RW Military
www.vishay.com
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-26 Qualified, Type RW,
Precision Power, Silicone Coated, Axial Lead
FEATURES
•
•
•
•
High temperature coating (> 350 °C)
Complete welded construction
Qualified to MIL-PRF-26
Excellent stability in operation (typical
shift < 0.5 %)
resistance
DESIGN SUPPORT TOOLS
Models
Available
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STANDARD ELECTRICAL SPECIFICATIONS
VISHAY
POWER RATING
POWER RATING
MILITARY
REFERENCE
P
25 °C
W
P
25 °C
W
MODEL
MODEL
CHARACTERISTIC U CHARACTERISTIC V
RW81
RW70
RW80
RW79
RW69
RW74
RW67
RW78
RW68
G001...380
RS01A...300
G003...380
RS02B...300
RS02C...23
RS005...69
RS005...70
RS010...38
RS010...39
1.0
1.0
2.0
3.0
-
5.0
-
10.0
-
-
-
-
-
3.0
-
6.5
-
11.0
RESISTANCE
RANGE
± 0.1 %
0.499 to 1K
0.499 to 2.74K
0.499 to 2.74K
0.499 to 6.49K
-
0.499 to 24.3K
-
0.499 to 71.5K
-
RESISTANCE
RANGE
± 0.5 %, ± 1 %
0.1 to 1K
0.1 to 2.74K
0.1 to 2.74K
0.1 to 6.49K
-
0.1 to 24.3K
-
0.1 to 71.5K
-
RESISTANCE
RANGE
± 5 %, ± 10 %
-
-
-
-
0.1 to 2.0K
-
0.1 to 8.2K
-
0.1 to 20K
WEIGHT
(typical)
g
0.20
0.34
0.34
0.70
1.6
4.2
4.2
9.0
9.0
Note
•
RW67, RW68, RW69 available tolerance for these MIL parts is ± 5 % for 1
and above, ± 10 % below 1
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Maximum Working Voltage
Insulation Resistance
Solderability
Operating Temperature Range
UNIT
ppm/°C
V
-
°C
RW RESISTOR CHARACTERISTICS
± 20 for 10
and above, ± 50 for 1
to 9.9
,
± 90 for below 1
(P x
R)
1/2
1000 M minimum dry, 100 M minimum after moisture test
MIL-PRF-26 type - meets requirements of ANSI J-STD-002
Characteristic U = -65 to +250, characteristic V = -65 to +350
MILITARY PART NUMBER INFORMATION
Military Part Numbering example: RW80U49R9FB12
R
MIL TYPE
RW67
RW68
RW69
RW70
RW74
RW78
RW79
RW80
RW81
W
8
0
U
4
9
R
9
F
B
1
2
PACKAGING CODE
B12
= bulk pack
S70
= tape/reel
(smaller than 5 W)
S73
= tape/reel
(5 W and higher)
CHARACTERISTIC
U
= max. hotspot 275 °C
V
= max. hotspot 350 °C
RESISTANCE VALUE
U Characteristic
3 digit significant figure,
followed by a multiplier
49R9
= 49.9
1000
= 100
1001
= 1000
V Characteristic
2 digit significant figure,
followed by a multiplier
4R7
= 4.7
102
= 1000
TOLERANCE CODE
Tolerance for “U”
characteristic only
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
Tolerance for “V”
characteristic is not listed
and is as specified by
MIL-PRF-26
Revision: 15-Nov-17
Document Number: 30281
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
RW Military
www.vishay.com
DIMENSIONS
in inches [millimeters]
A
1.50
[38.10]
(1)
min.
