RWR Military
www.vishay.com Vishay Dale
Revision: 11-Jul-13 1Document Number: 30203
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
Wirewound Resistors, Military/Established Reliability,
MIL-PRF-39007 Qualified, Type RWR, R Level, Axial Lead
FEATURES
• High temperature silicone coated
• Complete welded construction
• Qualified to MIL-PRF-39007
• Available in non-inductive styles (type N) with
Ayrton-Perry winding for lowest reactive components
• “S” level failure rate available
Note
• “Terminal Wire and Winding” type “W” and “Z” are not listed
below but are available upon request. Please reference
MIL-PRF-39007 QPL for approved “failure rate” and “resistance
tolerance/ranges”
Note
• RWR82S and RWR82N: Core consists of beryllium oxide ceramic
Note
(1) Note that “W” and “Z” are not listed above but are available, see MIL-PRF-39007 QPL for available resistance values.
STANDARD ELECTRICAL SPECIFICATIONS
MILITARY MODEL VISHAY REFERENCE
MODEL
POWER RATING
P25 °C W
RESISTANCE RANGE RESISTANCE RANGE WEIGHT
(typical) g
± 0.1 % ± 0.5 %, ± 1 %
RWR81S EGS-1-80 1 0.499 to 1K 0.1 to 1K 0.21
RWR81N EGN-1-80 1 0.499 to 499 0.1 to 499 0.21
RWR82S EGS-2 2 0.499 to 1.3K 0.1 to 1.3K 0.23
RWR82N EGN-2 2 0.499 to 649 0.1 to 649 0.23
RWR80S EGS-3-80 2 0.499 to 3.16K 0.1 to 3.16K 0.34
RWR80N EGN-3-80 2 0.499 to 1.58K 0.1 to 1.58K 0.34
RWR71S ESS-2A 2 0.499 to 12.1K 0.1 to 12.1K 0.90
RWR71N ESN-2A 2 0.499 to 6.04K 0.1 to 6.04K 0.90
RWR89S ESS-2B 3 0.499 to 4.12K 0.1 to 4.12K 0.70
RWR89N ESN-2B 3 0.499 to 2.05K 0.1 to 2.05K 0.70
RWR74S ESS-5 5 0.499 to 12.1K 0.1 to 12.1K 4.2
RWR74N ESN-5 5 0.499 to 6.04K 0.1 to 6.04K 4.2
RWR84S EGS-10-80 7 0.499 to 12.4K 0.1 to 12.4K 3.6
RWR84N EGN-10-80 7 0.499 to 6.19K 0.1 to 6.19K 3.6
RWR78S ESS-10 10 0.499 to 39.2K 0.1 to 39.2K 9.0
RWR78N ESN-10 10 0.499 to 19.6K 0.1 to 19.6K 9.0
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: RWR74S49R9FSB12
MIL TYPE
(5 digits)
TERMINAL WIRE AND WINDING
(1 digit)
RESISTANCE VALUE
(4 digits)
TOLERANCE CODE
(1 digit)
FAILURE RATE
(1 digit)
PACKAGING CODE
(3 digits)
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
S = Solderable, inductive
N = Solderable, non-inductive
W = Weldable, inductive (1)
Z = Weldable, non-inductive (1)
3 digit significant figure,
followed by a multiplier
49R9 = 49.9
1000 = 100
1001 = 1000
B = ± 0.1 %
D = ± 0.5 %
F = ± 1.0 %
M = 1.0 %/1000 h
P = 0.1 %/1000 h
R = 0.01 %/1000 h
S = 0.001 %/1000 h
B12 = Bulk pack
S70 = Tape/reel
(smaller than 5 W)
S73 = Tape/reel
(5 W and higher)
BSL = Bulk pack,
single lot date code
RSL = Tape/reel,
single lot date code
74S4 R9F9WR SB1R 2
RWR Military
www.vishay.com Vishay Dale
Revision: 11-Jul-13 2Document Number: 30203
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
DIMENSIONS in inches [millimeters]
Note
(1) On some standard reel pack methods, the leads may be trimmed to a shorter length than shown.
