Military Established Reliability Vishay Ultronix Military Established Reliability MIL-PRF-39005, Type RBR, MIL-R-93, Type RB, QPL Approved FEATURES * High precision * All welded construction * Molded thermosetting plastic bobbin * Wide ohmic range combined with tight tolerances * Excellent long-term stability * Inherent low temperature coefficient * Extremely low thermal EMF * Low voltage coefficient * Low noise * Complete traceability of materials and processing ELECTRICAL SPECIFICATIONS Minimum Values: 0.1 for 1% 10 ohm for 0.1% and tighter. (Except RBR74 =100 and RBR76 =18.36 ) Resistance Tolerance: 0.01%, 0.02%, 0.05%, 0.1%, and 1.0%, depending on style and value. Temperature Coefficient: (MIL spec requirements) Less than 1, 90 ppm/C. 1 to < 10, 30 ppm/C. 10 to < 100, 15 ppm/C, 100 and above, 10ppm/C. Dielectric Strength: 750VRMS, one minute. Insulation Resistance: Meets requirements of MIL-STD-202, Method 302. Short Time Overload: Twice rated power. STANDARD ELECTRICAL SPECIFICATIONS MAXIMUM RES. VALUE (Ohms) MILITARY TYPE MIL-R93 -- MIL-PRF39005 RBR74 RBR75 RBR56 RBR71 RBR55 RBR54 RBR53 RBR76 RBR52 RBR57 RB56 RB71 RB55 RB54 RB53 -- RB52 RB57 MIL-PRF39005 6.52k 150k 220k 150k 332k 562k 1.1M 3.344k 1.21M 1.37M MIL-R93 -- 42k 100k 80k 170k 320k -- 610k 830k POWER RATING @ 125C MAXIMUM (Watts) VOLTAGE 0.125 150 0.125 150 0.125 150 0.125 150 0.150 200 0.250 300 0.333 300 0.500 300 0.500 600 0.750 600 % OF RATED POWER DERATING MECHANICAL SPECIFICATIONS Resistance Element: Nickel chromium alloy. Core: Molded thermosetting alkyd polyester. Encapsulation: Molded thermosetting alkyd polyester. Terminals: Hot solder dipped copper. Solderability: Meets requirements of MIL-STD-202, Method 208. Moisture Resistance: Meets requirements of MIL-STD-202, Method 106. Terminal Strength: Meets requirements of MIL-STD-202, Method 211. Shock: Meets requirements of MIL-STD-202, Method 213. Vibration (high frequency): Meets requirements of MILSTD-202, Method 204. APPLICATIONS High reliability programs require a resistor that is electrically and mechanically sound. The RBR series design represents the ultimate wirewound resistor to meet these demanding requirements. Production methods with in-place quality control systems allow complete traceability of materials and processing with documented back-up. PART MARKING -- Source code 125 -- Date code and "JAN" marking 100 75 -- Type designation* 50 -- Manufacturer's production lot code 25 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE (C) The power ratings listed in the tables are based upon achieving the specified stabilities at maximum ambient temperatures of + 125C. If a resistor is to be used at a higher ambient temperature, the power should be derated linearly to zero at + 145C. www.vishay.com 8 JAN AND J MARKING Resistors procured to MIL-PRF-39005 and meeting all required specifications shall bear the "JAN" mark, except those resistors too small shall bear the letter "J". Resistors furnished under contracts or orders which permit or require deviations from the applicable detail specifications shall not bear "JAN" or "J". Document Number: 69103 Revision 06-Oct-00 Military Established Reliability Military Established Reliability Vishay Ultronix RBR75 CONSTRUCTION 4 All Welded Construction: The combination of all