RWR Military
www.vishay.com Vishay Dale
Revision: 12-Sep-11 1Document Number: 30203
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
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 Aryton-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
(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
TECHNICAL SPECIFICATIONS
PARAMETER UNIT RWR RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/°C ± 20 for 10 and above; ± 50 for 1.1 to 10 ; ± 400 for 0.505 to 1 ; ± 650 for 0.1 to 0.499
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 - 65 to + 250
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: RWR74S49R9FSB12
MIL TYPE TERMINAL WIRE AND WINDING RESISTANCE VALUE TOLERANCE CODE FAILURE RATE PACKAGING CODE
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: 12-Sep-11 2Document Number: 30203
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
DIMENSIONS in inches [millimeters]
Note
(1) On some standard reel pack methods, the leads may be trimmed to a shorter length than shown.
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core: Ceramic, beryllium oxide, 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
DERATING
Note
(2) For resistance values above 100 , test limit is ± 1.0 %.
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] 0.312 ± 0.031 [7.92 ± 0.787] 0.040 ± 0.002 [1.02 ± 0.051]
B
1.50 [38.10] (1)
min.
A
C
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-2.2, method 303 ± (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 - 65 °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 1 ± (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
Document Number: 91000 www.vishay.com
Revision: 11-Mar-11 1
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