MILITARY MODEL DIMENSIONS in inches [millimeters]
AB C
RWR81 0.250 ± 0.031 [6.35 ± 0.787] 0.085 ± 0.020 [2.16 ± 0.508] 0.020 ± 0.0015 [0.508 ± 0.038]
RWR82 0.312 ± 0.016 [7.92 ± 0.406] 0.078 + 0.016 - 0.031 [1.98 + 0.406 - 0.787] 0.020 ± 0.0015 [0.508 ± 0.038]
RWR80 0.406 ± 0.031 [10.31 ± 0.787] 0.094 ± 0.031 [2.39 ± 0.787] 0.020 ± 0.0015 [0.508 ± 0.038]
RWR71 0.812 ± 0.062 [20.62 ± 1.58] 0.187 ± 0.031 [4.75 ± 0.787] 0.032 ± 0.002 [0.813 ± 0.051]
RWR89 0.560 ± 0.062 [14.22 ± 1.58] 0.187 ± 0.031 [4.75 ± 0.787] 0.032 ± 0.002 [0.813 ± 0.051]
RWR74 0.875 ± 0.062 [22.23 ± 1.58] 0.312 ± 0.031 [7.92 ± 0.787] 0.040 ± 0.002 [1.02 ± 0.051]
RWR84 0.875 ± 0.062 [22.23 ± 1.58] 0.312 ± 0.031 [7.92 ± 0.787] 0.040 ± 0.002 [1.02 ± 0.051]
RWR78 1.780 ± 0.062 [45.21 ± 1.58] 0.375 ± 0.031 [9.525 ± 0.787] 0.040 ± 0.002 [1.02 ± 0.051]
TECHNICAL SPECIFICATIONS
PARAMETER UNIT RWR RESISTOR CHARACTERISTICS
Dielectric Withstanding Voltage VAC 500 minimum for 2 W and smaller, 1000 minimum for 3 W and larger
Short Time Overload - 5 x rated power for 5 s for 3 W size and smaller,
10 x rated power for 5 s for 5 W size and greater
Maximum Working Voltage V (P x R)1/2
Insulation Resistance . 1000 M minimum dry, 100 M minimum after moisture test
Terminal Strength lb 5 minimum for 2 W and smaller, 10 minimum for 3 W and larger
Solderability - Meets requirements of ANSI J-STD-002
Operating Temperature Range °C - 55 to + 250
RESISTANCE TEMPERATURE COEFFICIENT
TEMPERATURE
COEFFICIENT
(ppm/°C)
RWR71 RWR74 RWR78 RWR80 RWR81 RWR82 RWR84 RWR89
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
RESISTANCE
RANGE ()
+ 650 max. 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499
+ 400 max. 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0
± 50 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10
± 30 10.1 to 73.2 10.1 to 158 10.1 to 453 - - - 10.1 to 158 10.1 to 42.2
± 20 74.1
and above
160
and above
459
and above
10.1
and above
10.1
and above
10.1
and above
160
and above
42.7
and above
B
1.50 [38.10] (1)
min.
A
C
RWR Military
www.vishay.com Vishay Dale
Revision: 11-Jul-13 3Document Number: 30203
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
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
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
Terminals: Solderable - Tinned Copperweld®
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
(1) RWR82S and RWR82N: Core consists of beryllium oxide
ceramic
DERATING
Note
(2) For resistance values above 100 , test limit is ± 1.0 %.
AMBIENT TEMPERATURE IN °C
RATED POWER IN %
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 500 Vrms (RWR80, RWR81, RWR82),
1000 Vrms (RWR71, RWR74, RWR78, RWR84, RWR89), 1 min duration ± (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 ) R (2)
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
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Revision: 02-Oct-12 1Document Number: 91000
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