14

15

WH/WN Series

Miniature Molded Wirewound

F E A T U R E S

• WHM, UltraHigh ohmic value

precision series,

• WNM, Aryton Perry winding Non-

Inductive available.

Inductance <1nH at 1MHZ test,

• Designed to meet the most strin-

gent MIL-R-26F, MIL-STD-202

standard requirements

• Miniaturized Better power to

dimension ratios

• Use of the highest quality stan-

dard (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

Power

Resistance

Rating

Range

Dim. L

Dim. D

Dim. d

Type

(watts)

(Ω)

(mm/in)

(mm/in)

(mm/in)

WHA

0.5

0.100 - 1.0K 5.08 / 0.200 2.54 / 0.100

0.60 / 0.024

WNA

0.100 - 250

WHB

1

0.100 - 4.0K 7.00 / 0.276 3.00 / 0.120

0.60 / 0.024

WNB

0.100 - 1.0K

WHC

2

0.10 - 8.0K

11.4 / 0.450 6.86 / 0.270

0.80 / 0.031

WNC

0.10 - 2.0K

S P E C I F I C A T I O N S

Material

Ceramic Core: CeramTec

End Caps: Stainless steel, preci-

sion formed

Leads: Copper wire,100% Sn

(lead free) coated

ISAOHM alloy resistance wire

TC+/-20ppm/°C

Encapsulation: SUMICON 1100/

1200 Epoxy molding compound

for IC encapsulation

Electrical

Standard Tolerance: F (1.0%),

J (5.0%)

Temperature Coefficient

(ppm/°C):

±90 for 0.100Ω

±20 for >0.100Ω

Maximum Working Voltage:

(PxR)1/2

Derating: Linearly from

100% @ +70°C to

0% @ +150°C.

Operating Temp: -55°C to

+150°C

P E R F O R M A N C E C H A R A C T E R I S T I C S

Test

Conditions of Test

Performance

Thermal Shock

Rated power applied until thermal stability,

-55°C +0°C,-5°C,15min.

±0.2%

Short-time Overload 5 times rated wattage for 5 seconds

±0.2%

Solderability

Method 208 of MIL-STD-202

±0.2%

Terminal Strength

Pull test:10 pounds, 5 to10 seconds, Twist

test: 1080°,5 second/rotation

±0.1%

Dielectric

Withstanding Voltage

500Volts rms for 1W, 2W 1000Volts rms.

1 minute

±0.1%

High Temperature

Exposure

Exposed to an ambient temperature of 275

+5/-0°C for 250 ±8 hours,

±0.5%

Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ±0.2%

Low Temperature

Storage

Cold chamber at a temperature of -65 ±2°C

for 24+/-4 hours

±0.2%

Vibration, High

Frequency

Frequency varied 10 to 2000Hz, 200G peak,

2 directions 6 hours each

±0.1%

Load Life

1000/2000 hours at rated power, +25°C, 1.5

hours “On”, 0.5 hours “Off”

±0.5%

O R D E R I N G I N F O R M A T I O N

L

D

0.984 /

25

d

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Series

Ohms

Power

A = 0.5

B = 1

C = 2

Tolerance

F = 1%

J = 5%

Package

T = Tape

blank = 25pc Pack

RoHS compliant

H = Inductive

N = Non Inductive

S T A N D A R D P A R T N U M B E R S F O R W H / W N S E R I E S

Wattage:

0.5

0.5

1.0

1.0

2.0

2.0

Series:

WHA

WNA

WHB

WNB

WHC

WNC

Ohms

0.1

WHAR10FE

WNAR10FE

WHBR10FE

WNBR10FE

WHCR10FE

WNCR10FE

0.25

WHAR25FE

WNAR25FE

WHBR25FE

WNBR25FE

WHCR25FE

WNCR25FE

0.50

WHAR50FE

WNAR50FE

WHBR50FE

WNBR50FE

WHCR50FE

WNCR50FE

0.75

WHAR75FE

WNAR75FE

WHBR75FE

WNBR75FE

WHCR75FE

WNCR75FE

1

WHA1R0FE

WNA1R0FE

WHB1R0FE

WNB1R0FE

WHC1R0FE

WNC1R0FE

2

WHA2R0FE

WNA2R0FE

WHB2R0FE

WNB2R0FE

WHC2R0FE

WNC2R0FE

4

WHA4R0FE

WNA4R0FE

WHB4R0FE

WNB4R0FE

WHC4R0FE

WNC4R0FE

5

WHA5R0FE

WNA5R0FE

WHB5R0FE

WNB5R0FE

WHC5R0FE

WNC5R0FE

10

WHA10RFE

WNA10RFE

WHB10RFE

WNB10RFE

WHC10RFE

WNC10RFE

15

WHA15RFE

WNA15RFE

WHB15RFE

WNB15RFE

WHC15RFE

WNC15RFE

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

150

WHA150FE

WNA150FE

WHB150FE

WNB150FE

WHC150FE

WNC150FE

200

WHA200FE

WNA200FE

WHB200FE

WNB200FE

WHC200FE

WNC200FE

250

WHA250FE

WNA250FE

WHB250FE

WNB250FE

WHC250FE

WNC250FE

330

WHA330FE

WHB330FE

WNB330FE

WHC330FE

WNC330FE

470

WHA470FE

WHB470FE

WNB470FE

WHC470FE

WNC470FE

560

WHA560FE

WHB560FE

WNB560FE

WHC560FE

WNC560FE

750

WHA750FE

WHB750FE

WNB750FE

WHC750FE

WNC750FE

1K

WHA1K0FE

WHB1K0FE

WNB1K0FE

WHC1K0FE

WNC1K0FE

2.5K

WHB2K5FE

WHC2K5FE

K E Y T O F I V E - B A N D C O D E

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

Gold

x

0.1Ω

±

5% (J)

Silver

x 0.01Ω

± 10% (K)

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