1.0-20K open 1600 3.000 / 76.2 12.00 /304.80 6.38/162.05 3.5-7 lb. in. 335°
• See Catalog #203 for complete details.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 189
=Standardvalues;checkavailability
Rheostats are silicone-ceramic coated at and
abovethefollowingohmicvalues:
ModelC:all ModelG:5000Ω
ModelE:750Ω ModelK:5000Ω
ModelH:2000Ω ModelL:7500Ω
ModelJ:5000Ω
0.5 –––R50 10.0 12.3 14.1 17.3
1 –––1R0 3.53 5.00 7.07 8.66 10 12.3 15.0 17.32 22.3 31.6
1.5 –––1R5 18.2 25.8
2 –––2R0 2.50 3.54 5.00 6.12 7.07 8.65 10.6 12.24 15.8 22.4
2.5 –––2R5 2.24 14.1 20.0
3 –––3R0 2.04 2.88 5.00 5.75 7.07 8.66 10.00 12.9 18.3
4 –––4R0 3.53 7.50 8.66 11.2 15.8
5 –––5R0 1.58 3.88 4.47 5.48 6.71 7.75 10.0 14.1
6 –––6R0 1.44 2.04 2.88
7.5 –––7R5 3.16 3.65 4.47 5.49 6.32
8 –––8R0 1.25 1.77 2.50 7.90 11.2
10 –––10R 0.86 1.12 1.58 2.74 3.16 3.88 4.74 5.48 10.0
12 –––12R 2.04
12.5 –––12R5 6.30 8.95
15 –––15R 0.71 0.91 1.29 3.163 3.87 4.47
16 –––16R 1.76 2.17 2.50 5.60 7.90
22 –––22R 1.50
25 –––25R 0.55 0.71 1.00 1.73 2.0 2.450 3.00 3.46 4.47 6.33
35 –––35R 0.46 0.60 0.845 1.19 2.070
40 –––40R 3.54
50 –––50R 0.39 0.50 0.707 1.00 1.23 1.41 1.735 2.12 2.45 3.16 4.47
75 –––75R 0.32 0.40 0.575 1.00 1.15 1.415 1.73 2.00 3.65
80 –––80R 0.790 2.52
100 –––100 0.27 0.36 0.500 0.866 1.00 1.225 1.50 1.73 3.16
125 –––125 0.32 0.445 0.630 2.00
150 –––150 0.22 0.29 0.575 1.000 1.22 1.41
160 –––160
175 –––175 0.27 0.375 1.69 2.39
200 –––200 0.19 0.25 0.612 0.707 0.865 1.06 1.22
225 –––225 0.470 2.11
250 –––250 0.17 0.22 0.316 0.775 1.41
300 –––300 0.408 0.500 0.575 0.866 1.00 1.83
325 –––325 1.24
350 –––350 0.15 0.19 0.267 0.655
400 –––400 0.433 0.500 0.750 0.866 1.48
500 –––500 0.12 0.16 0.222 0.316 0.388 0.447 0.548 1.00 1.41
600 –––600
700 –––700 0.567 0.655
750 –––750 0.10 0.13 0.182 0.316 0.365 0.447 0.817 1.15
800 –––800 0.250
900 –––900 0.500 0.578
1000 –––1K0 0.086 0.10 0.155 0.224 0.274 0.316 0.707 1.00
1200 –––1K2 0.433 0.500
1250 –––1K25 0.346
1500 –––1K5 0.071 0.090 0.129 0.224 0.258 0.387 0.447 0.577 0.816
1600 –––1K6 0.176
1750 –––1K75 0.358 0.414
1800 –––1K8 0.288
2000 –––2K0 0.194 0.224 0.336 0.387 0.500
2250 –––2K25 0.259
2500 –––2K5 0.055 0.070 0.100 0.141 0.173 0.200 0.300 0.346 0.447 0.633
3000 –––3K0 0.224
3500 –––3K5 0.046 0.060 0.084 0.119
4500 –––4K5 0.182
5000 –––5K0 0.039 0.050 0.070 0.100 0.123 0.141
7500 –––7K5 0.041 0.058 0.100 0.115 0.141
8000 –––8K0 0.079
10000 –––10K 0.035 0.050 0.070 0.087 0.100 0.122
12500 –––12K5 0.031
15000 –––15K 0.029 0.041 0.058
20000 –––20K 0.035 0.050
25000 –––25K 0.032 0.045
30000 –––30K 0.041
40000 –––40K 0.035
50000 –––50K 0.032
Ohmic value
RCS––– Std. shaft
7.5W Model C
Part No.
Prefix
Suffix
RCL––– Locking
Amps max.
REL––– Locking
12.5W Model E
REE––– Enclosed
Amps max.
RES––– Std. shaft
RHS––– Std. shaft
25W Model H
RHL––– Locking
Amps max.
RJS–––
Amps max.
RGS–––
Amps max.
RKS–––
Amps max.
RLS–––
Amps max.
RPS–––
Amps max.
RNS–––
Amps max.
RRS–––
Amps max.
RUS–––
Amps max.
50W
Model J
75W
Model G
100W
Model K
150W
Model L
225W
Model P
300W
Model N
500W
Model R
1000W
Model U
Rheostats
(Potentiometers) Wirewound
ORDERING INFORMATION
• RoHS compliant product available. Add
“E" suffix to part number to specify.
• Made-to-order rheostats available:
Contact nearest Ohmite sales office.
* Voltage rating dependent on resistance
value.
Series
Rheostats
Wirewound
Potentiometers
Resistance Value*
Example:
R50=0.50Ω
1R0=1Ω
7R5=7.5Ω
250 = 250Ω
1K0=1,000Ω
1K75 = 1,750Ω
4K5=4,500Ω
50K = 50,000Ω
RCSR50E
Code Watts ModelShaft Core
CL= 7.5 C Locking Enclosed
CS= 7.5 CStandard Enclosed
EE = 12.5 E Standard Enclosed
EL = 12.5 E Locking Open
ES = 12.5 EStandard Open
GS =75GStandard Open
HL =25HLocking Open
HS =25HStandard Open
JS =50JStandard Open
KS = 100 KStandard Open
LS = 150 LStandard Open
NS = 300 NStandard Open
PS = 225 PStandard Open
RS = 500 RStandard Open
US = 1000 UStandard Open
E = RoHS compliant
*Check table for standard resistance
values and maximum current values
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190
CHARACTERISTICS
SERIES SPECIFICATIONS
Potentiometers
Molded composition
Ohmic Behind panel Diameter Voltage
Model Watts range (in./mm) (in./mm) Rotation (RMS)
AS 0.5 50-5M 0.703/17.9 0.50/12.7 295° ±5° 350
ASM 0.5 50-5M 0.703/17.9 0.50/12.7 295° ±5° 350
CA 2.0 50-5M 0.625/15.9 1.16/29.4 312° ±3° 500
CB 2.0 50-5M 0.625/15.9 1.16/29.4 312° ±3° 500
CU 2.0 50-5M 0.625/15.9 1.16/29.4 312° ±3° 500
CCU 2.0 50-5M 1.266/32.1 1.16/29.4 312° ±3° 500
CLU 2.0 50-5M 0.625/15.9 1.16/29.4 312° ±3° 500
CMU 2.0 50-5M 0.625/15.9 1.16/29.4 312° ±3° 500
FEATURES
•Lownoise,smooth
operation
•Inaccordancewith“Mil”
RV4N,RV4L,RV6L,
RV6N,2RV7Ntypes
•RoHScompliant;non-
RoHSversionunavail-
able.
Ohmite molded composi-
tion potentiometers are
available in various models
for applications in military
devices,industrialequip-
mentandinequipment
requiringaconvenient
resistance control device.
Derating linear from 100% at +70°C to 0% at
+120°C
Operating temp. range -55°C to 120°C
Construction Elements molded into a single, integral
structure. Metal cover protects and
shields the internal parts.
Sealing synthetic resin containing non-mercurial
fungicide
Product life Since all rheostats/potentiometers are
electro-mechanical devices, they are
subject to mechanical wear and, there-
fore, have a finite life.
