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 (< 1 % change in resistance) Pb-free Available e4 RoHS* COMPLIANT STANDARD ELECTRICAL SPECIFICATIONS POWER RATING P25 °C W GLOBAL HISTORICAL MIL-PRF18546 MODEL MODEL TYPE RESISTANCE RANGE MIL. RANGE SHOWN IN BOLD FACE Ω DALE RH005 RH-5 NH005 NH-5 RH010 RH-10 NH010 NH-10 RH025 RH-25 NH025 NH-25 RH050 RH-50 NH050 NH-50 RH100 RH-100 NH100 NH-100 RH250 RH-250 NH250 NH-250 MILITARY ± 0.05 %, ± 0.1 % 0.5 - 6.75K 7.5 (5) 5 0.5 - 2.32K 7.5 (5) 5 0.5 12.7K 12.5 (10) 10 0.5 - 4.45K 12.5 (10) 10 0.5 25.7K 25 20 0.5 - 9.09K 25 20 0.5 - 73.4K 50 30 0.5 - 26K 50 30 0.5 - 90K 100 75 0.5 - 37.5K 100 75 0.5 - 116K 250 120 0.5 48.5K 250 120 - RE60G RE60N RE65G RE65N RE70G RE70N RE75G RE75N RE77G RE77N RE80G RE80N WEIGHT (typical) g ± 0.25 % ± 0.5 % ± 1 %, ± 2 %, ± 5 % 0.1 - 8.6K 0.05 - 8.6K 0.02 - 24.5K 0.10 - 3.32K 0.1 - 3.27K 0.05 - 3.27K 0.05 - 12.75K 1.0 - 1.65K 0.1 - 16.69K 0.05 - 16.69K 0.01 - 47.1K 0.10 - 5.62K 0.1 - 5.54K 0.05 - 5.54K 0.05 - 23.5K 1.0 - 2.8K 0.1 - 32.99K 0.05 - 32.99K 0.01 - 95.2K 0.10 - 12.1K 0.1 - 12.8K 0.05 - 12.8K 0.05 - 47.6K 1.0 - 6.04K 0.1 - 96K 0.05 - 96K 0.01 - 273K 0 .10 - 39.2K 0.1 - 36.7K 0.05 - 36.7K 0.05 - 136K 1.0 - 19.6K 0.1 - 90K 0.05 - 90K 0.05 - 90K 0.05 - 29.4K 0.1 - 37.5K 0.05 - 37.5K 0.05 - 37.5K 1.0 - 14.7K 0.1 - 116K 0.05 - 116K 0.05 - 116K 0.10 - 35.7K 0.1 - 48.5K 0.05 - 48.5K 0.05 - 48.5K 1.0 - 17.4K 3 3.3 6 8.8 13 16.5 28 35 350 385 630 690 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 number format) R H 0 0 5 4 R GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE RH005 (See “Standard Electrical Specifications” table above for additional P/N’s) L = Milliohm R = Decimal K = Thousand 8L000 = 0.008 Ω 15R00 = 15 Ω A = 0.05 % B = 0.1 % C = 0.25 % D = 0.5 % F = 1.0 % 1 2 5 F C 0 2 PACKAGING SPECIAL E02 = Lead (Pb)-free, card pack (RH005 - RH050) E01 = Lead (Pb)-free, skin pack (RH100 and RH250) Lead (Pb)-free is not available on RE military type (Dash Number) (up to 3 digits) From 1 - 999 as applicable C02 = Tin/lead, card pack (RH005 - RH050) J01 = Tin/lead, skin pack (RH100 and RH250) Historical Part Number Example: RH-5 4.125 Ω 1 % C02 (will continue to be accepted) RH-5 4.125 Ω 1% C02 HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING * Pb containing terminations are not RoHS compliant, exemptions may apply www.vishay.com 154 For technical questions, contact: [email protected] Document Number: 30201 Revision: 11-Jul-07 RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Type RE, Aluminum Housed, Chassis Mount Vishay Dale DIMENSIONS in inches [millimeters] D C A RH-5, -10, -25, -50 NH-5, -10, -25, -50 F E M N G J B P K MODEL H L DIMENSIONS in inches [millimeters] A B C D E F G H J K L M N P RH-5 NH-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 ± 0.005 ± 0.005 ± 0.030 ± 0.062 ± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062 [2.36 [1.98 [1.27 [6.76 [11.28 [12.45 [15.24 [28.58 [8.48 [16.41 [8.13 [1.65 [3.38 [1.98 ± 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-10 NH-10 0.093 0.094 0.102 0.085 0.312 0.562 0.625 0.750 1.375 0.420 0.800 0.390 0.075 0.165 ± 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 [9.91 [1.91 [4.19 [2.36 [2.39 [2.59 [2.16 [7.92 [14.27 [15.88 [19.05 [34.93 [10.67 [20.32 ± 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 NH-25 0.172 0.125 0.115 0.085 0.438 0.719 0.781 1.062 1.938 0.550 1.080 0.546 0.075 0.231 ± 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] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57] RH-50 NH-50 0.196 0.125 0.107 0.085 0.438 1.562 0.844 1.968 2.781 0.630 1.140 0.610 0.088 0.260 ± 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 [2.24 [6.60 [4.98 [3.18 [2.72 [2.16 [11.13 [39.67 [21.44 [49.99 [70.64 [16.00 [28.96 [15.49 ± 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] DIMENSIONS in inches [millimeters] RH-100, NH-100 Nickel plated brass nut stainless steel stud 3.50 ± 0.031 [88.90 ± 0.787] 0.188 ± 0.010 [4.78 ± 0.254] Dia. typ. 1.812 ± 0.031 [46.02 ± 0.787] 1.125 ± 0.031 [28.58 ± 0.787] 2.812 ± 0.031 [71.42 ± 0.787] 1.75 ± 0.031 [44.45 ± 0.787] 2.25 ± 0.010 [57.15 ± 0.254] 0.375 ± 0.031 [9.52 ± 0.787] 12 - 24 UNC-2A Thd. typ. 2.75 ± 0.010 [69.85 ± 0.254] 5.478 ± 0.093 [139.14 ± 2.36] RH-250, NH-250 0.188 ± 0.010 [4.78 ± 0.254] Dia. typ. 4.50 ± 0.031 [114.30 ± 0.787] Nickel plated