D
C
Vishay Dale
MILITARY
MODEL
RW81
RW70
RW80
RW79
RW69
RW74
RW67
RW78
RW68
DIMENSIONS
in inches [millimeters]
A
0.250 ± 0.031
[6.35 ± 0.787]
0.406 ± 0.031
[10.31 ± 0.787]
0.560 ± 0.062
[14.22 ± 1.57]
0.500 ± 0.062
[12.70 ± 1.57]
0.875 ± 0.062
[22.23 ± 1.57]
1.78 ± 0.062
[45.21 ± 1.57]
B
(1)
(max.)
C
D
B
0.281 0.085 ± 0.020 0.020 ± 0.002
[7.14] [2.16 ± 0.508] [0.508 ± 0.051]
0.437 0.094 ± 0.031 0.020 ± 0.002
[11.10] [2.39 ± 0.787] [0.508 ± 0.051]
0.622 0.187 ± 0.031 0.032 ± 0.002
[15.80] [4.75 ± 0.787] [0.813 ± 0.051]
0.593 0.218 ± 0.031 0.032 ± 0.002
[15.06] [5.54 ± 0.787] [0.813 ± 0.051]
1.0 0.312 ± 0.031 0.040 ± 0.002
[25.4] [7.92 ± 0.787] [1.02 ± 0.051]
1.87 0.375 ± 0.031 0.040 ± 0.002
[47.50] [9.53 ± 0.787] [1.02 ± 0.051]
Note
(1)
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, steatite or alumina, depending on physical
size
Coating:
special high temperature silicone
Standard Terminals:
60/40 Sn/Pb coated Copperweld
®
End Caps:
stainless steel
1.875 + 0.063 - 0.125 1.94 0.344 ± 0.094 0.040 ± 0.002
[47.63 + 1.60 - 3.18] [49.28] [8.74 ± 2.39] [1.02 ± 0.051]
Note
(1)
B (max.) dimension is clean lead to clean lead
RATED POWER IN %
MARKING
MODELS:
RW70, RW74, RW78, RW79,
RW80, RW81
Characteristic U
Tolerance code: B = 0.1 %,
D = 0.5 %, F = 1 %
Example
Dale
RW80U Model
1001F
0703
Characteristic, value
Date code
MODELS:
RW67, RW68, RW69
Characteristic V
Tolerance code: not listed
Example
Dale
RW68
V100
Model
Characteristic, value
DERATING
120
100
80
60
CHAR. V
40
20
0
-65 -50
CHAR. U
0
25
50
150
250
350
AMBIENT TEMPERATURE IN °C
M0202 Date code
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
Terminal Strength
CONDITIONS OF TEST
Rated power applied until thermally stable, then a
minimum of 15 min at -55 °C
5x rated power (3.75 W and smaller), 10 x rated power
(4 W and larger) for 5 s
500 V
RMS
min. (RW70, RW80, RW81),
1000 V
RMS
for all others, duration of 1 min
-65 °C for 24 h
250 h at: U = +250 °C, V = +350 °C
MIL-STD-202 Method 106, 7b not applicable
MIL-STD-202 Method 213, 100
g’s
for 6 ms, 10 shocks
Frequency varied 10 Hz to 2000 Hz, 20
g
peak,
2 directions 6 h each
2000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
Pull test 5 s to 10 s, 5 lb (RW70, RW80, RW81),
10 lb for all others; torsion test - 3 alternating directions,
360° each
TEST LIMITS
CHARACTERISTIC U
± (0.2 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.1 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.1 % + 0.05
) R
± (0.1 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.1 % + 0.05
) R
CHARACTERISTIC V
± (2.0 % + 0.05
) R
± (2.0 % + 0.05
) R
± (0.1 % + 0.05
) R
± (2.0 % + 0.05
) R
± (2.0 % + 0.05
) R
± (2.0 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.2 % + 0.05
) R
± (3.0 % + 0.05
) R
± (1.0 % + 0.05
) R
Revision: 15-Nov-17
Document Number: 30281
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
Legal Disclaimer Notice
www.vishay.com
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Disclaimer
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Revision: 08-Feb-17
1
Document Number: 91000