(continued)
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DIMENSIONS
(iin./mm)
ORDERING INFORMATION
=Standardvalues;checkavailability
*add“-E”forRoHS-compliantlead-freezinc-nickelplatedproduct
50 –––500A –––5001
100 –––101A –––1011 AS3601E ASM6661E
150 –––151A –––1511
250 –––251A –––2511 AS3602E ASM6662E
350 –––351A –––3511
500 –––501A –––5011 AS3603E ASM6663E
750 –––751A –––7511
1,000 –––102A –––1021 AS3604E ASM6664E
1,500 –––152A –––1521
2,500 –––252A –––2521 AS3605E ASM6665E
3,500 –––352A –––3521
5,000 –––502A –––5021 AS3606E ASM6666E
7,500 –––752A –––7521
10,000 –––103A –––1031 AS3607E ASM6667E
15,000 –––153A –––1531
25,000 –––253A –––2531 AS3608E ASM6668E
35,000 –––353A –––3531
50,000 –––503A –––5031 AS3609E ASM6669E
75,000 –––753A –––7531
100,000 –––104A –––1041 AS3610E ASM6670E
150,000 –––154A –––1541
250,000 –––254A –––2541 AS3611E ASM6671E
350,000 –––354A –––3541
500,000 –––504A –––5041 AS3612E ASM6672E
750,000 –––754B –––7542
1,000,000 –––105B –––1052 AS3613E ASM6673E
1,500,000 –––155B –––1552
2,000,000 –––205B –––2052 AS3684E ASM6674E
2,500,000 –––255B –––2552 AS3614E ASM6675E
3,500,000 –––355B –––3552
5,000,000 –––505B –––5052 AS3615E ASM6676E
Ohmic value
Part No.
Prefix
Suffix
CMU––– RV4NAYSD––– Linear
MIL Designation
Prefix
Suffix
CU––– RV4NAYSJ––– Linear
CA––– RV4NAYSJ––– CW log
CB––– RV4NAYSJ––– CCW log
CLU––– RV4LAYSA––– Linear
CCU––– 2RV7NYSJ––– Linear
Dual*
RV6LAYSA––– Linear
RV6NAYSD––– Linear
Ohmic value
Part No.
Prefix
Suffix
CMU––– RV4NAYSD––– Linear
MIL Designation
Prefix
Suffix
CU––– RV4NAYSJ––– Linear
CA––– RV4NAYSJ––– CW log
CB––– RV4NAYSJ––– CCW log
CLU––– RV4LAYSA––– Linear
CCU––– 2RV7NYSJ––– Linear
Dual*
RV6LAYSA––– Linear
RV6NAYSD––– Linear
Style CU, CA,
CB, CCU, CMU Style CLU
Style AS Style ASM
Type AB
Type AS
0.625"
15.9mm
(max.)
2"/
50.8mm
(CU, CA,
CB, CCU)
0.875"/
22.2 mm
(CMU)
1.266"
32.1mm
(max.)
(CCU)
0.375-32 thread,
round shaft,
0.25"/
6.35mm
panel (max.)
0.25"
6.35 mm
0.125"
3.18mm
1.16"
29.4mm
0.625"
15.88mm
lock nut,
slotted bushing,
locking shaft,
0.125"/
3.18mm
panel (max.)
0.5"
12.7mm
0.25-32 bushing,
locking type,
mounting nut &
lock nut
0.25-32 bushing,
standard type
0.703"
17.9mm
(max.)
0.625" ±.016
15.9mm
0.234"
6.0mm
(max.)
0.5"
12.7mm
0.469"
11.9mm
(max.)
0.5"
12.7mm
(max.)
0.125"
3.18mm
0.875" ±.016
22.2mm
0.25"
6.4mm
Model Watts Behind panel Diameter Rotation
AS 0.5 0.703/17.9 0.50/12.7 295° ±5°
ASM 0.5 0.703/17.9 0.50/12.7 295° ±5°
CA 2.0 0.625/15.9 1.16/29.4 312° ±3°
CB 2.0 0.625/15.9 1.16/29.4 312° ±3°
CU 2.0 0.625/15.9 1.16/29.4 312° ±3°
CCU 2.0 1.266/32.1 1.16/29.4 312° ±3°
CLU 2.0 0.625/15.9 1.16/29.4 312° ±3°
CMU 2.0 0.625/15.9 1.16/29.4 312° ±3°
Potentiometers
Molded composition
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
192
Rheostat and
Tap Switch Hardware
Knobs, Dials, Mounting Fasteners
Part No. Front mount models Rear mount models Max. panel thickness
6532 H, J H, J, G, K, L 5/32"
6533 G, K, L H, J, G, K, L 1/8"
6591 E E 1/16"
Ohmite coupling kits permit tandem mounting of two
rheostat units. A coupling fastens to the shaft of the back
unit;projectionsonthecouplingengagetherecessesin
the driving hub of the front unit.
Eachkitconsistsofasteel“U”frame,acouplingwith
set screw, mica washer, allen wrench and instructions.
Any knob can be used with any rheo-
stat and tap switch model which has
the corresponding shaft diameter.
Knobsarefastenedtoshaftswithslot-
ted set screws.
Slotted Hex socket Knob Hole Fits
set screw set socket Description dia. dia. model
5102 — Bar knob, 21/4" long — 1/4" H, J, G, K, L
5103 5103A Bar knob, 11/4" long — 1/4" H, J, G, K, L
5104 5104A Handwheel with pointer 31/4" 3/8" P, N, R, U
5105 — Handwheel without pointer 31/4" 3/8" P, N, R, U
5106 5106A Handwheel with pointer 31/4" 1/4" H, J, G, K, L
5107 — Handwheel without pointer 31/4" 1/4" H, J, G, K, L
5109 5109A Finger-grip with pointer 15/8" 1/4" H, J, G, K, L
5110 5110A Finger-grip without pointer 15/8" 1/4" H, J, G, K, L
5111 5111A Finger-grip with pointer 23/8" 1/4" H, J, G, K, L
5112 5112A Finger-grip without pointer 23/8" 1/4" H, J, G, K, L
5150 5150A Finger-grip 11/2" 1/4" H, J, G, K, L
5151 — Finger-grip 3/4" 1/8" C, E
— 5152A Like 5104 (shorter pointer) 31/4" 1/4" H, J, G, K, L
KNOBS
RHEOSTAT TANDEM COUPLING KITS
Finger grip
with pointer
Finger grip
without pointer
Handwheel
with pointer
Handwheel
without pointer
Finger grip
=Standardvalues
=Non-standardvaluessubjecttominimumhandlingchargeperitem (continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 193
DIALS
RHEOSTAT REPAIR KITS
EXTRA MOUNTING HARDWARE
Rheostat and
Tap Switch Hardware
Knobs, Dials, Mounting Fasteners
Kitcontains25each,nutsandlock
washers for panel mounting units.
Part No. For model
7090 E
7091 H, J, G, K, L, 111, 212, 711
Rheostat
Part No. model
7070 P
7071 N
7072 R
7074 U
Electrical contact replacement
kit.Kitincludescontact/slipring
assemblies (for round and ribbon
wire rheostats), copper graph-
ite washer, spring arm and hub.
Instructionsincluded.
=Standardvalues
=Non-standardvaluessubjecttominimumhandlingchargeperitem
Handsomelyfinished,black-enameled,aluminumdials
forOhmiterheostatsandtapswitches.Figuresand
lines are etched on a black background for contrast
and ease of readability. On rheostat dials, divisions
indicating approximate percentage of rheostat resis-
tance in circuit are marked from 0 to 100. On tap
switch dials, Number of dial positions are identical
with number of switch positions.
Part No. For model For knob Dial dia.
5007 C, E 5151 11/4”
5000 H, J, G, K, L 5150, 5116, 5103 23/16”
5001 P, N, R, U 5104, 5106 51/2”
5002-* 111, 212 (single), 312 (single) 5109, 5116, 5150 23/4”
5003-* 212 (tandem), 312 (tandem), 412 5111, 5152A 33/4”
5004-* 608 5104 51/2”
* Specify number of positions as suffix.
For
rheostats
For tap
switches
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194
Resistor Selection
Application Notes
RESISTOR FACTS AND FACTORS
Why Watts Must Be Accurately Known
Stated non-technically, any change in
current or voltage produces a much
larger change in the wattage (heat to be
dissipated by the resistor). Therefore,
the effect of apparently small increases
in current or voltage must be investi-
gated because the increase in wattage
may be large enough to be significant.
