32 Ohmite Mfg. Co. 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
L
DC
FEATURES
• Terminals suitable for soldering
or bolt connection.
• Adjustable lug supplied.
• High wattage applications.
• All-welded construction.
• Rugged lead free vitreous enam-
el coating.
• Flame resistant coating.
• Thumb-screw-adjustable lug
available (Part No. 2160) for
1.125” core resistors.
• RoHS compliant product avail-
able. Add “E” suffix to part num-
ber to specify.
Dimensions (in. / mm) Core Standard
Series Wattage Ohms L D C Code Voltage Terminal
D12 12 1.0-10K 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 565 57
D25 25 1.0-25K 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 625 40
D50 50 1.0-100K 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 1625 40
D75 75 1.0-100K 6.0 / 152.4 0.562 / 14.3 0.313 / 7.94 K 2625 40
D100 100 1.0-100K 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 2845 40
D175 175 1.0-100K 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 3595 46
D225 225 1.0-100K 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 4595 46
D500 500 1.5-15K 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 4970 45
D1000 1000 3.0-27.7K 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 8900 45
Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.
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 con-
tact units, available.)
Derating: Linearly from 100% @
+25°C to 0% @ +350°C.
Electrical
Tolerance: ±10% (K)
Power rating: Based on 25°C
free air rating. The stated watt-
age rating applies only when the
entire resistance is in the circuit.
Setting the lug at an intermediate
point reduces the wattage rat-
ing by approximately the same
proportion. Example: If the lug is
set at half resistance, the watt-
age is reduced by approximately
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)
To calculate max. amps: use the
formula √P/R.
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
necessary for
ratings higher
than 100W.
See page 36
for mounting hardware
Choose Ohmite’s 210 Type adjustable resistors for applications
requiring settings at different resistance values. These wire-
wound resistors are equipped with an adjustable lug, making
them ideal for adjusting circuits, obtaining odd resistance values
and setting equipment 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.
210 Series
Dividohm® Vitreous Enamel
Adjustable Power
Standard part numberS for 210 SerieS
= Standard values; check availability using the worldwide inventory
search at 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
made-to-order
See website for custom
core and terminal info
ordering info
Tolerance
J= 5%
K= 10%
Ohms
1R0 = 1 Ω
250 = 250 Ω
1K0 = 1,000 Ω
25K = 25,000 Ω
25K5 = 25,500 Ω
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 = 0.500 Ω
1R00 = 1 Ω
250R = 250 Ω
1K00 = 1,000 Ω
25K0 = 25,000 Ω
25K5 = 25,500 Ω
RoHS Compliant
Coating
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
Wattage
Terminal Type
See “Resistor Terminals
for Tubular Cores”
SPECIFICATIONS
Adjustability is 10% to 90% of full
value. Wattage is proportional to
this adjusted resistance value.
Material
Coating: Lead free vitreous
enamel.
Core: Tubular ceramic.
