Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Type RE, Aluminum Housed, Chassis Mount STANDARD ELECTRICAL SPECIFICATIONS MILITARY VISHAY REFERENCE POWER RATING P 25 C W FEATURES Molded construction for total environmental protection Complete welded construction Qualified to MIL-PRF-18546 Available in non-inductive styles (type N) with Ayrton-Perry winding for lowest reactive components Mounts on chassis to utilize heat-sink effect Excellent stability in operation (< 1 % change in resistance) RESISTANCE RANGE TOLERANCE ± % WEIGHT (typical) g G RH5 5.1 to 3.32K 1 3 N NH5 5 1. to 1.65K 1 3.3 G RH1 1.1 to 5.62K 1 6 N NH1 1 1. to 2.8K 1 8.8 G RH25.1 to 12.1K 1 13 N NH25 1. to 6.4K 1 16.5 G RH5 3.1 to 39.2K 1 28 N NH5 3 1. to 19.6K 1 35 G RH 75.5 to 29.4K 1 35 N NH 75 1. to 14.7K 1 385 RE8G RH25 1.1 to 35.7K 1 63 RE8N NH25 1 1. to 17.4K 1 69 TECHNICAL SPECIFICATIONS PARAMETER UNIT RE RESISTOR CHARACTERISTICS Temperature Coefficient ppm/ C ± for 1 and above; ± 5 for 1 to 9.9 ; ± for.1 to.99 Maximum Working Voltage V (P x R) 1/2 Insulation Resistance 1 M minimum dry, M minimum after moisture test Solderability - MIL-PRF-18546 type - meets requirements of ANSI J-STD-2 Operating Temperature Range C -55 to +25 MILITARY PART NUMBER INFORMATION Military Part Numbering example: N132J1 R E 7 7 N 1 3 2 J 1 MIL TYPE CHARACTERISTIC RESISTANCE VALUE PACKAGING CODE RE8 Note Only tolerance available for RE type is ± 1 %. G = Inductive N = Non-inductive 3 digit significant figure, followed by a multiplier 49R9 = 49.9 = 1 = 132 = 13 C2 = Card pack J1 = Skin pack Revision: 23-Jun-16 1 Document Number: 3282 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?9
,, D C A M F E B N J G K L P H MILITARY A B C D E F G H J K L M N P.444 [11.28.562 [14.27.719 [18.26 1.562 [39.67.49 [12.45.625 [15.88.781 [19.84.844 [21.44.6 ±.3 [15.24.75 ±.31 [19.5 1.62 ±.31 [26.97 1.968 ±.31 [49.99 1.125 [28.58 1.375 [34.93 1.938 [49.23 2.781 [7.64.334 [8.48.4 [1.67.55 [13.97.63 [16..646 [16.41.8 [.32 1.8 [27.43 1.14 [28.96.3 [8.13.39 [9.91.546 [13.87.61 [15.49.65 [1.65.75 [1.91.75 [1.91.88 [2.24.133 [3.38.165 [4.19.231 [5.87.26 [6.6.78 [1.98.93 [2.36.172 [4.37.196 [4.98.93 [2.36.94 [2.39.125 [3.18.125 [3.18.78 [1.98.12 [2.59.115 [2.92.17 [2.72.5 [1.27.85.85.85.266 [6.76.312 [7.92.438 [11.13.438 [11.13 Nickel plated brass nut stainless steel stud 3.5 ±.31 [88.9.188 [4.78 Dia. typ. 1.812 ±.31 [46.2 2.812 ±.31 [71.42 1.125 ±.31 [28.58 2.25 [57.15 1.75 ±.31 [44.45 RE8 12-24 UNC-2A Thd. typ. Nickel plated brass nut stainless steel stud.375 ±.31 [9.52 2.75 [69.85 5.478 ±.93 [139.14 ± 2.36].188 [4.78 Dia. typ. 4.5 ±.31 [114.3.989 ±.31 [25.12 1/4 - UNC-2A thd. typ. 2.125 ±.31 [53.98.188 ±.31 [4.78 typ..77 [19.56 3. ±.31 [76. 1.25 [31.75 ± 1.575] 2.5 [63.5 2.188 ±.31 [55.58.312 ±.31 [7.92.875 [22.23 3. [76. 3.875 [98.42 7. ±.93 [177.8 ± 2.36] 1.25 [31.75 ± 1.575].25 ±.31 [6.35 typ..955 [24.26 Revision: 23-Jun-16 2 Document Number: 3282 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?9
POWER RATING Vishay RE resistor wattage ratings are based on mounting to the following heat sink: and : 4" x 6" x 2" x.4" thick aluminum chassis and : 5" x 7" x 2" x.4" thick aluminum chassis and RE8: 7" x 9" x 2" x.6" thick aluminum chassis FREE AIR POWER RATING MILITARY RE8 W at 25 C 3 6 8 1 3 75 AMBIENT TEMPERATURE DERATING Derating is required for ambient temperatures above 25 C when mounted to specified heat sink, see the following graph. RATED POWER IN % 1 8 6 4-55 - 5 5 15 25 25 AMBIENT TEMPERATURE IN C REDUCED HEAT SINK DERATING Derating is also required when recommended heat sink area is reduced. POWER IN W 35 3 25 POWER IN W 14 1 8 RE8 15 1 5 6 4 1 1 CHASSIS AREA IN SQUARE INCHES 1 1 CHASSIS AREA IN SQUARE INCHES Revision: 23-Jun-16 3 Document Number: 3282 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?9
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: For and RE8 terminals are threaded stainless steel. All others are 6/4 tin/lead (Sn/Pb) w/nickel underplate on copper clad steel core terminal. Part Marking: Dale, model, wattage, value, tolerance, date code NON-INDUCTIVE (TYPE N) Models of equivalent physical and electrical specifications are available with non-inductive (Ayrton-Perry) winding. They are identified by substituting the letter N for G in the model number (N, for example). PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal Shock Rated power applied until thermally stable, then a minimum of 15 min at -55 C ± (.5 % +.5 ) R Short Time Overload 5x rated power for 5 s ± (.5 % +.5 ) R Dielectric Withstanding Voltage V RMS for, and ; V RMS for ; 45 V RMS for and RE8; duration 1 min ± (.2 % +.5 ) R Temperature 25 C for 2 h ± (.5 % +.5 ) R Moisture Resistance MIL-STD-2 Method 16, 7b not applicable ± (1. % +.5 ) R Shock, Specified Pulse MIL-STD-2 Method 213, g s for 6 ms, 1 shocks ± (.2 % +.5 ) R Vibration, High Frequency Frequency varied 1 Hz to Hz, g peak, 2 directions 6 h each ± (.2 % +.5 ) R Load Life h at rated power, +25 C, 1.5 h ON,.5 h OFF ± (1. % +.5 ) R Terminal Strength 3 s, 5 pound pull test for and, 1 pound pull test for other sizes; torque test - 24 pound inch for and 32 pound inch for RE8 ± (.2 % +.5 ) R Revision: 23-Jun-16 4 Document Number: 3282 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?9
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