RH, NH Vishay Dale Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Type RE, Aluminum Housed, Chassis Mount FEATURES • Molded construction for total environmental protection • Complete welded construction • Meets applicable requirements of MIL-PRF-18546 • Available in non-inductive styles (type NH) with Aryton- Perry winding for lowest reactive components • Mounts on chassis to utilize heat-sink effect • Excellent stability in operation STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE RANGE GLOBAL HISTORICAL MIL-PRF- WEIGHT P MIL. RANGE SHOWN IN BOLD FACE 25°C 18546 (Typical) W Ω MODEL MODEL TYPE DALE MILITARY ± 0.05%, ± 0.1% ± 0.25% ± 0.5% ± 1%, ± 3%, ± 5% g 7.5 (5) 0.5 - 6.75k 0.1 - 8.6k 0.05 - 8.6k 0.02 - 24.5k RH005 — 3 RH-5 5 — — — 0.10 - 3.32k RE60G 7.5 (5) 0.5 - 2.32k 0.1 - 3.27k 0.05 - 3.27k 0.05 - 12.75k NH-5 — 3.3 NH005 5 — — — 1.0 - 1.65k RE60N 12.5 (10) 0.5 - 12.7k 0.1 - 16.69k 0.05 - 16.69k 0.01 - 47.1k RH-10 — 6 RH010 10 — — — 0.10 - 5.62k RE65G 12.5 (10) 0.5 - 4.45k 0.1 - 5.54k 0.05 - 5.54k 0.05 - 23.5k 8.8 NH-10 — NH010 10 — — — 1.0 - 2.8k RE65N 25 0.5 - 25.7k 0.1 - 32.99k 0.05 - 32.99k 0.01 - 95.2k RH-25 — 13 RH025 20 — — — 0.10 - 12.1k RE70G 25 0.5 - 9.09k 0.1 - 12.8k 0.05 - 12.8k 0.05 - 47.6k — 16.5 NH025 NH-25 20 — — — 1.0 - 6.04k RE70N 50 0.5 - 73.4k 0.1 - 96k 0.05 - 96k 0.01 - 273k 28 RH-50 — RH050 30 — — — 0 .10 - 39.2k RE75G 50 0.5 - 26k 0.1 - 36.7k 0.05 - 36.7k 0.05 - 136k NH-50 — 35 NH050 30 — — — 1.0 - 19.6k RE75N 100 0.5 - 90k 0.1 - 90k 0.05 - 90k 0.05 - 90k — 350 RH100 RH-100 75 — — — 0.05 - 29.4k RE77G 100 0.5 - 37.5k 0.1 - 37.5k 0.05 - 37.5k 0.05 - 37.5k 385 NH-100 — NH100 75 — — — 1.0 - 14.7k RE77N 0.1 - 116k 0.05 - 116k 0.05 - 116k 250 0.5 - 116k RH-250 — 630 RH250 120 — — — 0.10 - 35.7k RE80G 250 0.5 - 48.5k 0.1 - 48.5k 0.05 - 48.5k 0.05 - 48.5k — 690 NH250 NH-250 120 — — — 1.0 - 17.4k RE80N NOTE: Figures in parentheses on RH-5 and RH-10 indicate wattage printed on parts, new construction allows these resistors to be rated at higher wattage but will only be printed with the higher wattage on customer request. GLOBAL PART NUMBER INFORMATION New Global Part Numbering: RH0054R125FC02 (preferred part numbering format) R H 0 0 54 R 1 2 5 F C 02 GLOBAL MODEL RESISTANCE TOLERANCE CODE PACKAGING SPECIAL VALUE RH005 L = Milliohm A = ± 0.05% B = ± 0.1% *E02 = Lead Free, Card Pack (RH005 – RH050) (Dash Number) R = Decimal C = ± 0.25% D = ± 0.5% *E01 = Lead Free, Skin Pack (RH100 & RH250) (up to 3 digits) K = Thousand F = ± 1.0% J = ± 5.0% Lead Free is not available on RE military type From 1-999 8L000 = 0.008Ω *(Lead Free parts to be released Q1 2005) as applicable 15R00 = 15Ω 10K00 = 10KΩ C02 = Tin/Lead, Card Pack (RH005 – RH050) J01 = Tin/Lead, Skin Pack (RH100 & RH250) Historical Part Number example: RH-5 4.125Ω 1% C02 (will continue to be accepted) RH-5 4.125Ω 1% C02 HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING www.vishay.com For technical questions, contact ww2bresistors@vishay.com Document Number 30201 122 Revision 09-Sep-04 RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Vishay Dale Type RE, Aluminum Housed, Chassis Mount DIMENSIONS D RH-5, -10, -25, -50 C F M NH-5, -10, -25, -50 A E N G J B P H L K MODEL DIMENSIONS in inches [millimeters] AB C D E F G H J K LM N P RH-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 NH-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 [11.28 [12.45 [15.24 [28.58 [8.48 [16.41 [8.13 [1.65 [3.38 [1.98 [2.36 [1.98 [1.27 [6.76 ± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± .381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± .381] ± 0.127] ± 1.57] RH-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 NH-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 [14.27 [15.88 [19.05 [34.93 [10.67 [20.32 [9.91 [1.91 [4.19 [2.36 [2.39 [2.59 [2.16 [7.92 ± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57] RH-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 NH-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 [18.26 [19.84 [26.97 [49.23 [13.97 [27.43 [13.87 [1.91 [5.87 [4.37 [3.18 [2.92 [2.16 [11.13 ± 0.127] ± 0.127] ± 0.787] ± 1.57] ± .381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57] RH-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 NH-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 [39.67 [21.44 [49.99 [70.64 [16.00 [28.96 [15.49 [2.24 [6.60 [4.98 [3.18 [2.72 [2.16 [11.13 ± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57] RH-100, NH-100 0.188 ± 0.010 Nickel Plated [4.78 ± 0.254] Brass Nut 3.50± 0.031 1.812± 0.031 Dia. Typ. Stainless Steel Stud [88.90± 0 .787] [46.02±0.787] 1.125 ± 0.031 [28.58 ± 0.787] 2.812 ± 0.031 1.75± 0.031 [71.42 ± 0.787] 2.25 ± 0.010 [44.45±0.787] [57.15 ± 0.254] .375 ± 0.031 [9.52 ± 0.787] 12 - 24 0.989 ± 0.031 0.188± 0.031 0.770± 0.015 UNC-2A 2.75 ± 0.010 [25.12 ± 0.787] [19.56± 0.381] [4.78± 0.787] Thd. Typ. [69.85 ± 0.254] Typ. 5.478 ± 0.093 [139.14 ± 2.36] RH-250, NH-250 0.188 ± 0.010 [4.78 ± 0.254] Nickel Plated Dia. Typ. 1/4 - 20 2.125± 0.031 Brass Nut UNC-2A Thd.Typ. [53.98± 0.787] 4.50± 0.031 Stainless Steel Stud [114.30±0.787] 1.25± 0.062 [31.75± 1.575] 2.188± 0.031 3.0 ± .031 [76.20 ± 0.787] [55.58± 0.787] 2.50± 0.010 [63.50± 0.254] 0.875± 0.010 0.955± 0.015 [22.23± .254] 0.250± 0.031 1.25± 0.062 [24.26± .381] .312 ± 0.031 [6.35± 0.787] 3.0 ± 0.010 [31.75± 1.575] [7.92 ± 0.787] [76.20± .254] Typ. 3.875± 0.010 [98.42± 0.254] 7.0± .093 [177.80± 2.36] Document Number 30201 For technical questions, contact ww2bresistors@vishay.com www.vishay.com Revision 09-Sep-04 123 RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Vishay Dale Type RE, Aluminum Housed, Chassis Mount TECHNICAL SPECIFICATIONS PARAMETER UNIT RH RESISTOR CHARACTERISTICS Temperature Coefficient ppm/°C ± 100 for 0.1Ω to 0.99Ω, ± 50 for 1Ω to 9.9Ω, ± 20 for 10Ω and above Dielectric Withstanding Voltage V 1000 for RH-5, RH-10 and RH-25, 2000 for RH-50, 4500 for RH-100 and RH-250 AC Short Time Overload - 5 x rated power for 5 seconds 1/2 Maximum Working Voltage V (P X R) Insulation Resistance Ω 10,000 Megohm minimum dry, 1000 Megohm minimum after moisture test Terminal Strength lb 5 minimum for RH-5 and RH-10, 10 minimum for all others Solderability - MIL-PRF-18546 Type - Meets requirements of ANSI J-STD-002 OperatingTemperature Range °C - 55/+ 250 POWER RATING Vishay RH resistor wattage ratings are based on mounting to the following heat sink: RH-5 and RH-10: 4" x 6" x 2" x 0.040" thick aluminum chassis (129 sq. in. surface area) RH-25: 5" x 7" x 2" x 0.040" thick aluminum chassis (167 sq. in. surface area) RH-50: 12" x 12" x 0.059" thick aluminum panel (291 sq. in. surface area) RH-100 and RH-250: 12" x 12" x 0.125" thick aluminum panel (294 sq. in. surface area) AMBIENT TEMPERATURE DERATING Derating is required for ambient temperatures above 25°C, see the following graph. Curves A, B, C apply to operation of unmounted resistors. Curve