rwr military www.vishay.com vishay dale revision: 14-jul-16 1 document number: 30203 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 wirewound resistors, military/established reliability, mil-prf-39007 qualified, type rw r, up to s level, axial lead features ? high temperature silicone coated ? complete welded construction ? qualified to mil-prf-39007 ? available in non-inductive styles (type n) with ayrton-perry winding for lo west 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 f ailure rate and resistance tolerance/ranges note ? rwr82s and rwr82n: core consists of beryllium oxide ceramic notes (1) note that w and z are not listed above but are available, see mil-prf-3 9007 qpl for available resistance values. (2) maximum order sizes apply for single lot date code package codes, pl ease see table below. standard electrical specifications military model vishay reference model power rating p 25 c w resistance range ? resistance range ? weight (typical) g 0.1 % 0.5 %, 1 % rwr81s egs-1-80 1 0.499 to 1k 0.1 to 1k 0.21 RWR81N egn-1-80 1 0.499 to 499 0.1 to 499 0.21 rwr82s egs-2 1.5 0.499 to 1.3k 0.1 to 1.3k 0.23 rwr82n egn-2 1.5 0.499 to 649 0.1 to 649 0.23 rwr80s egs-3-80 2 0.499 to 3.16k 0.1 to 3.16k 0.34 rwr80n egn-3-80 2 0.499 to 1.58k 0.1 to 1.58k 0.34 rwr71s ess-2a 2 0.499 to 12.1k 0.1 to 12.1k 0.90 rwr71n esn-2a 2 0.499 to 6.04k 0.1 to 6.04k 0.90 rwr89s ess-2b 3 0.499 to 4.12k 0.1 to 4.12k 0.70 rwr89n esn-2b 3 0.499 to 2.05k 0.1 to 2.05k 0.70 rwr74s ess-5 5 0.499 to 12.1k 0.1 to 12.1k 4.2 rwr74n esn-5 5 0.499 to 6.04k 0.1 to 6.04k 4.2 rwr84s egs-10-80 7 0.499 to 12.4k 0.1 to 12.4k 3.6 rwr84n egn-10-80 7 0.499 to 6.19k 0.1 to 6.19k 3.6 rwr78s ess-10 10 0.499 to 39.2k 0.1 to 39.2k 9.0 rwr78n esn-10 10 0.499 to 19.6k 0.1 to 19.6k 9.0 global part number information global part numbering example: rwr74s49r9fsb12 mil type (5 digits) terminal wire and winding (1 digit) resistance value (4 digits) tolerance code (1 digit) failure rate (1 digit) packaging code (3 digits) rwr71 rwr74 rwr78 rwr80 rwr81 rwr82 rwr84 rwr89 s = solderable, inductive n = solderable, non-inductive w = weldable, inductive (1) z = weldable, non-inductive (1) 3 digit significant figure, followed by a multiplier 49r9 = 49.9 ? 1000 = 100 ? 1001 = 1000 ? b = 0.1 % d = 0.5 % f = 1.0 % 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 (500 pieces) bsl (2) = bulk pack, single lot date code rsl (2) = tape/reel, single lot date code 74s4 r9f 9 wr sb1 r 2
rwr military www.vishay.com vishay dale revision: 14-jul-16 2 document number: 30203 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 dimensions in inches [millimeters] note (1) on some standard reel pack methods, the leads may be trimmed to a shor ter length than shown. maximum order size for single lot date code package codes model maximum order size (pieces) rwr81 1000 rwr82 1000 rwr80 1000 rwr71 500 rwr89 1000 rwr74 500 rwr84 300 rwr78 300 military model dimensions in inches [millimeters] ab c rwr81 0.250 0.031 [6.35 0.787] 0.085 0.020 [2.16 0.508] 0.020 0.0015 [0.508 0.038] rwr82 0.312 0.016 [7.92 0.406] 0.078 + 0.016 - 0.031 [1.98 + 0.406 - 0.787] 0.020 0.0015 [0.508 0.038] rwr80 0.406 0.031 [10.31 0.787] 0.094 0.031 [2.39 0.787] 0.020 0.0015 [0.508 0.038] rwr71 0.812 0.062 [20.62 1.58] 0.187 0.031 [4.75 0.787] 0.032 0.002 [0.813 0.051] rwr89 0.560 0.062 [14.22 1.58] 0.187 0.031 [4.75 0.787] 0.032 0.002 [0.813 0.051] rwr74 0.875 0.062 [22.23 1.58] 0.312 0.031 [7.92 0.787] 0.040 0.002 [1.02 0.051] rwr84 0.875 0.062 [22.23 1.58] 0.312 0.031 [7.92 0.787] 0.040 0.002 [1.02 0.051] rwr78 1.780 0.062 [45.21 1.58] 0.375 0.031 [9.525 0.787] 0.040 0.002 [1.02 0.051] technical specifications parameter unit rwr resistor characteristics dielectric withstanding voltage v ac 500 minimum for 2 w and smaller, 1000 minimum for 3 w and larger short time overload - 5x rated power for 5 s for 3 w size and smaller, 10x rated power for 5 s fo r 5 w size and greater maximum working voltage v ( p x r ) 1/2 insulation resistance . 1000 m ? minimum dry, 100 m ? minimum after moisture test terminal strength lb 5 minimum for 2 w an d smaller, 10 minimum for 3 w and larger solderability - meets requir ements of ansi j-std-002 operating temperature range c -55 to +250 resistance temperature coefficient temperature ? coefficient ? (ppm/c) rwr71 rwr74 rwr78 rwr80 rwr81 rwr82 rwr84 rwr89 resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) resistance range ( ? ) +650 max. 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 0.1 to 0.499 +400 max. 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 0.505 to 1.0 50 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 1.01 to 10 30 10.1 to 73.2 10.1 to 158 10.1 to 453 - - - 10.1 to 158 10.1 to 42.2 20 74.1 and above 160 and above 459 and above 10.1 and above 10.1 and above 10.1 and above 160 and above 42.7 and above b 1.50 [ 3 8.10] (1) min. a c
rwr military www.vishay.com vishay dale revision: 14-jul-16 3 document number: 30203 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 material specifications element: copper-nickel alloy or nickel-chrome alloy, depending on re sistance value core: ceramic, be ryllium oxide (1) , steatite or alumina, depending on power requirement coating: special high te mperature 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, milit ary pin, date/lot code note (1) rwr82s and rwr82n: core co nsists of beryllium oxide ceramic derating note (2) for resistance values above 100 ? , test limit is 1.0 %. ambient temperature in c rated power in % 25 0 20 40 60 80 100 120 - 65 - 50 0 50 150 250 performance test conditions of test test limits thermal shock mil-std-202, method 107 (0.2 % + 0.005 ? ) ? r short time overload 5 x rated power (rwr71, rwr80, rwr81, rwr89, rwr82), ? 10 x rated power (rwr74, rwr78, rwr84) for 5 s (0.2 % + 0.005 ? ) ? r dielectric withstanding voltage 500 v rms (rwr80, rwr81, rwr82), ? 1000 v rms (rwr71, rwr74, rwr78, rwr84, rwr89), 1 min duration (0.1 % + 0.005 ? ) ? r low temperature storage -55 c for 24 h (0.1 % + 0.005 ? ) ? r high temperature exposure 250 c for 2000 h (1.0 % + 0.005 ? ) ? r (2) moisture resistance mil-std-202, method 106 (0.2 % + 0.005 ? ) ? r shock, specified pu lse mil-std-202, method 213, condition i (0.1 % + 0.005 ? ) ? r vibration, high frequency mil-std-202, method 204, condition d (0.1 % + 0.005 ? ) ? r load life 2000 h at rated po wer, +25 c, 1.5 h on, 0.5 h off (0.5 % + 0.005 ? ) ? r extended life 10 000 h at rated power, +25 c, 1.5 h on, 0.5 h off (1.0 % + 0.005 ? ) ? r terminal strength mil-std-202, method 211, condition a and c ? 5 pound (rwr80, rwr81, rwr82), ? 10 pound (rwr71, rwr74, rwr78, rwr84, rwr89) (0.1 % + 0.005 ? ) ? r
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