Mathematically, the wattage varies as
the square of the current, or voltage, as
stated in the formulas (b). For example,
an increase of 20% in current or voltage
will increase the wattage 44%. Figure 1
below graphically illustrates the square
law relation. Hence, the actual current
must be used in figuring the wattage and
the increase in wattage due to appar-
ently small changes, then determined in
order to select the proper size resistor.
Allowance should be made for maximum
possible line voltage.
A resistor is a device connected into an electrical circuit to
introduce a specified resistance. The resistance is measured in
ohms. As stated by Ohm’s Law, the current through the resistor
will be directly proportional to the voltage across it and inverse-
ly proportional to the resistance.
The passage of current through the resistance produces
heat. The heat produces a rise in temperature of the resis-
tor above the ambient temperature. The physical ability of the
resistor to withstand, without deterioration, the temperature
attained, limits the operating temperature which can be permit-
ted. Resistors are rated to dissipate a given wattage without
exceeding a specified standard “hot spot” temperature and the
physical size is made large enough to accomplish this.
Deviations from the standard conditions (“Free Air Watt
Rating”) affect the temperature rise and therefore affect the
wattage at which the resistor may be used in a specific applica-
tion.
SELECTION REQUIRES 3 STEPS
Simple short-cut graphs and charts in this catalog permit rapid
determination of electrical parameters. Calculation of each
parameter is also explained. To select a resistor for a specific
application, the following steps are recommended:
1.(a) Determine the Resistance.
(b) Determine the Watts to be dissipated by the Resistor.
2.Determine the proper “Watt Size” (physical size) as controlled by
watts, volts, permissible temperatures, mounting conditions and
circuit conditions.
3.Choose the most suitable kind of unit, including type, terminals and
mounting.
STEP 1 DETERMINE RESISTANCE AND WATTS
Ohm’s Law
(a) R = V or I = V or V = IR
I R
Ohm’s Law, shown in formula form
above, enables determination of the
resistance when the required voltage and
current are known. When the current and
voltage are unknown, or the best values
not decided on, at least two of the three
terms in Ohm’s Law must be measured
in a trial circuit.
(b) P = I2R or P = VI or P = V2
R
Power in watts, can be determined from
the formulas above, which stem from
Ohm’s Law. R is measured in ohms, V in
volts,I in amperes and P in watts.
Fig. 1: Rapid increase of wattage with current or voltage.
100
400
Percent Rated Watts
Percent Current
or Voltage
300
200
100
0
2000
STEP 2 POWER RATING OR PHYSICAL SIZE OF RESISTOR
A resistor operated at a constant wattage will attain a steady tem-
perature which is determined largely by the ratio between the size
(surface area) and the wattage dissipated, The temperature stabilizes
when the sum of the heat loss rates (by radiation, convection and
conduction) equals the heat input rate (proportional to wattage). The
greater the resistor area per watt to be dissipated, the greater the
heat loss rate and therefore the lower the temperature rise. The rela-
tion between the losses varies for different resistors.
Free Air Watt Rating
The wattage rating of resistors, as established under specified stan-
dard conditions, is defined as the “Free Air Rating” (“Full Rating” or
“Maximum Power Rating”). Several standard methods of rating are
in use based on different service conditions. The method of both
the “National Electrical Manufacturers Association” (NEMA) and the
“Underwriters’ Laboratories, Inc.” (UL) can be described as follows:
The relation of the “Free Air Watt Rating” of tubular type, vitre-
ous enameled resistors to the physical size, is to be set at such a
figure that when operated at their rated watts, the temperature rise
of the hottest spot shall not exceed 300°C (540°F) as measured by
a thermocouple when the temperature of the surrounding air does
not exceed 40°C (104°F). The temperature is to be measured at
the hottest point of a two-terminal resistor suspended in free still air
space with at least one foot of clearance to the nearest object, and
with unrestricted circulation of air.
A slightly different definition of temperature limit used as a basis
for wattage rating, and which results in a slightly higher attained
temperature, was originally established in military specification MIL-
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 195
Resistor Selection
Application Notes
R-26 for wirewound resistors.
Characteristic V resistors are required to dissipate rated wattage in
an ambient of 25°C without exceeding a maximum operating temper-
ature of 350°C at the hottest spot. This corresponds to a temperature
rise of 325°C in a 25°C ambient. Although MIL-R-26 permits a 25°C
greater temperature rise than NEMA or UL, the reference ambient for
the latter two is 15°C higher. Consequently, the difference in attained
temperature between the two systems is only 10°C. The curves in
Fig. 2 show the relation between temperature rise and wattage for
various specifications. Note the differences in the permissible rise for
each specification.
The absolute temperature rise for a specific resistor is roughly
related to the area of its radiating surface. It is also dependent upon
a number of other factors, however, such as thermal conductivity of
the core and coating materials, emissivity factor of the outer surfaces,
ratio of length to diameter, heat-sink effect of mountings, and other
minor factors.
The maximum permissible operating temperature for a given
resistor is basically determined by the temperature limitations
imposed by the materials used in its construction. Generally speak-
ing, these limits cannot be sharply defined in terms of temperature
alone. Other factors such as resistance stability versus time, dete-
rioration rates of insulation and moisture-resistance characteristics,
type and size of resistance wire, all enter into consideration of
“acceptable service life.”
For these reasons, the precise temperature limits corresponding to
100% rated wattage are somewhat arbitrary and serve primarily as
design targets. In the last analysis, once a wattage rating has been
assigned on the basis of an empirical hot spot limit, the verification of
its correctness must be established through long term load-life tests
based on performance and stability standards rather than the mea-
surement of hot spot temperature. Maximum limits are stipulated for
parameter changes as a result of various tests, including a 2000 hour
load-life test.
It is also assumed that the temperature rise at a given wattage
is independent of the ambient temperature in which this wattage
is being dissipated. Therefore, for high ambient temperatures, the
operating wattage should be limited in accordance with the curves
of Fig. 3. Although the assumption that temperature rise is indepen-
dent of ambient is not exactly true, the approximation is sufficiently
close for all practical purposes and, therefore, has been adopted for
derating purposes.
Despite the above variables, figures may be cited in terms of
“watts dissipated per square inch of winding surface” for a given
temperature rise. For power type resistors operating at 300°C rise
above ambient, this figure varies between approximately 6.3 watts
per square inch for large resistors (175 watt) to about 9 watts
per square inch for smaller resistors (12 watt). It should also be
observed from Fig. 2 that temperature rise is not directly proportional
to wattage dissipated. Note, for example, that at 50% rated wattage,
the temperature rise still remains about 70% of that at full rating.
The wattage ratings used in this catalog, unless otherwise stated for
certain types, are on the basis of a nominal operating temperature of
350°C at full rating. There are two general categories of power resis-
tors for which the 350°C nominal temperature limit does not apply.
One is that class of power-precision resistors where high stability is a
salient feature, in which case the operating temperature is nominally
limited to 275°C. The other category includes all exposed ribbon wire
resistors (see description of Corrib® and Powr-Rib®) which are rated
for 375°C (675°F) maximum temperature rise when measured on the
wire per NEMA standards.
Temperature Distribution on a Resistor
The temperature rise varies (following a curve) along the length
of the resistor with the hot spot at the center-top (of a horizontal
tube) and the ends at approximately 60% of the maximum tem-
perature rise. The terminals themselves are still cooler. When the
resistor is vertical, the hot spot shifts upwards a little and the top
end is hotter than the bottom. The standard “Free Air Watt Rating,”
however, is used regardless of position.
Fig. 2: Approximate hot spot temperature rise of a resistor in free air for various speci-
fications.
Fig. 3: Derating for ambient temperature.
100
400
Temperature Rise above Ambient Temperature
Resistor Load — Percent Rated Watts
300
200
100
00204060809010 30 50 70
350
250
150
50
700
600
500
400
300
200
100
0
°F°C
A 375°C 675°F
B 325°C 585°F
C 300°C 540°F
D 250°C 450°F
Bare Resistor—
NEMA;
Corrib & Powr-rib
U.L.-NEMA Std.
for Resistors
Ind. & Comm. Std.
Mil-R-26: Char. V
EIA: E, H & V
Mil-R-26: Char. U
EIA: Char. G
350
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 100 200 30050 150 250
80
40
U.L.-NEMA Std.
for Resistors
Ind. & Comm. Std.
Mil-R-26: Char. V.
