rwr military www.vishay.com vishay dale revision: 12-sep-11 1 document number: 30203 for technical questions, contact: ww2bresistors@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 rwr, r level, axial lead features ? high temperature silicone coated ? complete welded construction ? qualified to mil-prf-39007 ? available in non-inductive styles (type n) with aryton-perry winding for lowest 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 (1) note that w and z are not listed above but are available, s ee mil-prf-39007 qpl for avai lable resistance values. 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 2 0.499 to 1.3k 0.1 to 1.3k 0.23 rwr82n egn-2 2 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 technical specifications parameter unit rwr resistor characteristics temperature coeffici ent ppm/c 20 for 10 ? and above; 50 for 1.1 ? to 10 ? ; 400 for 0.505 ? to 1 ? ; 650 for 0.1 ? to 0.499 ? dielectric withstanding voltage v ac 500 minimum for 2 w and smaller, 1000 minimum for 3 w and larger short time overload - 5 x rated power for 5 s for 3 w size and smaller, 10 x 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 mini mum for 2 w and smaller, 10 minimum for 3 w and larger solderability - meets requir ements of ansi j-std-002 operating temperature range c - 65 to + 250 global part number information global part numbering example: rwr74s49r9fsb12 mil type terminal wire and winding resistance value tolerance code failure rate packaging code 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 (5 w and higher) bsl = bulk pack, single lot date code rsl = tape/reel, single lot date code 74s4 r9f 9 wr sb1 r 2
rwr military www.vishay.com vishay dale revision: 12-sep-11 2 document number: 30203 for technical questions, contact: ww2bresistors@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. 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 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, military pin, date/lot code derating note (2) for resistance values above 100 ? , test limit is 1.0 %. 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] 0.312 0.031 [7.92 0.787] 0.040 0.002 [1.02 0.051] b 1.50 [ 3 8.10] (1) min. a c 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-2.2, method 303 (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 - 65 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 pulse mi l-std-202, method 213, condition 1 (0.1 % + 0.005 ? ) ? r vibration, high frequency mil-std-202, me thod 204, condition d (0.1 % + 0.005 ? ) ? r load life 2000 h at rated power, + 25 c, 1.5 h on, 0.5 h off (0.5 % + 0.005 ? ) ? r extended life 10 000 h at rate d 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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