RWR Military

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Vishay Dale

Revision: 30-Mar-12

3

Document Number: 30203

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

MATERIAL SPECIFICATIONS

Element: Copper-nickel alloy or nickel-chrome alloy,

depending on resistance value

depending on power requirement

Coating: Special high temperature silicone

Terminal and Winding: The terminal and the winding are

identified by a letter symbol in the military type designation.

Military symbol:

S = Solderable, inductively wound

W = Weldable, inductively wound

N = Solderable, non-inductively wound

Z = Weldable, non-inductively wound

Weldable - bare nickel per MIL-STD-1276, Type N-1

End Caps: Stainless steel

Part Marking: Source code, JAN, military PIN, date/lot code

Note

ceramic

DERATING

Note

(2)

For resistance values above 100

, test limit is ± 1.0 %.

AMBIENT TEMPERATURE IN °C

25

0

20

40

60

80

100

120

- 65 - 50

0

50

150

250

PERFORMANCE

TEST

CONDITIONS OF TEST

TEST LIMITS

Thermal Shock

MIL-STD-202, method 107

± (0.2 % + 0.005

) R

Short Time Overload

5 x rated power (RWR71, RWR80, RWR81, RWR89, RWR82),

10 x rated power (RWR74, RWR78, RWR84) for 5 s

± (0.2 % + 0.005

) R

Dielectric Withstanding Voltage

± (0.1 % + 0.005

) R

Low Temperature Storage

- 55 °C for 24 h

± (0.1 % + 0.005

) R

High Temperature Exposure

250 °C for 2000 h

± (1.0 % + 0.005

Moisture Resistance

MIL-STD-202, method 106

± (0.2 % + 0.005

) R

Shock, Specified Pulse

MIL-STD-202, method 213, condition I

± (0.1 % + 0.005

) R

Vibration, High Frequency

MIL-STD-202, method 204, condition D

± (0.1 % + 0.005

) R

Load Life

2000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF”

± (0.5 % + 0.005

) R

Extended Life

10 000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF”

± (1.0 % + 0.005

) R

Terminal Strength

MIL-STD-202, method 211, condition A and C

5 pound (RWR80, RWR81, RWR82),

10 pound (RWR71, RWR74, RWR78, RWR84, RWR89)

± (0.1 % + 0.005

) R