www.vishay.com for technical questions , contact: ww2bresis tors@vishay.com document number: 30200 160 revision: 29-may-08 erh, enh vishay dale wirewound resistors, military/established reliability mil-prf-39009 qualified, type rer, r level features ? aluminum heat sink housing ? molded construction for total environmental protection ? qualified to mil-prf-39009 ? complete welded construction ? available in non-inductive styles (type enh) with aryton- perry winding for lowest reactive components ? mounts on chassis to utilize heat-sink effect standard electrical specifications model mil-prf-39009 type power rating p 25 c w military resistance range 1 % weight (typical) g mounted free air enh-5 rer40 5 3 1 - 1.65k 3.3 enh-10 rer45 10 6 1 - 2.8k 8.8 enh-25 rer50 20 8 1 - 6.04k 16.5 enh-50 rer55 30 10 1 - 4.99k 35 erh-5 rer60 5 3 0.10 - 3.32k 3 erh-10 rer65 10 6 0.10 - 5.62k 6 erh-25 rer70 20 8 0.10 - 12.1k 13 erh-50 rer75 30 10 0.10 - 39.2k 28 technical specifications parameter unit erh, enh resistor characteristics temperature coefficient ppm/c 100 for 0.1 to 0.99 , 50 for 1 to 19.9 , 20 for 20 and above dielectric withstanding voltage v ac 1000 for erh-5, erh-10 and erh-25, 2000 for erh-50 short time overload - 5 x rated power for 5 s maximum working voltage v ( p x r ) 1/2 insulation resistance 10 000 m minimum dry, 1000 m minimum after moisture test terminal strength lb 5 pull for erh-5 and erh-10, 10 pull for erh-25 and erh-50 solderability - meets requirements of ansi j-std-002 operating temperature range c - 55 to + 250 global part number information global/military part numbering: rer65f1001rc02 mil type tolerance code resistance value failure rate packaging code rer40 rer45 rer50 rer55 rer60 rer65 rer70 rer75 f = 1.0 % 3 digit significant figure, followed by a multiplier 49r9 = 49.9 1000 = 100 1001 = 1000 m = 1.0 %/1000 h p = 0.1 %/1000 h r = 0.01 %/1000 h c02 = tin/lead, card pack csl = tin/lead, card pack, single lot date code 65f1 01r 0 er c02 r
document number: 30200 for technical ques tions, contact: ww2bres istors@vishay.com www.vishay.com revision: 29-may-08 161 erh, enh wirewound resistors, milit ary/established reliability mil-prf-39009 qualifi ed, type rer, r level vishay dale dimensions material specifications element: copper-nickel alloy or nickel-chrome alloy, depending on resistance value core: ceramic, steatite or alumina, depending on physical size encapsulant: silicone molded construction housing: aluminum with hard anodic coating end caps: stainless steel standard terminals: tinned copperweld ? part marking: source code, jan, military pin, date/lot code power rating vishay erh and enh resistor wattage ratings are based on mounting to the proper heat sink. erh-5 and erh-10: 4" x 6" x 2" x 0.040" thick aluminum chassis erh-25 and erh-50: 5" x 7" x 2" x 0.040" thick aluminum chassis applicable mil specification mil-prf-39009: this is the military specification covering housed chassis mount established reliability power wirewound resistors. vishay erh and enh resistors are listed as qualified on the mil-prf-39009 qpl. model dimensions in inches [millimeters] abcd e f gh j k lmn p erh-5 enh-5 0.444 0.005 [11.280 0.127] 0.490 0.005 [12.450 0.127] 0.600 0.031 [15.240 0.787] 1.125 0.062 [28.580 1.570] 0.334 0.015 [8.480 0.381] 0.646 0.015 [16.410 0.381] 0.320 0.015 [8.130 0.381] 0.065 0.010 [1.650 0.254] 0.133 0.010 [3.380 0.254] 0.078 0.010 [1.980 0.254] 0.093 0.005 [2.360 0.127] 0.078 0.015 [1.980 0.381] 0.050 0.005 [1.270 0.127] 0.266 0.062 [6.760 1.570] erh-10 enh-10 0.562 0.005 [14.270 0.127] 0.625 0.005 [15.880 0.127] 0.750 0.031 [19.050 0.787] 1.375 0.062 [34.930 1.570] 0.420 0.015 [10.670 0.381] 0.800 0.015 [20.320 0.381] 0.390 0.015 [9.910 0.381] 0.075 0.010 [1.900 0.254] 0.165 0.010 [4.190 0.254] 0.093 0.010 [2.360 0.254] 0.094 0.005 [2.390 0.127] 0.102 0.015 [2.590 0.381] 0.085 0.005 [2.160 0.127] 0.312 0.062 [7.920 1.570] erh-25 enh-25 0.719 0.005 [18.260 0.127] 0.781 0.005 [19.840 0.127] 1.062 0.031 [26.970 0.787] 1.938 0.062 [49.230 1.570] 0.550 0.015 [13.970 0.381] 1.080 0.015 [27.430 0.381] 0.546 0.015 [13.870 0.381] 0.075 0.010 [1.900 0.254] 0.231 0.010 [5.870 0.254] 0.172 0.010 [4.370 0.254] 0.125 0.005 [3.180 0.127] 0.115 0.015 [2.920 0.381] 0.085 0.005 [2.160 0.127] 0.438 0.062 [11.130 1.570] erh-50 enh-50 1.562 0.005 [39.670 0.127] 0.844 0.005 [21.440 0.127] 1.968 0.031 [49.990 0.787] 2.781 0.062 [70.640 1.570] 0.630 0.015 [16.000 0.381] 1.140 0.015 [28.960 0.381] 0.610 0.015 [15.490 0.381] 0.088 0.010 [2.240 0.254] 0.260 0.010 [6.600 0.254] 0.196 0.010 [4.980 0.254] 0.125 0.005 [3.180 0.127] 0.107 0.015 [2.720 0.381] 0.085 0.005 [2.160 0.127] 0.438 0.062 [11.130 1.570] l k p m d c a b n j e f h g - 55 0 50 100 150 200 250 ambient temperature in c 120 100 8 0 60 40 20 0 25 derating rated power in % - 50 performance test conditions of test test limits low temperature operation apply rated power until thermal stability, remove power subject to air temperature of - 55 c for 15 to 30 min (0.5 % + 0.01 ) r short time overload 5 x rated power for 5 s (0.3 % + 0.01 ) r dielectric withstanding voltage 1000 v rms (rer 40, 45, 50, 60, 65, 70), 2000 v rms (rer55 and 75), 1 min duration (0.2 % + 0.01 ) r low temperature storage - 55 c for 24 h (0.3 % + 0.01 ) r high temperature exposure 250 c for 2000 h (1.0 % + 0.01 ) r moisture resistance mil-std-202, method 106 (0.5 % + 0.01 ) r shock, specified pulse mil-std-202, method 213, condition 1 (0.2 % + 0.01 ) r vibration, high frequency mil-std-202, method 204, condition d (0.2 % + 0.01 ) r load life 2000 h at rated power, + 25 c, 1.5 h ?on?, 0.5 h ?off? (1.0 % + 0.01 ) r extended life 10 000 h at rated power, + 25 c, 1.5 h ?on?, 0.5 h ?off? (2.0 % + 0.01 ) r terminal strength mil-std-202, method 211, condition a 5 pound (rer40, 45, 60, 65), 10 pound (rer50, 55, 70, 75) (0.2 % + 0.01 ) r
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