brass nut stainless steel stud 1/4 - 20 UNC-2A thd. typ. 2.125 ± 0.031 [53.98 ± 0.787] 1.25 ± 0.062 [31.75 ± 1.575] 3.0 ± 0.031 [76.20 ± 0.787] 0.312 ± 0.031 [7.92 ± 0.787] 0.188 ± 0.031 0.770 ± 0.015 [4.78 ± 0.787] [19.56 ± 0.381] typ. 0.989 ± 0.031 [25.12 ± 0.787] 55.58 ± 0.787 [2.188 ± 0.031] 2.50 ± 0.010 [63.50 ± 0.254] 0.875 ± 0.010 [22.23 ± 0.254] 3.0 ± 0.010 [76.20 ± 0.254] 3.875 ± 0.010 [98.42 ± 0.254] 7.0 ± 0.093 [177.80 ± 2.36] Document Number: 30201 Revision: 11-Jul-07 1.25 ± 0.062 [31.75 ± 1.575] For technical questions, contact: [email protected] 0.250 ± 0.031 [6.35 ± 0.787] typ. 0.955 ± 0.015 [24.26 ± 0.381] www.vishay.com 155 RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Type RE, Aluminum Housed, Chassis Mount Vishay Dale TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient UNIT RH RESISTOR CHARACTERISTICS ppm/°C ± 100 for 0.1 Ω to 0.99 Ω, ± 50 for 1 Ω to 9.9 Ω, ± 20 for 10 Ω and above VAC 1000 for RH/5, RH-10 and RH/25, 2000 for RH/50, 4500 for RH/100 and RH/250 Short Time Overload - 5 × rated power for 5 s Maximum Working Voltage V Insulation Resistance Ω (P x R)1/2 10 000 MΩ minimum dry, 1000 MΩ minimum after moisture test Terminal Strength lb 5 minimum for RH-5 and RH-10, 10 minimum for all others - MIL-PRF-18546 type - meets requirements of ANSI J-STD-002 °C - 55 to + 250 Dielectric Withstanding Voltage Solderability Operating Temperature Range 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 RATED POWER IN % 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 25 AMBIENT TEMPERATURE IN °C Derating is also required when recommended heat sink area is reduced. A = RH-5 and RH-10 size resistor B = RH-25 size resistor C = RH-50, RH-100 and RH-250 size resistor RATED POWER IN % Derating REDUCED HEAT SINK DERATING: 250 100 90 80 A 70 60 B 50 40 C 30 20 10 0 0 20 Heat Sink Derating www.vishay.com 156 For technical questions, contact: [email protected] 40 60 80 100 % OF RECOMMENDED HEAT SINK AREA Document Number: 30201 Revision: 11-Jul-07 RH, NH Wirewound Resistors, Military, MIL-PRF-18546 Qualified, Type RE, Aluminum Housed, Chassis Mount Vishay Dale MATERIAL SPECIFICATIONS SPECIAL MODIFICATIONS Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value A number of special modifications to the aluminum housed resistor style are available upon request. Special modifications include: 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 RH-5 through RH-50 size terminal finish - Tin/lead is 60/40 Sn/Pb w/Nickel underplate and Lead (Pb)-free is Ni/Pd/Au, finish is on copper clad steel core terminal. For RH-100 and RH-250 terminals are threaded stainless steel. • Terminal configurations and materials • Resistance values and tolerances • Low resistance temperature coefficient (RTC) • Housing configuration • Threaded mounting holes • Preconditioning and other additional testing APPLICABLE MIL SPECIFICATIONS Note: Military (RE) parts are only available with tin/lead finish Part Marking: DALE, model, wattage, value, tolerance, date code MIL-PRF-18546 is the military specification covering aluminum housed, chassis mount, power resistors. VISHAY RH and NH resistors are listed as qualified on the MIL-PRF-18546 QPL. NH NON-INDUCTIVE 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 Thermal Shock Rated power applied until thermally stable, then a minimum of 15 min at - 55 °C ± (0.5 % + 0.05 Ω) ΔR Short Time Overload 5 x rated power for 5 s ± (0.5 % + 0.05 Ω) ΔR Dielectric Withstanding Voltage 1000 Vrms for RH-5, RH-10 and RH-25; 2000 Vrms for RH-50 4500 Vrms for RH-100 and RH-250; duration 1 min ± (0.2 % + 0.05 Ω) ΔR Temperature 250 °C for 2 h ± (0.5 % + 0.05 Ω) ΔR Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (1.0 % + 0.05 Ω) ΔR Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 ms, 10 shocks ± (0.2 % + 0.05 Ω) ΔR Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 h each ± (0.2 % + 0.05 Ω) ΔR Load Life 1000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF” ± (1.0 % + 0.05 Ω) ΔR Terminal Strength 30 s, 5 pound pull test for RH-5 and RH-10, 10 pound pull test for other sizes, torque test - 24 pound inch for RH-100 and 32 pound inch for RH-250 ± (0.2 % + 0.05 Ω) ΔR Document Number: 30201 Revision: 11-Jul-07 For technical questions, contact: [email protected] TEST LIMITS www.vishay.com 157 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1