EIA: Char. E, H & V
Mil-R-26: Char. U
EIA: Char. G
25°40°
275°340°
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196
STEPS 3 SELECT A RESISTOR
To allow for the differences between the actual service condi-
tions and the “Free Air Watt Rating” it is a general engineering
practice to operate resistors at more or less than the nominal
rating. The details by which such ratings can be estimated are
given in the following pages. Most thermal calculations, how-
ever, involve so many factors which are usually not accurately
known, that at best they are only approximations.
The most accurate method of determining or checking the
rating is to measure the temperature rise in a trial installation. A
thermocouple (made of #30 B & S gage wire) is recommended
for the measuring element. Even measurements made with a
thermocouple will vary slightly with different samples and tech-
niques. The factors which affect the temperature rise act inde-
pendently of each other and are summarized as follows:
1. Ambient Temperature
As the maximum permissible operating temperature is a set
amount, any increase in the ambient temperature subtracts
from the permissible temperature rise and therefore reduces
the permissible watt load.
2. Enclosure
Enclosure limits the removal of heat by convection currents in
the air and by radiation. The walls of the enclosure also intro-
duce a thermal barrier between the air contacting the resistor
and the outside cooling air. Hence, size, shape, orientation,
amount of ventilating openings, wall thickness, material and fin-
ish all affect the temperature rise of the enclosed resistor.
3. Grouping
When resistors are close to each other they will show an
increased hot spot temperature rise for a given wattage
because of the heat received by radiation from each other and
the increased heat per unit volume of air available for convec-
tion cooling.
4. Altitude
The amount of heat which air will absorb varies with the densi-
ty, and therefore with the altitude above sea level. At altitudes
above 100,000 feet, the air is so rare that the resistor loses
heat practically only by radiation.
APPLICATION WATT RATING
5. Pulse Operation
This is not an environmental condition but a circuit condition.
As a pulse of power, when averaged over the total on and off
time, results in less heat per unit time than for continuous duty,
the temperature rise is affected. This may permit higher power
during the pulses. The conditions must be expertly considered
for conservative rating. The open-wound “Powr-Rib®” resistor
construction is most suitable.
6. Cooling Air
Forced circulation of air over a resistor removes more heat per
unit time than natural convection does and therefore permits
an increased watt dissipation. Liquid cooling and special con-
duction mountings also can increase the rating.
7. Limited Temperature Rise
It is sometimes desirable to operate a resistor at a fraction of
the Free Air Watt Rating in order to keep the temperature rise
low. This may be to protect adjacent heat sensitive apparatus,
to hold the resistance value very precisely both with changing
load and over long periods of time and to insure maximum life.
8. Other Considerations
High Resistance. High resistance units, which require the
use of very small diameter wire, generally should operate at
reduced temperature for maximum reliability.
High Voltage
A maximum voltage gradient of 500 volts R.M.S. (705 volts
peak) per inch of winding length is recommended under nor-
mal conditions. For higher gradients in pulse applications or
for other special conditions such as oil immersion, consult fac-
tory.
High Frequency
Non-inductively wound resistors are generally required for use
at high frequencies.
Military and Other Specifications
The special physical operating and test requirements of the
applicable industrial or military specification must be consid-
ered. Military specification resistors should be ordered by their
MIL numbers.
Choose the most suitable resistor meeting the requirements of
the application. Standard resistors carried in stock should be
considered first. If a suitable resistor cannot be found in the
standard sizes or resistance values, then select a non-standard
resistor from the range on available sizes (consult factory).
Resistor Selection
Application Notes
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All the components of an electrical apparatus — resistors,
rheostats, capacitors, transformers, chokes, wiring, terminal
boards, rectifiers, transistors, electronic tubes, etc.—have their
own limitations as to the maximum temperature at which they
can reliably operate. The attained temperature in service is the
sum of the ambient temperature plus the temperature rise due
to the heat dissipated in the apparatus.
The temperature rise of a component is affected by a num-
ber of factors. The graphs and discussions which follow, ampli-
fy and supplement the factors on the previous page.
Note that the Multiplying Factors given on the Short Cut
Chart, on page 96 are the reciprocals of the “Percent Load
Ratings” shown on the graphs in this section. The percent fig-
ures are, of course, expressed as decimals before finding the
reciprocals.
Ambient Temperature Derating
Fig. 4 shows the percent of full load which power resistors can
dissipate for various high ambient temperatures.
Derating Due to Enclosure
The amount of derating required, if any, because of enclosure
is affected by a number of factors, most of which are hard to
determine accurately. The watts per square inch of surface,
size, shape, orientation, wall thickness, material, finish and
amount and location of ventilating openings all play a part. Fig.
5 serves to indicate for a particular set of conditions how the
temperatures varied with the size of enclosure for a moderate
size power resistor.
Derating Due to Grouping
The temperature rise of a component is affected by the nearby
presence of other heat-producing units, such as resistors, elec-
tronic tubes, etc. The curves in Fig. 6 show the power rating for
groups of resistors with various spacings between the closest
points of the resistors, assuming operation at maximum per-
missible hot spot temperature. If resistors are to be operated at
lower hot spot temperatures, the amount of derating for group-
ing can be reduced.
Derating for Altitude
The curve in Fig. 7 shows the proportional watts for various
altitudes, assuming standard atmospheric conditions.
ENVIRONMENTAL FACTORS—EFFECT ON THE POWER RATING OF COMPONENTS
7
100
Percent of Single Unit Wattage Rating
Number of Resistors in Group
60
20
0246135
80
40
2" (50.8 mm) space
8910 11 12
1" (25.4 mm) space
0.5" (12.7 mm) space
Fig.6: Derating of Resistors to Allow for Grouping
Fig. 4: Derating of Resistors for High Ambient Temperatures.
Fig.5: Example of Effect of Size of Enclosure on Temperature Rise of An Enclosed
Resistor.
100
300
Percent Rated Load
100
00257550
200
Temperature Rise
540
500
400
300
200
100
0
°F°C
Resistor in
Small Box
Resistor in
Large Box
Box Temp., Small
Box Temp., Large
Resistor
in Free Air
Resistor: 100 watt, 0.75 x 6.5"
(19.05 x 165.10 mm)
In unpainted 0.032"
(0.813 mm)
thick
upainted sheet steel box, no vents
Small box: 3.375 x 3.375 x 8"
(85.725 x 85.725 x 203.20 mm)
Large box: 5.813 x 5.813 x 12.75"
(147.65 x 147.65 x 323.85 mm)
Fig. 7: Derating for Altitude
70
100
Percent Rated Watts
Altitude in Thousands of Feet
60
20
0020406010 30 50
80
40
5000
ft.
1009080
350
100
Percent Rated Watts
Ambient Temperature, °C
60
20
00 100 200 30050 150 250
80
40
U.L.-NEMA Std.
for Resistors
Ind. & Comm. Std.
Mil-R-26: Char. V.
EIA: Char. E, H & V
Mil-R-26: Char. U
EIA: Char. G
25°40°
275°340°
Resistor Selection
Application Notes
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198
Pulse Operation
Unlike the environmental factors, which result in reduction of
the watt rating, pulse operation may permit higher power in the
pulses than the continuous duty rating.
The NEMA has set up certain standard duty cycles for motor
control resistors and the resistor ratings for some of these con-
ditions are shown in Fig. 8.
The curves in Figures 10,11,12 and 13 illustrate the more
general case of various combinations of on and off time for
specified loads up to 1000% for a continuous series of pulses.
Intermediate loads can be approximated by interpolation. The
“on-time” at which each curve flattens out also indicates the
maximum on-time for single pulses (with enough off-time for
cooling to ambient). Additional data on single pulses is given by
Fig. 9. Resistors will reach about 75% of the rated maximum
temperature rise in approximately 5 to 8 pulses and level off at
maximum rise in another 10 to 20 cycles, depending on per-
cent load, size, type, etc. Any curve passing above the inter-
section of the designated on and off-times indicates a percent
load which can be used. A resistor operated at the rating of an
interpolated curve through the point of intersection would oper-
ate at maximum rated temperature rise.
The exact temperature rise, of course, varies with each resis-
tor, depending on size, ohms winding, etc. The curves shown
indicate the approximate rise for typical units only, as a band or
range of values actually exists for each percent load.
Ratings at over 1000% are not recommended except for
Powr-Rib® resistors. Curves for intermediate size resistors can
be roughly estimated by comparison with the sizes given.
