RWR Military
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Vishay Dale
DIMENSIONS in inches [millimeters]
1.50 [38.10] (1)
A
min.
C
B
DIMENSIONS in inches [millimeters]
B
MILITARY MODEL
A
C
RWR81
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
0.250 0.031 [6.35 0.787]
0.085 0.020 [2.16 0.508]
0.078 + 0.016 - 0.031 [1.98 + 0.406 - 0.787]
0.094 0.031 [2.39 0.787]
0.187 0.031 [4.75 0.787]
0.187 0.031 [4.75 0.787]
0.312 0.031 [7.92 0.787]
0.312 0.031 [7.92 0.787]
0.312 0.031 [7.92 0.787]
0.020 0.0015 [0.508 0.038]
0.020 0.0015 [0.508 0.038]
0.020 0.0015 [0.508 0.038]
0.032 0.002 [0.813 0.051]
0.032 0.002 [0.813 0.051]
0.040 0.002 [1.02 0.051]
0.040 0.002 [1.02 0.051]
0.040 0.002 [1.02 0.051]
0.312 0.016 [7.92 0.406]
0.406 0.031 [10.31 0.787]
0.812 0.062 [20.62 1.58]
0.560 0.062 [14.22 1.58]
0.875 0.062 [22.23 1.58]
0.875 0.062 [22.23 1.58]
1.780 0.062 [45.21 1.58]
Note
(1)
On some standard reel pack methods, the leads may be trimmed to a shorter length than shown.
MATERIAL SPECIFICATIONS
DERATING
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
120
Core: Ceramic, beryllium oxide, steatite or alumina,
100
80
60
40
20
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
Terminals: Solderable - Tinned Copperweld®
0
- 65- 50
0
50
150
250
Weldable - bare nickel per MIL-STD-1276, Type N-1
25
AMBIENT TEMPERATURE IN °C
End Caps: Stainless steel
Part Marking: Source code, JAN, military PIN, date/lot code
PERFORMANCE
TEST
CONDITIONS OF TEST
MIL-STD-2.2, method 303
TEST LIMITS
Thermal Shock
(0.2 ꢀ + 0.005 ) R
5 x rated power (RWR71, RWR80, RWR81, RWR89, RWR82),
10 x rated power (RWR74, RWR78, RWR84) for 5 s
Short Time Overload
(0.2 ꢀ + 0.005 ) R
(0.1 ꢀ + 0.005 ) R
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
- 65 °C for 24 h
(0.1 ꢀ + 0.005 ) R
(1.0 ꢀ + 0.005 ) R (2)
(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 1
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
(2)
For resistance values above 100 , test limit is 1.0 ꢀ.
Revision: 12-Sep-11
Document Number: 30203
2
For technical questions, contact: ww2bresistors@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
