Wirewound High

Surge Resistors

WHS Series

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General Note

TT electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

© TT electronics plc

08. 12

Dimensions (mm) & Weight (g)

Type

L max

D max

f min

d nom

PCB

mount

centres

Min

bend

radius

Wt. nom

WHS2

9.0

3.6

19.80

0.8

12.70

1.2

0.50

WHS3

14.5

5.2

24.55

20.30

1.10

WHS5

16.5

7.0

23.55

22.86

1.75

WHS7

25.0

8.8

28.30

31.40

4.40

WHS2

WHS3

WHS5

WHS7

Power rating at 25ºC

watts

2

3

5

7

5s overload rating at 25ºC

watts

10

15

25

35

Short pulse performance

See Pulse Performance graphs

Resistance range

ohms

1R0-330R

TCR

ppm/ºC

200

Isolation Voltage

volts

250

350

500

700

Resistance Tolerance

%

<20R: 5

≥20R: 1, 2, 5

Standard Values

E12 preferred

Thermal Impedance

ºC/watt

110

82

54

35

Ambient temperature range

ºC

-55 to +155

Construction

A high purity ceramic substrate is assembled with interference fit end caps to which are welded the terminations. The resistive

element is wound on the substrate and welded to the caps. Flameproof silicone cement coating is applied priorto marking with

indelible ink. The components are then leadformed if required and packed.

Electrical Data

Physical Data

No Limiting Element Voltage applies to this series; the Rated Voltage is

√(P.R).

f

D

d

L