Ratings for single pulses in the milli-second range (and up to
1 to 2 seconds) require individual calculation. This is because
the ratings vary greatly with the resistance, or more specifically
with the actual weight and specific heat of the resistance alloy
used. Calculation is based on the assumption that all of the
heat generated in the pulse goes to raise the temperature of
the resistance wire.
Fig. 8: Percent of Continuous Duty Rating for Resistors for Typical NEMA Duty Cycles.
Fig. 9: Time Required for Typical Resistors to Reach Rated Operating Temperatures at
Various Watt Loads.
1000
Percent of Continuous-duty Wattage Rating
NEMA Duty Cycles
400
600
100
10 15 1551515
1200
800
Powr-rib
(low resistance)
0204010 30 5015 3552545
200
1400
100
150
175
200
225
250
275
300
325
350
125
375
70 45 1575 75 30
0.125 x 8.5" Corrib
(28.575 x 215.90 mm)
Powr-rib
(high resistance)
seconds on:
seconds off:
Percent of Continuous-duty Current Rating
Duty Cycle in Percent
700
Percent of Continuous-duty Wattage Rating
“On” Time in Seconds to Reach Rated Temperature
400
500
100
10 30 200520 100
800
600
200 watt vitreous enamel
1500 watt Corrib 0.125"
(3.175 mm),
ribbon
Low-resistance Powr-rib, edgewound
300 watt Corrib 0.125"
(3.175 mm),
ribbon
10 & 50 watt vitreous enamel
High-resistance Powr-rib, roundwire
0.1 0.5 40.3 2100.4 30.2 15
200
1000
“On” Time in Minutes to Reach Rated Temperature
20 30
50 300 500 1000 2000
300
000
Resistor Selection
Application Notes
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PULSE OPERATION — COOLING — LIMITED TEMPERATURES
Fig. 14: Percent of Free Air Rating for Typical Resistor Cooled by Forced Air
Circulation.
Fig. 10: 10 Percent of Continuous Duty Rating for Pulse Operation of small to Medium
Size Vitreous Enameled Resistors.
Fig. 11: Percent of Continuous Duty Rating for Pulse Operation of Large Vitreous
Enameled Resistors.
Fig.12: Percent of Continuous Duty Rating for Pulse Operation of CORRIB®, Corrugated
Ribbon Resistors.
Fig. 13: Percent of Continuous Duty Rating for Pulse Operation of Powr-Rib®, Bare
Resistors
Cooling Air
Resistors can be operated at higher than rated wattage when
cooled by forced circulation of air. A typical curve is illustrated
in Fig 14. The curve tends to level off at higher velocities as
excessive hot spots develop where the air flow does not reach
all parts uniformly.
Limited Temperature Rise
When it is desired to operate a resistor at less than maximum
temperature rise, the percent watts for a given rise can be
read from “Temperature Rise vs. Resistor Load” Fig 2 graph on
page 91.
10
“On” Time in Seconds
“Off” Time in Seconds
4
5
1
3110
7
2
3
24
5730 100
20 40
5070 300 1K
200 400
500
700 3K 10K
2K 4K
5K
7K
100
40
50
70
20
30
100
40
50
70
20
30
125%
Small Vitreous Enamel Resistors
10 watt
50 watt
150%
200%
500%
1000%
10
“On” Time in Seconds
“Off” Time in Seconds
4
5
1
3110
7
2
3
24
5730 100
20 40
5070 300 1K
200 400
500
700 3K 10K
2K 4K
5K
7K
100
40
50
70
20
30
100
40
50
70
20
30 125%
Large Vitreous Enamel Resistors
160 watt shown
150%
200%
500%
1000%
500
400
Percent Rated Watts
Air Velocity, ft./min.
300
200
100 10000 1500
350
250
150
10
“On” Time in Seconds
“Off” Time in Seconds
4
5
1
3110
7
2
3
24
5730 100
20 40
5070 300 1K
200 400
500
700 3K 10K
2K 4K
5K
7K
100
40
50
70
20
30
100
40
50
70
20
30
Corrib Resistors
300 watt
1500 watt 200%
500%
1000%
round wire
edgewound
10
“On” Time in Seconds
“Off” Time in Seconds
4
5
1
3110
7
2
3
24
5730 100
20 40
5070 300 1K
200 400
500
700 3K 10K
2K 4K
5K
7K
100
40
50
70
20
30
100
40
50
70
20
30
Powr-ribs
round wire
edgewound
200%
500%
1000%
300%
800%
200%
500%
1000%
300%
800%
Resistor Selection
Application Notes
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200
SHORT-CUT CHART METHOD TO FIND REQUIRED SIZE
(as affected by application conditions)
1. For each Condition, locate the relevant value on the scales below
and record the corresponding Factor (F1 to F7). Note: The Standard
Free Air Condition Factor is always 1.
Four resistors, each dissipating 115 watts, are to be
mounted in a group. Spacing is to be 2” surface to sur-
face. Ambient to be 50°C (122°F). Enclosure to be total.
Other factors standard. Determine Watt Size required.
Operation (1) On Ambient Temperature scale locate 50°C. Note and
record F1 = 1.1 as shown. Locate and record the other factors.
Operation (2) Multiply the factors together = 2.64
Operation (3) 115 Watts x 2.64 = 304 Watts Free Air Watt Size Rating
required for each resistor.
F1 F2 F3 F4 F5 F6 F7
50° 100% 4@2” StandardConditions
1.1 x 2.0 x 1.2 x 1 x 1 x 1 1
watts to be
dissipated
factor factor factor factor factor factor factor
Temperature at
installation includes
room temperature
plus temperature
rise due to adjacent
heat sources.
Factors apply
approximately for
average sheet
metal boxes of
dimensions such
that watts per sq.
in. of surface are in
the range of 0.2 to
0.4.
Factors apply to
uniformly spaced
banks of parallel
resistors with
spacing as shown.
Factors apply to
altitudes show. No
derating is required
for altitudes to
5000 ft. above sea
level.
Percent load for
pulse operation
must first be
determined from
graphs and data on
page xx.
Factors are
approximations
only. Effectiveness
of cooling varies
with installation.
Low temperatures
may be desired
because of
adjacent
apparatus,
increased stability
or maximum
reliability.
Record the
watts to be
dissipated as
set by your
circuit
conditions.
Standard
free air
conditions
°C F
1% F
2no. F3ft. F4% F
5fpm F6°C F
7
300 6.6
3.2
2.7
2.2
1.9
1.6
1.4
1.3
1.2
1.1
1.0
4.1
5.0
200
100
50
25
100 2.0
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.990
80
70
None
60
50
40
30
20
10
3 1.4
1.6
1.5
1.4
1.5
1.3
1.4
1.3
1.2
1.0
1.32
12
8
1
4
12
4
12
8
4
1.32
1.48
1.22
1.12
2" space 1" space 0.5" space std. brackets
100
1.5
1.5
1.4
1.3
1.2
1.1
1.0
90
80
70
0
60
50
40
30
20
10
1.05
1000 0.10
0.50
900
800
700
600
500
400
300
200
100 1.0
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
0.25
0.30
0.35
0.40
0.60
0.75
thousands of feet
percent load
1500 0.27
900
800
700
600
500
400
300
200
Still 1.0
0.28
0.29
0.30
0.32
0.35
0.40
0.50
0.60
0.70
0.80
0.90
100
1400
1300
1200
1100
1000
air velocity: feet per minute
40
13.0
300
200
1.0
10.0
8.0
6.0
4.0
3.0
1.75
1.3
1.2
1.1
100
50
7.0
5.0
2.5
2.0
1.5
1.4
Ambient
Temperature Enclosure Grouping Altitude
Pulse
Operation Cooling Air
Limited
Temp. Rise
Application ConditionsWatts
EXAMPLE
Resistor Selection
Application Notes
2. Multiply the Factors together.
3. Multiply the Watts by the product obtained from 2 above.
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TEMPERATURE COEFFICIENT OF RESISTANCE
The resistance alloys used for all except the lowest ohmic
values show such little change with temperature that in most
power circuits the resistance is considered constant. Actually
there may be changes at full load of -4% to +8% of the initial
resistance. The change is attributed in most part to the “tem-
perature coefficient of resistance” (TCR) which is the change
in resistance expressed as “parts per million per degree centi-
grade of temperature” (ppm/°C).
