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RWR Military

www.vishay.com Vishay Dale

Revision: 15-Nov-17 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, Up to S Level, Axial Lead

DESIGN SUPPORT TOOLS

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

Notes

(1) Note that “W” and “Z” are not listed above but are available, see MIL-PRF-39007 QPL for available resistance values

(2) Maximum order sizes apply for single lot date code package codes, please see table below

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Available

Models

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 1.5 0.499 to 1.3K 0.1 to 1.3K 0.23

RWR82N EGN-2 1.5 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

(500 pieces)

BSL (2) = bulk pack,

single lot date code

RSL (2) = tape/reel,

single lot date code

74S4 R9F9WR SB1R 2

RWR Military

www.vishay.com Vishay Dale

Revision: 15-Nov-17 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

MAXIMUM ORDER SIZE FOR SINGLE LOT DATE CODE PACKAGE CODES

MODEL MAXIMUM ORDER SIZE (PIECES)

RWR81 1000

RWR82 1000

RWR80 1000

RWR71 500

RWR89 1000

RWR74 500

RWR84 300

RWR78 300

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 - 5x rated power for 5 s for 3 W size and smaller,

10x 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

1.50 [38.10] (1)

min.

RWR Military

www.vishay.com Vishay Dale

Revision: 15-Nov-17 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

(1) For resistance values above 100 , test limit is ± 1.0 %

AMBIENT TEMPERATURE IN °C

RATED POWER IN %

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 5x 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 (1)

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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www.vishay.com Vishay

Revision: 08-Feb-17 1Document Number: 91000

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