RWR Military
www.vishay.com
Vishay Dale
Wirewound Resistors, Military/Established Reliability,
MIL-PRF-39007 Qualified, Type RWR, Up to S 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
DESIGN SUPPORT TOOLS
• “S” level failure rate available
click logo to get started
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”
Models
Available
STANDARD ELECTRICAL SPECIFICATIONS
MILITARY MODEL
RWR81S
RWR81N
RWR82S
RWR82N
RWR80S
RWR80N
RWR71S
RWR71N
RWR89S
RWR89N
RWR74S
RWR74N
RWR84S
RWR84N
RWR78S
RWR78N
VISHAY REFERENCE
MODEL
POWER RATING
P25 °C W
EGS-1-80
EGN-1-80
EGS-2
EGN-2
EGS-3-80
EGN-3-80
ESS-2A
ESN-2A
ESS-2B
ESN-2B
ESS-5
ESN-5
EGS-10-80
EGN-10-80
ESS-10
ESN-10
1
1
1.5
1.5
2
2
2
2
3
3
5
5
7
7
10
10
RESISTANCE RANGE
± 0.1 %
0.499 to 1K
0.499 to 499
0.499 to 1.3K
0.499 to 649
0.499 to 3.16K
0.499 to 1.58K
0.499 to 12.1K
0.499 to 6.04K
0.499 to 4.12K
0.499 to 2.05K
0.499 to 12.1K
0.499 to 6.04K
0.499 to 12.4K
0.499 to 6.19K
0.499 to 39.2K
0.499 to 19.6K
RESISTANCE RANGE
± 0.5 %, ± 1 %
0.1 to 1K
0.1 to 499
0.1 to 1.3K
0.1 to 649
0.1 to 3.16K
0.1 to 1.58K
0.1 to 12.1K
0.1 to 6.04K
0.1 to 4.12K
0.1 to 2.05K
0.1 to 12.1K
0.1 to 6.04K
0.1 to 12.4K
0.1 to 6.19K
0.1 to 39.2K
0.1 to 19.6K
WEIGHT
(typical) g
0.21
0.21
0.23
0.23
0.34
0.34
0.90
0.90
0.70
0.70
4.2
4.2
3.6
3.6
9.0
9.0
Note
• RWR82S and RWR82N: Core consists of beryllium oxide ceramic
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: RWR74S49R9FSB12
R
W
R
7
4
S
4
9
R
9
F
S
B
1
2
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
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
49R9 = 49.9
1000 = 100
1001 = 1000
Notes
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
(1)
Revision: 15-Nov-17
Document Number: 30203
1
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
RWR Military
www.vishay.com
Vishay Dale
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
DIMENSIONS in inches [millimeters]
1.50 [38.10] (1)
min.
A
C
B
DIMENSIONS in inches [millimeters]
MILITARY MODEL
A
B
C
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]
RWR81
Note
(1) On some standard reel pack methods, the leads may be trimmed to a shorter length than shown
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
RWR RESISTOR CHARACTERISTICS
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
Dielectric Withstanding Voltage
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
°C
-55 to +250
Operating Temperature Range
RESISTANCE TEMPERATURE COEFFICIENT
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
TEMPERATURE
COEFFICIENT RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE
(ppm/°C)
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
RANGE ()
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
Revision: 15-Nov-17
Document Number: 30203
2
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
RWR Military
www.vishay.com
Vishay Dale
DERATING
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
RATED POWER IN %
MATERIAL SPECIFICATIONS
120
100
80
60
40
20
0
- 65 - 50
0
25
50
150
250
AMBIENT TEMPERATURE IN °C
Note
(1) RWR82S and RWR82N: Core consists of beryllium oxide
ceramic
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
High Temperature Exposure
250 °C for 2000 h
± (0.1 % + 0.005 ) R
± (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
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
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product
with the properties described in the product specification is suitable for use in a particular application. Parameters provided in
datasheets and / or specifications may vary in different applications and performance may vary over time. All operating
parameters, including typical parameters, must be validated for each customer application by the customer's technical experts.
Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited
to the warranty expressed therein.
Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and
for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of
any of the products, services or opinions of the corporation, organization or individual associated with the third-party website.
Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website
or for that of subsequent links.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please
contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2022 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 01-Jan-2022
1
Document Number: 91000