1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
100
WH/WN Series
Miniature Molded Wirewound FEATURES
•WHprecisionseries
•WNArytonPerrywindingNon-Inductiveseries:
Inductance<1nHat1MHZtest,
•DesignedtomeetMIL-R-26F,MIL-STD-202stan-
dardrequirements
•Manufacturingprocess-Wirewinding/Spot
Welding-byComputerNumericalControl(CNC)
machinetoolstoensureconsistencyofproduct
quality.
•Encapsulatedbyepoxymoldingcompound
•AdvancedICencapsulationmold/dietechnologies
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)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 101
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
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
rev 2/18-1
