ESS, ESN, EGS, 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
•
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”
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
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
MIL-PRF-39007
TYPE
RWR81S
RWR81N
RWR82S
RWR82N
RWR80S
RWR80N
RWR71S
RWR71N
RWR89S
RWR89N
RWR74S
RWR74N
RWR84S
RWR84N
RWR78S
RWR78N
POWER RATING
P
25 °C
W
1
1
2
2
2
2
2
2
3
3
5
5
7
7
10
10
MILITARY RESISTANCE RANGE
Ω
± 0.1 %
0.499 - 1K
0.499 - 499
0.499 - 1.3K
0.499 - 649
0.499 - 3.16K
0.499 - 1.58K
0.499 - 12.1K
0.499 - 6.04K
0.499 - 4.12K
0.499 - 2.05K
0.499 - 12.1K
0.499 - 6.04K
0.499 - 12.4K
0.499 - 6.19K
0.499 - 39.2K
0.499 - 19.6K
± 0.5 % and ± 1 %
0.1 - 1K
0.1 - 499
0.1 - 1.3K
0.1 - 649
0.1 - 3.16K
0.1 - 1.58K
0.1 - 12.1K
0.1 - 6.04K
0.1 - 4.12K
0.1 - 2.05K
0.1 - 12.1K
0.1 - 6.04K
0.1 - 12.4K
0.1 - 6.19K
0.1 - 39.2K
0.1 - 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
GLOBAL PART NUMBER INFORMATION
Global/Military Part Numbering: RWR74S49R9FSB12
R
W
R
7
4
S
4
9
R
9
F
S
B
1
2
MIL TYPE
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
TERMINAL WIRE
AND WINDING
S
= Solderable, inductive
N
= Solderable, noninductive
W
= Weldable, inductive
(1)
Z
= Weldable, noninductive
(1)
RESISTANCE VALUE
3 digit significant figure,
followed by a multiplier
49R9
= 49.9
Ω
1000
= 100
Ω
1001
= 1000
Ω
TOLERANCE
CODE
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
FAILURE RATE
M
= 1.0 %/1000 h
P
= 0.1 %/1000 h
R
= 0.01 %/1000 h
S
= 0.001 %/1000 h
PACKAGING CODE
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
Note
(1)
Note that “W” and “Z” are not listed above but are available, see MIL-PRF-39007 QPL for available resistance values
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158
For technical questions, contact: ww2bresistors@vishay.com
document number: 30203
Revision: 22-Oct-08
ESS, ESN, EGS, EGN
Wirewound Resistors, Military/Established Reliability
MIL-PRF-39007 Qualified, Type RWR, R Level
DIMENSIONS
in inches [millimeters]
A
1.50 [38.10]
(1)
min.
Vishay Dale
MIL-PRF-39007
MODEL
RWR81
Note
(1)
On some standard reel pack methods, the leads may be trimmed
to a shorter length than shown
B
C
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
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
DIMENSIONS
in inches [millimeters]
A
B
C
0.250 ± 0.031
0.085 ± 0.020
0.020 ± 0.0015
[6.35 ± 0.787]
[2.16 ± 0.508]
[0.508 ± 0.038]
0.312 ± 0.016 0.078 + 0.016 - 0.031 0.020 ± 0.0015
[7.92 ± 0.406] [1.98 + 0.406 - 0.787] [0.508 ± 0.038]
0.406 ± 0.031
0.094 ± 0.031
0.020 ± 0.0015
[10.31 ± 0.787]
[2.39 ± 0.787]
[0.508 ± 0.038]
0.812 ± 0.062
0.187 ± 0.031
0.032 ± 0.002
[20.62 ± 1.58]
[4.75 ± 0.787]
[0.813 ± 0.051]
0.560 ± 0.062
0.187 ± 0.031
0.032 ± 0.002
[14.22 ± 1.58]
[4.75 ± 0.787]
[0.813 ± 0.051]
0.875 ± 0.062
0.312 ± 0.031
0.040 ± 0.002
[22.23 ± 1.58]
[7.92 ± 0.787]
[1.02 ± 0.051]
0.875 ± 0.062
0.312 ± 0.031
0.040 ± 0.002
[22.23 ± 1.58]
[7.92 ± 0.787]
[1.02 ± 0.051]
1.780 ± 0.062
0.312 ± 0.031
0.040 ± 0.002
[45.21 ± 1.58]
[7.92 ± 0.787]
[1.02 ± 0.051]
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
150
250
Derating
AMBIENT TEMPERATURE IN °C
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
RWR RESISTOR CHARACTERISTICS
Temperature Coefficient
ppm/°C ± 650 for 0.1
Ω
to 0.499
Ω,
± 400 for 0.505
Ω
to 1
Ω,
± 50 for 1.1
Ω
to 10
Ω,
± 20 for 10
Ω
and above
V
AC
500 minimum for 2 W and smaller, 1000 minimum for 3 W and larger
Dielectric Withstanding Voltage
5 x rated power for 5 s for 3 W size and smaller,
Short Time Overload
-
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 MΩ minimum dry, 100 MΩ 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
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 s
500 V
rms
(RWR80, 81, 82), 1000 V
rms
(RWR71, 74, 78, 84, 89),
1 min duration
- 65 °C for 24 h
250 °C for 2000 h
MIL-STD-202, Method 106
MIL-STD-202, Method 205, condition C
MIL-STD-202, Method 204, condition D
2000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF”
10 000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “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 % + 0.005
Ω) ΔR
± (0.2 % + 0.005
Ω) ΔR
± (0.1 % + 0.005
Ω) ΔR
± (0.1 % + 0.005
Ω) ΔR
± (1.0 % + 0.005
Ω) ΔR
± (0.2 % + 0.005
Ω) ΔR
± (0.1 % + 0.005
Ω) ΔR
± (0.1 % + 0.005
Ω) ΔR
± (0.5 % + 0.005
Ω) ΔR
± (1.0 % + 0.005
Ω) ΔR
± (0.1 % + 0.005
Ω) ΔR
Note
• For resistance values above 100
Ω,
test limit is ± 1.0 %
document number: 30203
Revision: 22-Oct-08
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
159
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Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
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Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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