ESS, ESW, ESN, EGS, EGW, EGN
Vishay Dale
Wirewound Resistors, Military/Established Reliability
MIL-PRF-39007 Qualified, Type RWR, R Level
FEATURES
• High temperature silicone coated
• Complete welded construction
•
Qualified to MIL-PRF-39007
•
Available in non-inductive styles (types ESN and EGN) with
Aryton-Perry winding for lowest reactive components
• “S” level failure rate available
STANDARD ELECTRICAL SPECIFICATIONS
MIL-PRF-39007
MODEL
EGS-1-80
EGW-1
EGN-1-80
EGN-1-10
EGS-2
EGW-2
EGN-2
EGN-2-10
EGS-3-80
EGW-3
EGN-3-80
EGN-3-10
ESS-2A
ESW-2A
ESN-2A
ESN-2A-10
ESS-2B
ESW-2B
ESN-2B
ESN-2B-10
ESS-5
ESW-5
ESN-5
ESN-5-10
EGS-10-80
EGW-10
EGN-10-80
EGN-10-10
ESS-10
ESW-10
ESN-10
ESN-10-10
TYPE
RWR81S
RWR81W
RWR81N
RWR81Z
RWR82S
RWR82W
RWR82N
RWR82Z
RWR80S
RWR80W
RWR80N
RWR80Z
RWR71S
RWR71W
RWR71N
RWR71Z
RWR89S
RWR89W
RWR89N
RWR89Z
RWR74S
RWR74W
RWR74N
RWR74Z
RWR84S
RWR84W
RWR84N
RWR84Z
RWR78S
RWR78W
RWR78N
RWR78Z
POWER RATING
P
25
°
C
W
1
1
1
1
1.5
1.5
1.5
1.5
2
2
2
2
2
2
2
2
3
3
3
3
5
5
5
5
7
7
7
7
10
10
10
10
MILITARY RANGE
Ω
±
0.1%
0.499 - 1k
0.499 - 1k
0.499 - 499
0.499 - 499
0.499 - 1.3k
0.499 - 1.3k
0.499 - 649
0.499 - 649
0.499 - 3.16k
0.499 - 3.16k
0.499 - 1.58k
0.499 - 1.58k
0.499 - 12.1k
0.499 - 12.1k
0.499 - 6.04k
0.499- 6.04k
0.499 - 4.12k
0.499 - 4.12k
0.499 - 2.05k
0.499 - 2.05k
0.499 - 12.1k
0.499 - 12.1k
0.499 - 6.04k
0.499 - 6.04k
0.499 - 12.4k
0.499 - 12.4k
0.499- 6.19k
0.499- 6.19k
0.499 - 39.2k
0.499 - 39.2k
0.499- 19.6k
0.499- 19.6k
±
0.5 &
±
1%
0.1 - 1k
0.1 - 1k
0.1 - 499
0.1 - 499
0.1 - 1.3k
0.1 - 1.3k
0.1 - 649
0.1 - 649
0.1 - 3.16k
0.1 - 3.16k
0.1 - 1.58k
0.1 - 1.58k
0.1 - 12.1k
0.1 - 12.1k
0.1 - 6.04k
0.1 - 6.04k
0.1 - 4.12k
0.1 - 4.12k
0.1 - 2.05k
0.1 - 2.05k
0.1 - 12.1k
0.1 - 12.1k
0.1 - 6.04k
0.1 - 6.04k
0.1 - 12.4k
0.1 - 12.4k
0.1 - 6.19k
0.1 - 6.19k
0.1 - 39.2k
0.1 - 39.2k
0.1 - 19.6k
0.1 - 19.6k
WEIGHT
(Typical)
g
0.21
0.21
0.21
0.21
0.23
0.23
0.23
0.23
0.34
0.34
0.34
0.34
0.90
0.90
0.90
0.90
0.70
0.70
0.70
0.70
4.2
4.2
4.2
4.2
3.6
3.6
3.6
3.6
9.0
9.0
9.0
9.0
ORDERING INFORMATION
RWR74
MILITARY
TYPE
S
TERMINAL WIRE
AND WINDING
49R9
RESISTANCE
F
TOLERANCE
M
FAILURE
RATE
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126
For technical questions, contact ww2bresistors@vishay.com
Document Number 30203
Revision 23-Sep-02
ESS, ESW, ESN, EGS, EGW, EGN
Wirewound Resistors, Military/Established Reliability
MIL-PRF-39007 Qualified, Type RWR, R Level
DIMENSIONS
A
1.50 [38.10]*
Min.
