C&H Technology EGN User Manual
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 RWR81S 1 0.499 - 1K 0.1 - 1K 0.21
EGN-1-80 RWR81N 1 0.499 - 499 0.1 - 499 0.21
EGS-2 RWR82S 2 0.499 - 1.3K 0.1 - 1.3K 0.23
EGN-2 RWR82N 2 0.499 - 649 0.1 - 649 0.23
EGS-3-80 RWR80S 2 0.499 - 3.16K 0.1 - 3.16K 0.34
EGN-3-80 RWR80N 2 0.499 - 1.58K 0.1 - 1.58K 0.34
ESS-2A RWR71S 2 0.499 - 12.1K 0.1 - 12.1K 0.90
ESN-2A RWR71N 2 0.499 - 6.04K 0.1 - 6.04K 0.90
ESS-2B RWR89S 3 0.499 - 4.12K 0.1 - 4.12K 0.70
ESN-2B RWR89N 3 0.499 - 2.05K 0.1 - 2.05K 0.70
ESS-5 RWR74S 5 0.499 - 12.1K 0.1 - 12.1K 4.2
ESN-5 RWR74N 5 0.499 - 6.04K 0.1 - 6.04K 4.2
EGS-10-80 RWR84S 7 0.499 - 12.4K 0.1 - 12.4K 3.6
EGN-10-80 RWR84N 7 0.499 - 6.19K 0.1 - 6.19K 3.6
ESS-10 RWR78S 10 0.499 - 39.2K 0.1 - 39.2K 9.0
ESN-10 RWR78N 10 0.499 - 19.6K 0.1 - 19.6K 9.0
MIL-PRF-39007
TYPE
POWER RATING
P
W
25 °C
MILITARY RESISTANCE RANGE Ω
± 0.1 % ± 0.5 % and ± 1 %
WEIGHT
(typical) g
GLOBAL PART NUMBER INFORMATION
Global/Military Part Numbering: RWR74S49R9FSB12
74S4 R9F9WR SB1R 2
MIL TYPE
RWR71
RWR74
RWR78
RWR80
RWR81
RWR82
RWR84
RWR89
Note
(1)
Note that “W” and “Z” are not listed above but are available, see MIL-PRF-39007 QPL for available resistance values
www.vishay.com For technical questions, contact: ww2bresistors@vishay.com
158 Revision: 22-Oct-08
TERMINAL WIRE
AND WINDING
S = Solderable, inductive
N = Solderable, noninductive
W = Weldable, inductive
Z = Weldable, noninductive
RESISTANCE VALUE
3 digit significant figure,
(1)
followed by a multiplier
(1)
49R9 = 49.9 Ω
1000 = 100 Ω
1001 = 1000 Ω
TOLERANCE
CODE
B = ± 0.1 %
D = ± 0.5 %
F = ± 1.0 %
FAILURE RATE PACKAGING CODE
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
document number: 30203
ESS, ESN, EGS, EGN
Wirewound Resistors, Military/Established Reliability
MIL-PRF-39007 Qualified, Type RWR, R Level
DIMENSIONS in inches [millimeters]
A
Note
(1)
On some standard reel pack methods, the leads may be trimmed
to a shorter length than shown
B
1.50 [38.10]
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
APPLICABLE MIL-SPECIFICATION
MIL-PRF-39007:
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.
This is the military specification covering
(1)
min.
C
®
Vishay Dale
MIL-PRF-39007 DIMENSIONS
MODEL A B C
RWR81
RWR82
RWR80
RWR71
RWR89
RWR74
RWR84
RWR78
120
100
80
60
RATED POWER IN %
40
20
0
- 65 - 50 0 50 150 250
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]
25
Derating
in inches [millimeters]
0.085 ± 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]
0.312 ± 0.031
[7.92 ± 0.787]
AMBIENT TEMPERATURE IN °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]
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
Dielectric Withstanding Voltage
Short Time Overload -
Maximum Working Voltage V (P x R)
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
V
AC
500 minimum for 2 W and smaller, 1000 minimum for 3 W and larger
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
1/2
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
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
Note
• For resistance values above 100 Ω, test limit is ± 1.0 %
document number: 30203 For technical questions, contact: ww2bresistors@vishay.com
Revision: 22-Oct-08 159
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
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)
(RWR80, 81, 82), 1000 V
rms
(RWR71, 74, 78, 84, 89),
rms
± (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
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