RWR Military
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Vishay Dale
MATERIAL SPECIFICATIONS
DERATING
120
Element: copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
100
80
60
40
20
Core: ceramic, beryllium oxide (1), steatite or alumina,
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
0
Terminals: solderable - Tinned Copperweld®
Weldable - bare nickel per MIL-STD-1276, Type N-1
- 65- 50
0
50
150
250
25
AMBIENT TEMPERATURE IN °C
End Caps: stainless steel
Part Marking: source code, JAN, military PIN, date/lot code
Note
(1)
RWR82S and RWR82N: Core consists of beryllium oxide
ceramic
PERFORMANCE
TEST
CONDITIONS OF TEST
MIL-STD-202, method 107
TEST LIMITS
Thermal Shock
(0.2 % + 0.005 ) R
5x rated power (RWR71, RWR80, RWR81, RWR89, RWR82),
Short Time Overload
(0.2 % + 0.005 ) R
(0.1 % + 0.005 ) R
10 x rated power (RWR74, RWR78, RWR84) for 5 s
500 VRMS (RWR80, RWR81, RWR82),
1000 VRMS (RWR71, RWR74, RWR78, RWR84, RWR89), 1 min duration
Dielectric Withstanding Voltage
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
-55 °C for 24 h
(0.1 % + 0.005 ) R
(1.0 % + 0.005 ) R (1)
(0.2 % + 0.005 ) R
(0.1 % + 0.005 ) R
(0.1 % + 0.005 ) R
(0.5 % + 0.005 ) R
(1.0 % + 0.005 ) R
250 °C for 2000 h
MIL-STD-202, method 106
MIL-STD-202, method 213, condition I
MIL-STD-202, method 204, condition D
2000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
10 000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
Extended Life
MIL-STD-202, method 211, condition A and C
5 pound (RWR80, RWR81, RWR82),
10 pound (RWR71, RWR74, RWR78, RWR84, RWR89)
Terminal Strength
(0.1 % + 0.005 ) R
Note
(1)
For resistance values above 100 , test limit is 1.0 %
Revision: 15-Nov-17
Document Number: 30203
3
For technical questions, contact: ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000