D applies to all types when mounted to specified heat sink. A = RH-5 and RH-10 size resistor, unmounted B = RH-25 size resistor, unmounted C = RH-50, RH-100 and RH-250 size resistor, unmounted D = All types mounted to recommended aluminum heat sink 120 100 80 D A 60 B C 40 20 0 -55 -50 0 50 150 250 25 AMBIENT TEMPERATURE IN °C Derating 100 REDUCED HEAT SINK DERATING: 90 Derating is also required when recommended heat 80 sink area is reduced. A A = RH-5 and RH-10 size resistor 70 B B = RH-25 size resistor 60 C = RH-50, RH-100 and RH-250 size resistor 50 C 40 30 20 10 0 0 20 40 60 80 100 % OF RECOMMENDED HEAT SINK AREA Heat Sink Derating www.vishay.com For technical questions, contact ww2bresistors@vishay.com Document Number 30201 124 Revision 09-Sep-04 RATED POWER IN % RATED POWER IN % RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Vishay Dale Type RE, Aluminum Housed, Chassis Mount MATERIAL SPECIFICATIONS SPECIAL MODIFICATIONS Element: Copper-nickel alloy or nickel-chrome alloy, A number of special modifications to the aluminum housed depending on resistance value resistor style are available upon request. Special Core: Ceramic, steatite or alumina, depending on physical modifications include: size • Terminal configurations and materials Encapsulant: Silicone molded construction • Resistance values and tolerances Housing: Aluminum with hard anodic coating • Low resistance temperature coefficient (RTC) End Caps: Stainless steel Standard Terminals: 100% Sn, w/Nickel underplate, or 60/ • Housing configuration ® 40 Sn/Pb, w/Nickel underplate, coated Copperweld on RH-5 • Threaded mounting holes through RH-50 size. Threaded stainless steel terminals on RH-100 and RH-250. • Preconditioning and other additional testing NOTE: Military (RE) parts are only available with 60/40 Sn/Pb APPLICABLE MIL SPECIFICATIONS finish. Part Marking: DALE, Model, Wattage, Value, Tolerance, MIL-PRF-18546 is the military specification covering Date Code aluminum housed, chassis mount, power resistors. VISHAY RH and NH resistors are listed as qualified on the NH NON-INDUCTIVE MIL-PRF-18546 QPL. Models of equivalent physical and electrical specifications are available with non-inductive (Aryton-Perry) winding. They are identified by substituting the letter N for R in the model number (NH-5, for example). PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal Shock Rated power applied until thermally stable, then a minimum of 15 minutes at - 55°C ± (0.5% + 0.05Ω) ∆R Short Time Overload 5 x rated power for 5 seconds ± (0.5% + 0.05Ω) ∆R 1000Vrms for RH-5, RH-10 and RH-25; 2000Vrms for RH-50 Dielectric Withstanding Voltage ± (0.2% + 0.05Ω) ∆R 4500Vrms for RH-100 and RH-250; duration one minute Temperature 250°C for 2 hours ± (0.5% + 0.05Ω) ∆R Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (1.0% + 0.05Ω) ∆R Shock, Specified Pulse MIL-STD-202 Method 213, 100g's for 6 miliseconds, 10 shocks ± (0.2% + 0.05Ω) ∆R Vibration, High Frequency Frequency varied 10 to 2000Hz, 20g peak, 2 directions 6 hours each ± (0.2% + 0.05Ω) ∆R Load Life 1000 hours at rated power, + 25°C, 1.5 hours “ON”, 0.5 hours “OFF” ± (1.0% + 0.05Ω) ∆R 30 second, 5 pound pull test for RH-5 and RH-10, 10 pound pull test for other Terminal Strength ± (0.2% + 0.05Ω) ∆R sizes, torque test - 24 pound inch for RH-100 and 32 pound inch for RH-250 Document Number 30201 For technical questions, contact ww2bresistors@vishay.com www.vishay.com Revision 09-Sep-04 125