ESS, ESN, EGS, EGN
Wirewound Resistors, Military/Established Reliability
Vishay Dale
MIL-PRF-39007 Qualified, Type RWR, R Level
DIMENSIONS in inches [millimeters]
MIL-PRF-39007
MODEL
DIMENSIONS in inches [millimeters]
.ꢀ50 [38ꢀ.0] (.)
A
B
C
A
minꢀ
0.250 0.031
[6.35 0.787]
0.085 0.020
[2.16 0.508]
0.020 0.0015
[0.508 0.038]
RWR8.
RWR82
RWR80
RWR7.
RWR89
RWR74
RWR84
C
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]
B
Note
(1)
0.406 0.031
[10.31 0.787]
0.094 0.031
[2.39 0.787]
0.020 0.0015
[0.508 0.038]
On some standard reel pack methods, the leads may be trimmed
to a shorter length than shown
0.812 0.062
[20.62 1.58]
0.187 0.031
[4.75 0.787]
0.032 0.002
[0.813 0.051]
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
0.560 0.062
[14.22 1.58]
0.187 0.031
[4.75 0.787]
0.032 0.002
[0.813 0.051]
0.875 0.062
[22.23 1.58]
0.312 0.031
[7.92 0.787]
0.040 0.002
[1.02 0.051]
0.875 0.062
[22.23 1.58]
0.312 0.031
[7.92 0.787]
0.040 0.002
[1.02 0.051]
1.780 0.062
[45.21 1.58]
0.312 0.031
[7.92 0.787]
0.040 0.002
[1.02 0.051]
RWR78
120
N = Solderable, non-inductively wound
Z = Weldable, non-inductively wound
100
Terminals: Solderable - Tinned Copperweld®
Weldable - bare nickel per MIL-STD-1276, Type N-1
80
60
40
20
End Caps: Stainless steel
Part Marking: Source code, JAN, military PIN, date/lot code
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
- 65- 50
0
50
150
250
25
AMBIENT TEMPERATURE IN °C
Derating
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
VAC
-
Dielectric Withstanding Voltage
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
Short Time Overload
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
Operating Temperature Range
V
.
lb
-
(P x R)1/2
1000 MΩ minimum dry, 100 MΩ minimum after moisture test
5 minimum for 2 W and smaller, 10 minimum for 3 W and larger
Meets requirements of ANSI J-STD-002
- 65 to + 250
°C
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal Shock
Short Time Overload
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
(0.2 ꢀ + 0.005
(0.2 ꢀ + 0.005
Ω
Ω
)
)
Δ
Δ
R
R
Dielectric Withstanding
Voltage
500 Vrms (RWR80, 81, 82), 1000 Vrms (RWR71, 74, 78, 84, 89),
1 min duration
(0.1 ꢀ + 0.005
Ω)
ΔR
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
- 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”
(0.1 ꢀ + 0.005
(1.0 ꢀ + 0.005
(0.2 ꢀ + 0.005
(0.1 ꢀ + 0.005
(0.1 ꢀ + 0.005
(0.5 ꢀ + 0.005
(1.0 ꢀ + 0.005
Ω)
Ω)
Ω)
Ω)
Ω)
Ω)
Ω)
ΔR
ΔR
ΔR
ΔR
ΔR
ΔR
ΔR
Extended Life
MIL-STD-202, Method 211, condition A and C
5 pound (RWR80, 81, 82), 10 pound (RWR71, 74, 78, 84, 89)
Terminal Strength
(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
5秒后页面跳转
NTC热敏电阻与PTC热敏电阻的应用原理及应用范围
GTO与普通晶闸管相比为什么可以自关断？为什么普通晶闸管不能呢？从GTO原理、应用范围带你了解原因及推荐型号
LF353数据手册解读：特性、应用、封装、引脚说明、电气参数及替换型号推荐
A4950资料手册解读：特性、应用、封装、引脚功能、电气参数及代换型号
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