For special applications which require very constant resis-
tance, it may be necessary to specify the maximum permissible
TCR for the range of temperature involved. This would limit
the choice of wire to only certain types of resistance alloys.
The commonly known low TCR alloys in the 800 ohms per
circular-mil-foot class consist largely of nickel and chromium
alloyed with small amounts of aluminum and either copper or
iron. Other low resistivity alloys, 294 ohms per circular-mil-foot,
consist primarily of nickel and copper with only traces of other
metals.
+5%
Calculated Change in Resistance
Temperature Rise, °C
+2%
+3%
0 +200-100 +100
+6%
+4%
-50 +200+25 +1000 +300
0
+8%
Temperature Attained, °C
+300
+1%
+7%
-1%
-3%
-2%
90 ohms
per C.M.F. wire
+380 PPM/ϒC
675 ohms
per C.M.F. wire
+140 PPM/ϒC
Range for
294 or 800 ohms
per C.M.F. wire
±20 PPM/ϒC
Ambient
Temp.
Both of these wire classes are rated by the wire manu-
facturers as having a TCR of 0±20ppm/°C. The expression
“0±20ppm/°C” implies that, although the nominal value of the
TCR is zero, the actual value may lie anywhere within the toler-
ance range of –20ppm/°C to +20ppm/°C.
For other resistance wires such as the widely used nickel-
chromium-iron, for example, a nominal value of +140ppm/°C is
given. Actually, however, a tolerance of ±30ppm is applicable
so that the TCR may range between the limits of +110 to
+170ppm/°C.
Unfortunately, the TCR of a completed power resistor is
generally somewhat different from that of the original wire.
This is because the TCR may be affected by such factors as
heat treatment during processing, and materials and methods
of construction. Without special controls and precautions, the
TCR over the range of 25°C to 300°C rise may increase to as
much as
0±80ppm from the original 0±20ppm for certain types of
wire on vitreous enameled resistors. Theoretical changes in
resistance with temperature are shown in Fig. 15.
The circuit designer should carefully consider the actual
needs of the circuit before specifying limits on the TCR of a
desired resistor. Wherever possible it is best to select a resis-
tor for a critical application so that it operates at a low tem-
perature rise. This will also provide the maximum stability over
a long period. For low TCR (and other) applications, Ohmite
can provide resistors with an “Ohmicone” (silicone-ceramic)
coating. “Ohmicone” is processed at much lower temperatures
than vitreous enamel and therefore makes control of TCR and
tolerance easier. Data on the TCR and other properties of vari-
ous alloys is given on page 98.
Fig. 15: Calculated change in resistance with nominal TC assumed constant.
Resistor Selection
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202
RESISTANCE ALLOYS AND USES
A number of different resistance alloys are used in winding
resistors and rheostats as shown in Fig. 16. The general use
for each alloy is indicated by the column headed, “Resistance
Range for Which Used.” Whether a particular alloy can be used
on a specific resistor can be estimated by dividing the given
resistance by the area of the given winding space and deter-
mining whether the quotient falls within the limits given hereaf-
ter. The “high resistance” alloys cover the range from approxi-
mately 10 to 25,000 ohms per square inch of winding area, the
“low to medium” type from 5 to 400 ohms and the “very low
resistance” alloys from less than an ohm to 250 ohms. It should
be noted that the “Ohms per Square Inch” ranges overlap
considerably, indicating that in many instances a given resis-
tor could use any of several alloys. Both the upper and lower
limits of the ranges are only approximate and in general can be
extended somewhat when necessary.
The actual temperature coefficient of a complete resistor
is generally greater than the nominal for the wire alone. The
approximate change in overall resistance at full load is shown in
the table.
Other Alloys
In addition to the alloys tabulated which show small changes
in resistance with temperature, there are others which some-
times have to be used for very low resistance units. These
alloys have higher temperature coefficients, which limit their
use to applications where the change in resistance with load
is not important. An example is No. 60 alloy, which has a
resistance of 60 ohms per circular-mil-foot and a temperature
coefficient of +700ppm/°C.
Ballast Wire
There are other alloys which are selected especially for
their high temperature coefficient of resistance. These are
used for so-called “ballast” resistors where a large change in
resistance is desired with a change in load. A typical ballast
wire is Nickel, which has 58 ohms/cmf and a temperature coef-
ficient of +4800ppm/°C. Others are “Hytemco” and “Balco” at
120 ohms/CMF and a TC of +4500pp /°C.
*American Society for Testing Materials. Tentative Specification B267-68.
**For resistor with 300°C hot spot rise from 25°C ambient except 54°C rise for Manganin.
Fig. 16: Table of Resistance Alloys Generally Used for Resistors and Rheostats.
ASTM Ohms Mean Temp Temperature Resistance Average Resis-
Alloy Alloy Composition per Trade Coeff. of Res. Range for Range for tance Change
Class* (Approximate) CMF Names ppm/°C TCR °C Which Used at Full Load**
Nickel base, Evanohm
1a non-magnetic 800 Karma 0 ± 20 -65 to + 250 Very high, Medi Under ± 1%
Ni 75%, Cr 20% Moleculoy um and up, for to ± 2%
1b plus Al, Cu, Fe, etc. 800 Nikrothal L 0 ± 10 -65 to + 150 low temp. coeff.
Iron base, magnetic Alloy 815-R
2a Fe 73%, Cr 22.5%, 800 Kanthall Dr 0 ± 20 -65 to + 200 Alternate Under ± 1%
Al 4.5% (plus Co Mesaloy sometimes to ± 2%
2b in one alloy) 800 0 ± 10 0 to + 150 for Class 1
Chromel A
3a 650 Nichrome V + 80 ± 20
Nickel-Chromium Nikrothal B -65 to + 250 High and + 4 to + 5%
80% — 20% Protoloy A + 60 ± 20 medium
3b 675 Tophet C
Chromel C
Electroloy
4 Nickel-Chromium-Iron 675 Nichrome + 140 ± 30 -65 to + 200 High and + 5 to + 8%
60%—16%—24% Nikrothal 6 medium
Tophet C
Advance
5a Copel 0 ± 20 Low and low Under
Copper-Nickel 300 Cupron -65 to + 150 to medium for ± 1% to ± 2%
5b 55% — 45% Cuprothal 294 0 ± 40 low temp. coeff.
Neutroloy
Low and low Under
6 Manganin 290 Manganin 0 ± 15 + 15 to + 35 to medium for ± 1%
13% Mn, 87% Cu low TC near 25°C to ± 2%**
Copper-Nickel 180 Alloy
7 77% — 23% 180 Cuprothal 180 + 180 ± 30 -65 to + 150 Very low + 5% to + 8%
Midohm
Copper-Nickel 90 Alloy
9 90% — 10% 90 95 Alloy + 450 ± 50 -65 to + 150 Very low + 5% to + 10%
Cuprothal 90
Resistor Selection
Application Notes
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Ohm’s Law defines the relationships between (P) power, (V) voltage, (I) cur-
rent, and (R) resistance. One ohm is the resistance value through which one
volt will maintain a current of one ampere.
OHM’S LAW
Watts
P
Amps
I
Volts
V
Ohms
R
√P/R
√P•R
V•I
I2•R
V2/R
P/I
I•R V/I
V2/P
P/I2
P/V
V/R
R = Ohms
Ohms = Volts
Amperes
Ohms = Volts2
Watts
Ohms = Watts
Amperes2
V = Volts
Volts = Amperes s Ohms
Volts = Watts s Ohms
Volts = Watts
Amperes
P = Watts
Watts = Amperes2 s Ohms
Watts = Volts s Amperes
Watts = Volts2
Ohms
I = Amperes
Amperes = Volts
Ohms
Amperes = Watts
Volts
Amperes = Watts
Ohms
I Current is what flows on a wire or
conductor like water flowing down a
river. Current flows from negative to
positive on the surface of a conductor.
Current is measured in (A) amperes
or amps.
V Voltage is the difference in electri-
cal potential between two points in
a circuit. It’s the push or pressure
behind current flow through a circuit,
and is measured in (V) volts.
R Resistance determines how
much current will flow through a
component. Resistors are used to
control voltage and current levels. A
very high resistance allows a small
amount of current to flow. A very low
resistance allows a large amount of
current to flow. Resistance is mea-
sured in ohms.
P Power is the amount of current
times the voltage level at a given
point measured in wattage or watts.
