MRB VISHAY

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www.vishay.com Vishay Mills Revision: 07-May-12 1 Document Number: 31802 For technical questions, contact: ww2aresistors@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Wirewound Resistors, Commercial Power, Silicone Coated, Axial Lead

FEATURES

  • High temperature coating (> 350 °C)
  • Complete welded construction
  • Available in non-inductive styles with Ayrton-Perry winding for lowest reactive components, special “NI”
  • Higher power to size ratio as compared to equivalent sized resistors
  • Material categorization: For definitions of co mpliance please see www.vishay.com/doc?99912 Notes (1) Vishay Mills MRB models have two power ratings depending on operation temperature and stability requirements. (2) Other tolerances may be available, contact factory STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL POWER RATING (1) P25 °C W CHARACTERISTIC U + 250 °C POWER RATING (1) P25 °C W CHARACTERISTIC V + 350 °C TOLERANCE (2) RESISTANCE RANGE WEIGHT (typical) g TECHNICAL SPECIFICATIONS PARAMETER UNIT MRB RESISTOR CHARACTERISTICS Temperature Coefficient ppm/°C ± 30 for 10  and above; ± 50 for 1.0  to 9.9 ; ± 90 for 0.5  to 0.99  Terminal Strength lb 5 min (MRB01 thru MRB03) and 10 min (MRB05 and larger) Dielectric Withstanding Voltage V AC 500 for 3 W and smaller; 1000 for 4 W and larger Operating Temperature Range °C Characteristic U = - 65 to + 250, Characteristic V = - 65 to + 350 Maximum Working Voltage V ( P x R)1/2 GLOBAL PART NUMBER INFORMATION Global Part Numbering example: MRB02250R0FE08 (visit www.vishay.net Vishay Dale parts numbering manual for all options) GLOBAL MODEL (5 digits) VALUE (5 digits) TOLERANCE (1 digit) PACKAGING CODE (3 digits) SPECIAL (up to 3 digits) (See Standard Electrical Specifications Global Model column for options) R = Decimal K = Thousand 1R500 = 1.5  1K500 = 1.5 k D = ± 0.5 % F = ± 1.0 % J = ± 5.0 % E07 = Tape/reel (MRB10, MRB12) E08 = Tape/reel (MRB01, MRB02, MRB03) E48 = Tape/reel (MRB05, MRB06) E12 = Bulk, up to 100 pc boxes (Dash Number) From 1 to 999 as applicable NI = Non-inductive Historical Part Number example: MRB02W250R0F MRB02 W = STANDARD 250  1 % HISTORICAL MODEL TC RESISTANCE VALUE TOLERANCE R B02250 R0FE0 8M

www.vishay.com Vishay Mills Revision: 07-May-12 2 Document Number: 31802 For technical questions, contact: ww2aresistors@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 DIMENSIONS in inches [millimeters] MATERIAL SPECIFICATIONS Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value Core: Ceramic: Alumina Coating: Special high temperature silicone Standard Terminals: Tinned copper clad steel End Caps: Stainless steel Part Marking: MILLS, model, value, tolerance, date code DERATING MODEL DIMENSIONS in inches [millimeters] L ± 0.062 [1.57] L1 Max. D ± 0.031 [0.79] LD ± 0.002 [0.051] 1.50 [38.10] min. L D LD RATED POWER IN % AMBIENT TEMPERATURE IN °C 120 100 25- 65 - 50 250 50 3500 150 Characteristic U Characteristic V PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS (CHARACTERISTIC U) (CHARACTERISTIC V) Dielectric Withstanding Voltage 500 V RMS, 1 min (MRB01 thru MRB03); 1000 VRMS, 1 min for all others ± (0.1 % + 0.05 ) R ± (0.1 % + 0.05 ) R High Frequency Vibration Frequency varied 10 Hz to 2000 Hz, 20 g peak, 2 directions 6 h each ± (0.1 % + 0.05 ) R ± (0.2 % + 0.05 ) R High Temperature Exposure 250 h at + 250 °C for U Characteristic, + 350 °C for V Characteristic ± (0.5 % + 0.05 ) R ± (4.0 % + 0.05 ) R Low Temperature Moisture Resistance MIL-STD-202 Method 10 6, 7b not applicable ± (0.2 % + 0.05 ) R ± (2.0 % + 0.05 ) R Shock, Specified Pulse MIL -STD-202 Method 213, 100 g’s for 6 ms, 10 shocks ± (0.1 % + 0.05 ) R ± (0.2 % + 0.05 ) R Thermal Shock Rated power applied until thermally stable, R Short Time Overload 5 x rated power (3 W and smaller), 10 x rated power (4 W and larger) for 5 s ± (0.2 % + 0.05 ) R ± (2.0 % + 0.05 ) R Terminal Strength Pull test 5 s to 10 s, 5 lb (MRB01 thru MRB03), 10 lb for all others; torsion test - 3 alternating directions, 360 ° each ± (0.1 % + 0.05 ) R ± (1.0 % + 0.05 ) R

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