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 resistance
shift < 0.5 %)
click logo to get started
DESIGN SUPPORT TOOLS
Models
Available
STANDARD ELECTRICAL SPECIFICATIONS
RESISTANCE RESISTANCE RESISTANCE
VISHAY POWER RATING POWER RATING WEIGHT
RANGE RANGE RANGE
MILITARY
REFERENCE P W P W (typical)
25 C 25 C
MODEL
MODEL CHARACTERISTIC U CHARACTERISTIC V g
0.1 % 0.5 %, 1 % 5 %, 10 %
RW81 G001...380 1.0 - 0.499 to 1K 0.1 to 1K - 0.20
RW70 RS01A...300 1.0 - 0.499 to 2.74K 0.1 to 2.74K - 0.34
RW80 G003...380 2.0 - 0.499 to 2.74K 0.1 to 2.74K - 0.34
RW79 RS02B...300 3.0 - 0.499 to 6.49K 0.1 to 6.49K - 0.70
RW69 RS02C...23 - 3.0 - - 0.1 to 2.0K 1.6
RW74 RS005...69 5.0 - 0.499 to 24.3K 0.1 to 24.3K - 4.2
RW67 RS005...70 - 6.5 - - 0.1 to 8.2K 4.2
RW78 RS010...38 10.0 - 0.499 to 71.5K 0.1 to 71.5K - 9.0
RW68 RS010...39 - 11.0 - - 0.1 to 20K 9.0
Note
RW67, RW68, RW69 available tolerance for these MIL parts is 5 % for 1 and above, 10 % below 1
TECHNICAL SPECIFICATIONS
PARAMETER UNIT RW RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/C 20 for 10 and above, 50 for 1 to 9.9 , 90 for below 1
1/2
Maximum Working Voltage V (P x R)
Insulation Resistance 1000 M minimum dry, 100 M minimum after moisture test
Solderability - MIL-PRF-26 type - meets requirements of ANSI J-STD-002
Operating Temperature Range C Characteristic U = -65 to +250, characteristic V = -65 to +350
MILITARY PART NUMBER INFORMATION
Military Part Numbering example: RW80U49R9FB12
RW 8 0 U4 9 R9 F B1 2
MIL TYPE CHARACTERISTIC RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE
RW67 U = max. hotspot 275 C U Characteristic Tolerance for U B12 = bulk pack
RW68 V = max. hotspot 350 C 3 digit significant figure, characteristic only S70 = tape/reel
RW69 followed by a multiplier B = 0.1 % (smaller than 5 W)
RW70 49R9 = 49.9 D = 0.5 % S73 = tape/reel
RW74 1000 = 100 F = 1.0 % (5 W and higher)
RW78 1001 = 1000
RW79 Tolerance for V
V Characteristic
RW80 characteristic is not listed
2 digit significant figure,
RW81 and is as specified by
followed by a multiplier
MIL-PRF-26
4R7 = 4.7
102 = 1000
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
Vishay Dale
DIMENSIONS in inches [millimeters]
DIMENSIONS in inches [millimeters]
MILITARY
1.50
A (1)
B
(1)
MODEL
[38.10] A CD
(max.)
min.
0.250 0.031 0.281 0.085 0.020 0.020 0.002
RW81
[6.35 0.787] [7.14] [2.16 0.508] [0.508 0.051]
D
B
C
RW70 0.406 0.031 0.437 0.094 0.031 0.020 0.002
RW80 [10.31 0.787] [11.10] [2.39 0.787] [0.508 0.051]
Note
(1)
On some standard reel pack methods, the leads may be
0.560 0.062 0.622 0.187 0.031 0.032 0.002
RW79
trimmed to a shorter length than shown
[14.22 1.57] [15.80] [4.75 0.787] [0.813 0.051]
0.500 0.062 0.593 0.218 0.031 0.032 0.002
RW69
MATERIAL SPECIFICATIONS
[12.70 1.57] [15.06] [5.54 0.787] [0.813 0.051]
Element: copper-nickel alloy or nickel-chrome alloy,
RW74 0.875 0.062 1.0 0.312 0.031 0.040 0.002
depending on resistance value
RW67 [22.23 1.57] [25.4] [7.92 0.787] [1.02 0.051]
Core: ceramic, steatite or alumina, depending on physical 1.78 0.062 1.87 0.375 0.031 0.040 0.002
RW78
[45.21 1.57] [47.50] [9.53 0.787] [1.02 0.051]
size
1.875 + 0.063 - 0.125 1.94 0.344 0.094 0.040 0.002
Coating: special high temperature silicone
RW68
[47.63 + 1.60 - 3.18] [49.28] [8.74 2.39] [1.02 0.051]
Standard Terminals: 60/40 Sn/Pb coated Copperweld
Note
End Caps: stainless steel
(1)
B (max.) dimension is clean lead to clean lead
DERATING
MARKING
120
MODELS:
MODELS:
RW70, RW74, RW78, RW79, 100
RW67, RW68, RW69
RW80, RW81
80
Characteristic U Characteristic V
Tolerance code: B = 0.1 %,
Tolerance code: not listed
60
D = 0.5 %, F = 1 %
CHAR. V
40
Example Example
Dale Dale
20
CHAR. U
RW80U Model RW68 Model
1001F Characteristic, value V100 Characteristic, value 0
-65 -50 0 50 150 250 350
0703 Date code M0202 Date code 25
AMBIENT TEMPERATURE IN C
PERFORMANCE
TEST LIMITS
TEST CONDITIONS OF TEST
CHARACTERISTIC U CHARACTERISTIC V
Rated power applied until thermally stable, then a
Thermal Shock (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R
minimum of 15 min at -55 C
5x rated power (3.75 W and smaller), 10 x rated power
Short Time Overload (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R
(4 W and larger) for 5 s
Dielectric Withstanding 500 V min. (RW70, RW80, RW81),
RMS
(0.1 % + 0.05 ) R (0.1 % + 0.05 ) R
Voltage 1000 V for all others, duration of 1 min
RMS
Low Temperature Storage -65 C for 24 h (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R
High Temperature Exposure 250 h at: U = +250 C, V = +350 C (0.5 % + 0.05 ) R (2.0 % + 0.05 ) R
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R
Shock, Specified Pulse MIL-STD-202 Method 213, 100 gs for 6 ms, 10 shocks (0.1 % + 0.05 ) R (0.2 % + 0.05 ) R
Frequency varied 10 Hz to 2000 Hz, 20 g peak,
Vibration, High Frequency (0.1 % + 0.05 ) R (0.2 % + 0.05 ) R
2 directions 6 h each
Load Life 2000 h at rated power, +25 C, 1.5 h ON, 0.5 h OFF (0.5 % + 0.05 ) R (3.0 % + 0.05 ) R
Pull test 5 s to 10 s, 5 lb (RW70, RW80, RW81),
Terminal Strength 10 lb for all others; torsion test - 3 alternating directions, (0.1 % + 0.05 ) R (1.0 % + 0.05 ) R
360 each
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
RATED POWER IN %