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 POWER RATING MODEL MIL-PRF-39009 MILITARY WEIGHT P 25C RESISTANCE RANGE (Typical) W TYPE 1% MOUNTED FREE AIR g 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 1000 for ERH-5 ERH-10 and ERH-25, 2000 for ERH-50 AC Short Time Overload - 5 x rated power for 5 seconds 1/2 Maximum Working Voltage V (P x R) Insulation Resistance 10,000 Megohm minimum dry, 1000 Megohm 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/+ 250 ORDERING INFORMATION RER50 F 49R9 R MILITARY TOLERANCE RESISTANCE FAILURE TYPE RATE www.vishay.com For technical questions, contact ww2bresistors vishay.com Document Number 30200 138 Revision 18-Oct-00ERH, ENH Wirewound Resistors, Military/Established, Reliability Vishay Dale D DIMENSIONS C A F M E N H G B J P K L MODEL DIMENSIONS in inches millimeters ABC D E F G H J K L M N P ERH-5 0.444 0.490 0.600 1.125 0.334 0.646 0.320 0.065 0.133 0.078 0.093 0.078 0.050 0.266 ENH-5 0.005 0.005 0.031 0.062 0.015 0.015 0.015 0.010 0.010 0.010 0.005 0.015 0.005 0.062 11.280 12.450 15.240 28.580 8.480 16.410 8.130 1.650 3.380 1.980 2.360 1.980 1.270 6.760 0.127 0.127 0.787 1.570 0.381 0.381 0.381 0.254 0.254 0.254 0.127 0.381 0.127 1.570 ERH-10 0.562 0.625 0.750 1.375 0.420 0.800 0.390 0.075 0.165 0.093 0.094 0.102 0.085 0.312 ENH-10 0.005 0.005 0.031 0.062 0.015 0.015 0.015 0.010 0.010 0.010 0.005 0.015 0.005 0.062 14.270 15.880 19.050 34.930 10.670 20.320 9.910 1.900 4.190 2.360 2.390 2.590 2.160 7.920 0.127 0.127 0.787 1.570 0.381 0.381 0.381 0.254 0.254 0.254 0.127 0.381 0.127 1.570 ERH-25 0.719 0.781 1.062 1.938 0.550 1.080 0.546 0.075 0.231 0.172 0.125 0.115 0.085 0.438 ENH-25 0.005 0.005 0.031 0.062 0.015 0.015 0.015 0.010 0.010 0.010 0.005 0.015 0.005 0.062 18.260 19.840 26.970 49.230 13.970 27.430 13.870 1.900 5.870 4.370 3.180 2.920 2.160 11.130 0.127 0.127 0.787 1.570 0.381 0.381 0.381 0.254 0.254 0.254 0.127 0.381 0.127 1.570 ERH-50 1.562 0.844 1.968 2.781 0.630 1.140 0.610 0.088 0.260 0.196 0.125 0.107 0.085 0.438 ENH-50 0.005 0.005 0.031 0.062 0.015 0.015 0.015 0.010 0.010 0.010 0.005 0.015 0.005 0.062 39.670 21.440 49.990 70.640 16.000 28.960 15.490 2.240 6.600 4.980 3.180 2.720 2.160 11.130 0.127 0.127 0.787 1.570 0.381 0.381 0.381 0.254 0.254 0.254 0.127 0.381 0.127 1.570 MATERIAL SPECIFICATIONS 120 Element: Copper-nickel alloy or nickel-chrome alloy, 100 depending on resistance value 80 Core: Ceramic, steatite or alumina, depending on physical size 60 Encapsulant: Silicone molded construction 40 Housing: Aluminum with hard anodic coating 20 End Caps: Stainless steel 0 Standard Terminals: Tinned Copperweld -55 -50 0 50 150 250 25 Part Marking: Source Code, JAN, Military PIN, AMBIENT TEMPERATURE IN C Date/Lot Code Derating APPLICABLE MIL SPECIFICATION POWER RATING Vishay ERH and ENH resistor wattage ratings are based on MIL-PRF-39009: This is the military specification covering mounting to the proper heat sink. housed chassis mount established reliability power ERH-5 and ERH-10: 4 x 6 x 2 x 0.040 thick aluminum chassis wirewound resistors. Vishay ERH and ENH resistors are ERH-25 and ERH-50: 5 x7 x 2 x 0.040 thick aluminum chassis listed as qualified on the MIL-PRF-39009 QPL. PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Low Temperature Operation Apply rated power until thermal stability, remove power subject to air (0.5% + 0.01 ) R temperature of - 55C for 15 to 30 minutes Short Time Overload 5 x rated power for 5 seconds (0.3% + 0.01 ) R Dielectric Withstanding Voltage 1000Vrms (RER 40, 45, 50, 60, 65, 70), 2000Vrms (RER55 and 75), (0.2% + 0.01 ) R one minute duration Low Temperature Storage - 55C for 24 hours (0.3% + 0.01 ) R High Temperature Exposure 250C for 2000 hours (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 hours at rated power, + 25C, 1.5 hours ON, 0.5 hours OFF (1.0% + 0.01 ) R Extended Life 10,000 hours at rated power, + 25C, 1.5 hours ON, 0.5 hours OFF (2.0% + 0.01 ) R Terminal Strength MIL-STD-202, Method 211, Condition A (0.2% + 0.01 ) R 5 pound (RER40, 45, 60, 65), 10 pound (RER50, 55, 70, 75) Document Number 30200 For technical questions, contact ww2bresistors vishay.com www.vishay.com Revision 18-Oct-00 139