100 10 10 10
102
105
107
110 11
113
115
118
12 12
121
124
127
130 13
133
137
140
143
147
150 15 15 15
154
158
16
162
165
169
174
178
18 18
182
187
191
196
200 20
205
210
215
22 22 22
221
226
232
237
24
243
249
250 25 25 25
1% Tol.
E96 Values
(Plus 250Ω
and 500Ω)
5% Tol.
E24 Values
(Plus 25Ω
and 50Ω)
10% Tol.
E12 Values
(Plus 25Ω
and 50Ω)
20% Tol.
E6 Values
(Plus 25Ω
and 50Ω)
255
261
267
27 27
274
280
287
294
30
301
309
316
324
33 33 33
332
340
348
357
36
365
374
383
39 39
392
402
412
422
43
432
442
453
464
47 47 47
475
487
499
500 50 50 50
51
511
523
536
549
56 56
562
576
590
604
619
62
634
649
665
68 68 68
681
698
715
732
750 75
768
787
806
82 82
825
845
866
887
909
91
931
953
976
1% Tol.
E96 Values
(Plus 250Ω
and 500Ω)
5% Tol.
E24 Values
(Plus 25Ω
and 50Ω)
10% Tol.
E12 Values
(Plus 25Ω
and 50Ω)
20% Tol.
E6 Values
(Plus 25Ω
and 50Ω)
1% Tol.
E96 Values
(Plus 250Ω
and 500Ω)
5% Tol.
E24 Values
(Plus 25Ω
and 50Ω)
10% Tol.
E12 Values
(Plus 25Ω
and 50Ω)
20% Tol.
E6 Values
(Plus 25Ω
and 50Ω)
Resistance Values
Preferred Standard Resistance Values
The resistance values listed below and their decimal multiples
have been designated as standard by the International Elec-
trotechnical Commission (IEC). This listing ensures that every
possible resistance value within its respective tolerance range
is represented. The omission of a resistance value does not
necessarily mean that Ohmite cannot manufacture the desired
value.
Please contact Ohmite at 866-964-6483 or sales@ohmite.
com for resistance values not shown in this table.
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204
Resistor Terminology
Adjustable Resistor: A resistor so constructed
that its resistance can be readily changed.*
Alternating Current: A periodic current the
average value of which over a period is zero.
The equation for alternating current is the same
as that for a periodic current except that I0=O*
Ambient Temperature: The temperature of
the surrounding coiling medium, such as gas
or liquid, which comes into contact with heated
parts of the apparatus.*
Ampere: The unit of constant current which,
maintained in two parallel rectilinear conduc-
tors of infinite length separated by a distance of
one meter, produces between these conductors
a force equal to 2x10-7 mks (meter-kilogram-
second) units of force per meter of length.
Armature Resistor: A resistor connected in
series with the armature of a motor either to
limit the inrush current on starting, the gradual
short circuiting of which brings the motor to
normal speed, or to regulate the speed by
armature-voltage control.
Axiohm†: Centohm® Coated axial terminal
wirewound resistor.
Bracket Terminal Resistor: A resistor
equipped with slotted metal end j brackets that
serve as a means of mounting and connecting
to the resistor.
Capacitance: That property of a system of
conductors and dielectrics which permits the
storage of electricity when potential differ-
ences exist between the conductors. Its value is
expressed as the ratio of a quantity of electricity
to a potential difference. A capacitance value is
always positive.*
Capacitor: A device, the primary purpose of
which is to introduce capacitance into an elec-
tric circuit. Capacitors are usually classified,
according to their dielectrics, as air capacitors,
mica capacitors, paper capacitors, etc.*
Clearance: The shortest distance through
space between two live parts, between live
parts and supports or other objects, or between
any live part and grounded part.
Conduction: The transmission of heat or elec-
tricity through, or by means of, a conductor.
Conductor: A body so constructed from con-
ducting material that it may be used as a carrier
of electric current.*
Continuous Duty: A requirement of service
that demands operation at a substantially con-
stant load for un indefinitely long time.*
Continuous-Duty Resistor: A resistor that is
capable of carrying continuously the current
for which it is designed without exceeding the
specified temperature rise.
Continuous Rating: Continuous rating is the
rating that defines the load which can be car-
ried for an indefinitely long time.*
Convection: Convection is the motion resulting
in a fluid owing to differences of density and the
action of gravity.
Corrib®†: A tubular resistor consisting of an
alloy resistance ribbon, crimped and edge-
wound on a ceramic core, the ribbon being
securely and permanently fastened to the core
by vitreous enamel or cement.
Creepage Distance: The shortest distance
between conductors of opposite polarity or
between a live part and ground as measured
over the surface of the supporting material.
Current-limiting Resistor: A resistor inserted
into an electric circuit to limit the flow of current
to some predetermined value. Note: A current-
limiting resistor, usually in series with a fuse or
circuit breaker, may be employed to limit the
flow of circuit or system energy at the time of a
fault or short-circuit.*
Dielectric Strength: The dielectric strength of
an insulating material is the maximum potential
gradient that the material can withstand without
rupture.* It is usually specified in volts per unit
thickness.
Dielectric Test: A test which consists of the
application of a voltage higher than the rated
voltage for a specified time for the purpose of
determining the adequacy against breakdown
of insulating materials and spacings under nor-
mal conditions.*
Direct Current: A unidirectional current in
which the changes in value are either zero or
so small that they may be neglected. A given
current would be considered a direct current in
some applications, but would not necessarily
be so considered in other applications.*
Dividohm®†: A resistor with a bare side and
clamp for adjustment.
Edgeohm†: A high-current resistor made of an
alloy resistance ribbon wound on edge form-
ing an oval-shaped coil supported by grooved
insulators which space adjacent turns and
insulate them from the support bars. Support
bars are secured to steel end pieces forming
a sturdy resistor suitable for continuous-and-
intermittent-duty applications.
EIA: Electronic Industries Alliance.
Electromotive Force: The electromotive force
is the agency causing the flow of current in
a circuit. It is the electrical pressure (or drop)
measured in volts.
Farad: The unit of capacitance of an electric
condenser in which a charge of one coulomb
produces a difference of potential of one volt
between the poles of the capacitor.
Ferrule Resistor: A resistor supplied with fer-
rule terminals for mounting in standard fuse
clips.
Field Discharge Switch: A switch usually of
the knife blade type having auxiliary contacts
for connecting the field of a generator or motor
across a resistor (field discharge) at the instant
preceding the opening of the switch.
Fixed Resistor: A resistor designed to intro-
duce only one set amount of resistance into an
electrical circuit.
Henry: The unit of inductance of a closed cir-
cuit in which an electromotive force of one volt
is produced when the electric current traversing
the circuit varies uniformly at the rate of one
ampere per second.
Hot Spot: The point or location of maximum
temperature on the external surface of a resis-
tor.
Inductance: The (scalar) property of an elec-
tric circuit or of two neighboring circuits which
determines the electromotive force induced in
one of the circuits by a change of current in
either of them.*
Impedance: The apparent resistance of an
AC circuit, being the combination of both the
resistance and reactance. It is equal to the ratio
of the value of the EMF between the terminals
to the current, there being no source of power
in the portion under consideration. The unit
of impedance is the ohm and is represented
by Z.
Intermittent Duty: A requirement of service
that demands operation for alternate intervals
of (1) load and no-load; or (2) load and rest; or
(3) load, no-load and rest; such alternate inter-
vals being definitely specified.*
Intermittent-Duty Resistor: A resistor capable
of carrying for a short period of time the high
overload current for which it is designed without
exceeding the specified temperature rise.
Machine-Duty Resistor: A resistor for use in
the armature or rotor circuit of a motor in which
the armature current is almost constant.
Mega Ohm: A unit of resistance equal to one
million ohms.
MIL Resistor: A resistor built in accordance
with Joint Army-Navy specifications.
Multi-Section Resistor: A resistor having two
or more electrically independent sections.
NEC: The National Electrical Code is the stan-
dard of the National Board of Fire Underwriters
for electric wiring and apparatus as recom-
mended by the National Fire Protection
Association and approved by the American
Standards Association.
NEDA: National Electronic Distributors
Association.
NEMA: The National Electrical Manufacturers
Association, a non-profit trade association,
supported by the manufacturers of electrical
apparatus and supplies. NEMA is engaged
in standardization to facilitate understanding
between the manufacturers and users of elec-
trical products.
