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 %) STANDARD ELECTRICAL SPECIFICATIONS VISHAY POWER RATING POWER RATING RESISTANCE WEIGHT MILITARY TOLERANCE REFERENCE P W P W RANGE (typical) 25 C 25 C MODEL % MODEL CHARACTERISTIC U CHARACTERISTIC V g RW81 G001...380 1.0 - 0.1 to 1K 0.1, 0.5, 1 0.20 RW70 RS01A...300 1.0 - 0.1 to 2.74K 0.1, 0.5, 1 0.34 RW80 G003...380 2.0 - 0.1 to 2.74K 0.1, 0.5, 1 0.34 RW79 RS02B...300 3.0 - 0.1 to 6.49K 0.1, 0.5, 1 0.70 RW69 RS02C...23 - 3.0 0.1 to 2.0K 5, 10 1.6 RW74 RS005...69 5.0 - 0.1 to 24.3K 0.1, 0.5, 1 4.2 RW67 RS005...70 - 6.5 0.1 to 8.2K 5, 10 4.2 RW78 RS010...38 10.0 - 0.1 to 71.5K 0.1, 0.5, 1 9.0 RW68 RS010...39 - 11.0 0.1 to 20K 5, 10 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 Characterisitic 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: 23-May-13 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 A 1.50 MILITARY (2) (1) B 38.10 MODEL A CD min. (max.) 0.250 0.031 0.281 0.085 0.020 0.020 0.002 RW81 D 6.35 0.787 7.14 2.16 0.508 0.508 0.051 B C RW70 0.406 0.031 0.437 0.094 0.031 0.020 0.002 Note RW80 10.31 0.787 11.10 2.39 0.787 0.508 0.051 (1) On some standard reel pack methods, the leads may be trimmed to a shorter length than shown 0.560 0.062 0.622 0.187 0.031 0.032 0.002 RW79 14.22 1.57 15.80 4.75 0.787 0.813 0.051 MATERIAL SPECIFICATIONS 0.500 0.062 0.593 0.218 0.031 0.032 0.002 RW69 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 size RW78 45.21 1.57 47.50 9.53 0.787 1.02 0.051 Coating: Special high temperature silicone 1.875 + 0.063 - 0.125 1.94 0.344 0.094 0.040 0.002 RW68 Standard Terminals: 60/40 Sn/Pb coated Copperweld 47.63 + 1.60 - 3.18 49.28 8.74 2.39 1.02 0.051 End Caps: Stainless steel Note (2) B (max.) dimension is clean lead to clean lead MARKING DERATING 120 MODELS: MODELS: RW70, RW74, RW78, RW79, RW67, RW68, RW69 100 RW80, RW81 Characteristic U Characteristic V 80 Tolerance code: B = 01 %, Tolerance code: Not listed D = 0.5 %, F = 1 % 60 CHAR. V Example Example 40 Dale Dale 20 RW80U Model RW68 Model CHAR. U 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 5 x 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, 2 Vibration, High Frequency (0.1 % + 0.05 ) R (0.2 % + 0.05 ) R 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: 23-May-13 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 R A T E D P O W E R I N %