welded construction and compatible materials provide the most reliable means of interconnects possible. Butt Weld of Tab to Lead: A tab material of 800 alloy (the same as the resistance wire) is butt welded to the lead and molded deep into the resistor bobbin. This design parameter assures the least possible D.C. transients due to thermal EMF. Bobbin Design: The ratio of the height of the Pi wall to the width of the Pi and to the diameter of the bobbin mandrel are critical to the basic stability of a wirewound resistor. These parameters are optimized for each wire size, wattage size and range of resistor values. Encapsulation Material: Both the bobbin and the final encapsulation material are alkyd polyesters. The resulting resistor is virtually a homogeneous mass with compatible coefficients of expansion. All types are unaffected by application of solvents. Lead Materials: The standard lead materials are hot solder dipped copper (C5N) for solderable terminals and nickel (N1N) for weldable terminals. 1 2 5 6 3 1. 2. 3. 4. 5. 6. Welded Lead-Tab Assembly, (Molded in Place). Molded Thermosetting Alkyd Polyester Bobbin. Molded Thermosetting Alkyd Polyester Encapsulation. Stress Relief Coating. Resistance Wire. Sandwich-Welded Termination. DIMENSIONS in inches [millimeters] RBR71 Axial Models 1.5 [38.1] Min. B A * * A C B 1Min. [25.4] RBR DIMENSIONS A MODEL RBR74 RBR75 RBR56 RBR71 RBR55 RBR54 RBR53 RBR76 RBR52 RBR57 Nom. B Tol. Nom. 0.193 [4.90] 0.010 [0.254] 0.500 [12.70] 0.250 [6.35] 0.015 [0.381] 0.295 [7.49] 0.250 [6.35] 0.015 [0.381] 0.344 [8.74] 0.250 [6.35] 0.031 [0.787] 0.312 [ 7.92] 0.250 [6.35] 0.015 [0.381] 0.500 [12.70] 0.250 [6.35] 0.015 [0.381] 0.750 [19.05] 0.375 [9.53] 0.015 [0.381] 0.750 [19.05] 0.312 [7.92] 0.015 [0.381] 0.812 [20.63] 0.375 [9.53] 0.015 [0.381] 1.00 [25.40] 0.500 [12.7] 0.015 [0.381] 1.00 [25.40] C Tol. 0.020 [0.508] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] 0.031 [0.787] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] + 0.020 [0.508] - 0.032 [0.813] LEADS AWG Diameter -- 22 0.026 [0.660] -- 22 0.026 [0.660] -- 20 0.032 [0.813] 0.200 [5.08] 0.010 [0.254] 22 0.026 [0.660] -- 20 0.032 [0.813] -- 20 0.032 [0.813] 20 0.032 [0.813] -- 20 0.032 [0.813] -- 20 0.032 [0.813] -- 20 0.032 [0.813] ENVIRONMENTAL PERFORMANCE TEST Power Conditioning Thermal Shock Short Time Overload Moisture Resistance Resistance to Soldering Shock Vibration Load Life Terminal Strength CONDITIONS REQUIREMENTS* (MIL-R-39005) .01% 100 hours at rated power at + 125C .05% MIL-STD-202, Method 102 Twice rated power for 10 minutes .01% MIL-STD-202, Method 106 .10% MIL-STD-202, Method 210 .01% .01% 20 shocks, 6 ms sawtooth at 100g MIL-STD-202, Method 204 .01% 10,000 hours at rated power at + 125C .20% MIL-STD-202, Method 211 (pull-twist) .01% MAX. R* (Typical Test Lots) .006% .003% .005% 0.04% .002% .005% .005% .010% .005% * Add .01 ohm below 10 ohm. All readings at dry state. ORDERING INFORMATION RBR52 SERIES L TERMINAL L = Solderable U = Weldable Document Number: 69103 Revision 06-Oct-00 12601 RESISTANCE VALUE MIL code 1R260 126R0 12600 12601 12602 12603 Value 1.26 Ohms 126 Ohms 1.26 K-Ohms 12.6 K-Ohms 126 K-Ohms 1.26 Megohms F TOLERANCE M FAILURE RATE T = 0.01% Q = 0.02% M = 1.0% A = 0.05% B = 0.1% P = 0.1% R = 0.01% F = 1.0% www.vishay.com 9