Nominal Diameter: As applied to tubular resis-
tors, this is the diameter of the ceramic tube
expressed in inches and/or fractions thereof.
Nominal Length: As applied to tubular resis-
tors, this is the length of the resistor base
or core expressed in inches and/or fractions
thereof.
Non-Inductive Resistor: A non-inductive
power resistor is one in which the inductance
and distributed capacitance are reduced to an
absolute minimum.
Ohm: A unit of resistance defined as the resis-
tance at 0°C of a column of mercury of uniform
cross-section having a length of 106.3 centime-
ters and a mass of 14.4 grams.
Ohmmeter: An instrument for measuring elec-
tric resistance that is provided with a scale
graduated in ohms.
Periodic Duty: A type of intermittent duty in
which the load conditions are regularly recur-
rent.*
Periodic Rating: The rating which defines
the load which can be carried for the alternate
periods of load and rest specified in the rating,
the apparatus starting cold and for the total time
specified in the rating without causing any of
the specified limitations to be exceeded.*
Power: The time rate of transferring or trans-
forming energy; the rate of doing work or
expending energy.
Power Resistor: A resistor capable of dissipat-
ing 5 watts or more.
Rating: A designated limit of operating char-
acteristics of a machine, apparatus or device,
based on definite conditions.
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Resistor Terminology
RESISTANCE VALUES
Abbreviations and Part Numbering Structure
Note 1: Such operating characteristics as load,
voltage, frequency, etc., may be given in the
rating.
Note 2: The rating of control apparatus in gener-
al is expressed in volts, amperes, horsepower
or kilowatts as may be appropriate, except
that resistors are rated in ohms, amperes and
class of service.*
Reactor: A device used for introducing reac-
tance into a circuit for purposes such as motor
starting, paralleling transformers and control of
current.*
Rectifier: A device which converts alternating
current to unidirectional current by virtue of a
characteristic permitting appreciable flow of
current in only one direction.*
Resistance: The (scalar) property of an electric
circuit or of any body which may be used as
part of an electric circuit which determines for a
given current the rate at which electric energy
is converted into heat or radiant energy and
which has a value such that the product of the
resistance and the square of the current gives
the rate of conversion of energy. In the general
case, resistance is a function of the current, but
the term is most commonly used in connection
with circuits where the resistance is indepen-
dent of the current.*
Resistance Tolerance: The resistance tol-
erance of a power resistor is the extent to
which its resistance may be permitted to devi-
ate above or below the specified resistance.
Resistance tolerance is usually expressed in
percent.
Resistance Method of Temperature
Determination: This method consists in the
determination of temperature by comparison of
the resistance of the winding at the temperature
to be determined with the resistance at a known
temperature.**
Resistive Conductor: A resistive conductor is
a conductor used primarily because it possess-
es the property of high electric resistance.*
Resistivity: The resistivity of a material is the
resistance of a sample of the material having
specified dimensions.
Resistor: A device, the primary purpose of
which is to introduce resistance into an electric
circuit.*
Resistor Core: The resistor core or base of
a power resistor is the insulating support on
which the resistive conductor is wound.
Rheostat: An adjustable resistor so construct-
ed that its resistance may be changed without
opening the circuit in which it may be con-
nected.*
Screw-Base Resistor: A power-type resistor
equipped with Edison-type screw-base termi-
nals for quick interchangeability.
Short-Time Rating: The rating that defines the
load which can be carried for a short and defi-
nitely specified time, the machine, apparatus or
device being at approximately room tempera-
ture at the time the load is applied.*
Silicone: A silicone coating meeting MIL-R-26
used on power type wirewound resistors.
Slim Mox A flat style resistor Ohmite manufac-
tures. They are available in a variety of sizes
and values.
Single-Wound Resistor: A resistor that has
only one layer of resistance wire or ribbon
wound around the insulating base or core.
Stackohm®†: A resistor consisting of a hollow
ceramic core, oval in shape, about which resis-
tance wire is wound and completely embedded
in an insulating and heat conducting coating.
Still Air: Still air is considered air having no
circulation except that created by the heat of
the resistor which is being operated.
Tapped Resistor: A resistor with two or more
steps.
Temperature Coefficient of Resistance: A
measure of the increase or decrease in resis-
tance of a resistive conductor due to change in
temperature in parts per million (ppm).
RT = Rr + [Rr(αT – αTr)]
Where,
RT = Resistance of conductor at temperature
T
Rr = Resistance of conductor at reference
temperature Tr
α = Temperature coefficient of resistance at
reference temperature Tr
Temperature Rise: Temperature rise is the dif-
ference in temperature between the initial and
final temperature of a resistor. Temperature rise
is expressed in degrees C or F, usually referred
to an ambient temperature. Temperature rise
equals the hot spot temperature minus the
ambient temperature.
Thermal Shock: Thermal shock consists of a
sudden marked change in the temperature of
the medium in which the device operates.
Thermocouple: A device for converting heat
energy into electrical energy consisting of a
pair of dissimilar conductors so joined as to
produce a thermo-electric effect. It is used with
a millivoltmeter to measure temperature rise in
apparatus.
Thermometer Method of Temperature
Determination: This method consists in the
determination of the temperature by a mercury
or alcohol thermometer, by a resistance ther-
mometer, or by a thermocouple, any of these
instruments being applied to the hottest part
of the apparatus accessible to a mercury or
alcohol thermometer.**
Tolerance (%) The tolerance is the allowable
deviation from teh nominal resistance value.
Varying Duty: A requirement of service that
demands operation at loads, and for intervals
of time, both of which may be subject to wide
variation.*
Voltage (V or E): The unit of measure is
the volt. A unit of electrical pressure, EMF or
potential difference. Ohmite’s voltage rating is
the voltage that can be applied to the resistor
without arcing or degrading the resistor.
Voltage Coefficient (VCR) The unit of mea-
sure is in parts per million (ppm). Voltage coef-
ficient defines the change in the value of the
resistor that occurs as the voltage changes.
The resistor is measured at two voltages and
the deviation is then calculated. VCR is usually
states as the change per volt (ex. 2ppm/v).
Watt: A unit of electric power. It is the power
expended when one ampere of direct current
flows through a resistor of one ohm.
Winding Pitch: The distance from any point
on a turn of a resistive conductor to the cor-
responding point on an adjacent turn measured
parallel to the long axis of the winding.
* ASA Standard
** NEMA Standard
† Ohmite trade name
DescriptionPrefix Abbreviation
Part
Numbering
Structure Numeric Value
Milli m Thousandth
Centi c Hundredth
Deci dTenth
——One
Deca, Deka da Ten
Hecto h Hundred
Kilo k Thousand
Tera TTrillion
Giga G Billion
Mega M Million
R001 0.001 1 Milli Ohm
R010 0.01 1 Centi Ohm
R100 0.1 1 Deci Ohm
1R00 11Ohm
10R0 10 1 Deca Ohm
1000* 100 1 Hecto Ohm
1001* 1,000 1 Kilo Ohm
1002* 10,000 10 Kilo Ohms
1003* 100,000 100 Kilo Ohms
1004* 1,000,000 1 Mega Ohm
1504* 1,500,000 1.5 Mega Ohms
1005* 10,000,000 10 Mega Ohms
1006* 100,000,000 100 Mega Ohms
1506* 150,000,000 150 Mega Ohms
1007 1,000,000,000 1 Giga Ohm
1507 1,500,000,000 1.5 Giga Ohms
1008 10,000,000,000 10 Giga Ohms
1009 100,000,000,000 100 Giga Ohms
1509 150,000,000,000 150 Giga Ohms
100A 1,000,000,000,000 1Tera Ohm
150A 1,500,000,000,000 1.5 Tera Ohms
100B 10,000,000,000,000 10 Tera Ohms
*Part Numbering Structure may vary by product line
Scientific
Notation
1.0 x 10-3
1.0 x 10-2
1.0 x 10-1
1.0 x 100
1.0 x 101
1.0 x 102
1.0 x 103
1.0 x 104
1.0 x 105
1.0 x 106
1.5 x 106
1.0 x 107
1.0 x 108
1.5 x 108
1.0 x 109
1.5 x 109
1.0 x 1010
1.0 x 1011
1.5 x 1011
1.0 x 1012
1.5 x 1012
1.0 x 1013