Vishay Dale
MIL-PRF-39007
MODEL
RWR81
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
DIMENSIONS -
in inches [millimeters]
A
0.250
±
0.031
[6.35
±
0.787]
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]
B
.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]
0.375
±
0.031
[9.53
±
0.787]
C
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]
B
C
*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
RATED POWER IN %
120
100
80
60
40
20
0
-65-50
APPLICABLE MIL-SPECIFICATION
MIL-PRF-39007:
This is the military specification
covering axial lead established reliability power
wirewound resistors.
Vishay Dale ESS, ESW, EGS, EGW, ESN and EGN
resistors meet or exceed the electrical, environmental
and dimensional requirements of this specification.
0
25
50
Derating
150
250
AMBIENT TEMPERATURE IN
°
C
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Dielectric Withstanding Voltage
Short Time Overload
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
Operating Temperature Range
UNIT
ppm/°C
V
AC
-
V
Ω
lb
-
°C
ESS, ESW, ESN, EGS, EGW, EGN RESISTOR CHARACTERISTICS
±
650 for 0.1Ω to 0.499Ω,
±
400 for 0.505Ω to 1Ω,
±
50 for 1.1Ω to 10Ω,
±
20 for 10Ω and above
500 minimum for 2 watt and smaller, 1000 minimum for 3 watt and larger
5 x rated power for 5 seconds for 3 watt size and smaller,
10 x rated power for 5 seconds for 5 watt size and greater
(P x R)
1/2
1000 Megohm minimum dry, 100 Megohm minimum after moisture test
5 minimum for 2 watt and smaller, 10 minimum for 3 watt and larger
Meets requirements of ANSI J-STD-002
- 65/+ 250
PERFORMANCE
TEST
Thermal Shock
Short Time Overload
Dielectric Withstanding Voltage
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
Extended Life
Terminal Strength
CONDITIONS OF TEST
MIL-STD-2.2, Method 303
5 x rated power (RWR71, 80, 81, 89, 82), 10 x rated power (RWR74, 78, 84) for 5 seconds
500Vrms (RWR80, 81, 82), 1000Vrms (RWR71, 74, 78, 84, 89), 1 minute duration
- 65°C for 24 hours
250°C for 2000 hours
MIL-STD-202, Method 106
MIL-STD-202, Method 205, Condition C
MIL-STD-202, Method 204, Condition D
2000 hours at rated power, + 25°C, 1.5 hours “ON”, 0.5 hours “OFF”
10,000 hours at rated power, + 25°C, 1.5 hours “ON”, 0.5 hours “OFF”
MIL-STD-202, Method 211, Condition A and C
5 pound (RWR80, 81, 82), 10 pound (RWR71, 74, 78, 84, 89)
TEST LIMITS
±
(0.2% + 0.005Ω)
∆R
±
(0.2% + 0.005Ω)
∆R
±
(0.1% + 0.005Ω)
∆R
±
(0.1% + 0.005Ω)
∆R
±
(1.0% + 0.005Ω)
∆R*
±
(0.2% + 0.005Ω)
∆R
±
(0.1% + 0.005Ω)
∆R
±
(0.1% + 0.005Ω)
∆R
±
(0.5% + 0.005Ω)
∆R
±
(1.0% + 0.005Ω)
∆R
±
(0.1% + 0.005Ω)
∆R
*For resistance values above 100 ohms, Test Limit is
±
1.0%.
Document Number 30203
Revision 23-Sep-02
For technical questions, contact ww2bresistors@vishay.com
www.vishay.com
127
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Vishay
Notice
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or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
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or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
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