MRA www.vishay.com Vishay Mills Wirewound Resistors, Non-Magnetic, Non-Inductive, Axial Lead FEATURES High temperature coating (> 350 C) Non-magnetic and all welded constructions greatly enhance frequency response. Combined with non-inductive Ayrton-Perry winding the inductive reactance and signal loss are almost totally eliminated. Ideal for Audio Industry Material categorization: For definitions of compliance please see www.vishay.com/doc 99912 STANDARD ELECTRICAL SPECIFICATIONS (1) (1) POWER RATING POWER RATING RESISTANCE WEIGHT (2) GLOBAL HISTORICAL TOLERANCE P W P W RANGE (typical) 25 C 25 C MODEL MODEL % CHARACTERISTIC U + 250 C CHARACTERISTIC V + 350 C g MRA-05 MRA05 4.0 5.0 1, 5, 10 0.01 to 15.0K 1.00 MRA-10 MRA10 7.0 10.0 1, 5, 10 0.05 to 35.0K 3.87 MRA-12 MRA12 10.0 12.0 1, 5, 10 0.05 to 85.0K 5.02 Notes (1) Vishay Mills MRA models have two power ratings depending on the operation temperature and stability requirements. (2) Other tolerances may be available, contact factory TECHNICAL SPECIFICATIONS PARAMETER UNIT MRA 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 10 minimum Dielectric Withstanding Voltage V 500 for MRA-05 and 1000 for MRA-10 and MRA-12 AC Operating Temperature Range C Characteristic U = - 65 to + 250, Characteristic V = - 65 to + 350 1/2 Maximum Working Voltage V (P x R) GLOBAL PART NUMBER INFORMATION Global Part Numbering example: MRA-1225R00JE12 (visit www.vishay.net Vishay Dale parts numbering manual for all options) M RA - 1 2 2 5 R0 0 J E 1 2 GLOBAL MODEL VALUE TOLERANCE PACKAGING CODE SPECIAL (6 digits) (5 digits) (1 digit) (3 digits) (up to 2 digits) (See Standard Electrical R = Decimal F = 1.0 % E07 = Tape/reel (MRA-10, MRA-12) (Dash Number) Specifications Global K = Thousand J = 5.0 % E48 = Tape/reel (MRA-05) From 1 to 99 Model column 1R500 = 1.5 K = 10.0 % E12 = Bulk, up to 100 pc boxes as applicable for options) 1K500 = 1.5 k Historical Part Number example: MRA12W25R0J MRA12 W = STANDARD 25 5 % HISTORICAL MODEL TC RESISTANCE VALUE TOLERANCE Revision: 02-May-12 Document Number: 31801 1 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 MRA www.vishay.com Vishay Mills DIMENSIONS in inches millimeters D 1.50 38.10 L min. LD 1 L DIMENSIONS in inches millimeters MODEL L D LD 1 L Max. 0.062 1.57 0.031 0.79 0.002 0.051 MRA-05 0.562 14.27 0.650 16.51 0.167 4.24 0.032 0.813 MRA-10 0.875 22.22 0.975 24.76 0.312 7.92 0.040 1.016 MRA-12 1.188 30.18 1.280 32.51 0.312 7.92 0.040 1.016 MATERIAL SPECIFICATIONS DERATING 120 Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value 100 Core: Ceramic: Alumina 80 Coating: Special high temperature silicone Characteristic V 60 Standard Terminals: Tinned copper 40 End Caps: Copper alloy Characteristic U 20 Part Marking: MILLS, model, value, tolerance, date code 0 - 50 0 50 150 250 350 - 65 25 AMBIENT TEMPERATURE IN C PERFORMANCE TEST LIMITS TEST CONDITIONS OF TEST (CHARACTERISTIC U) (CHARACTERISTIC V) Dielectric Withstanding 1000 V , 1 min (0.1 % + 0.05 ) R (0.1 % + 0.05 ) R RMS Voltage High Frequency Frequency varied 10 Hz to 2000 Hz, 20 g peak, (0.1 % + 0.05 ) R (0.2 % + 0.05 ) R Vibration 2 directions 6 h each High Temperature 250 h at + 250 C for U Characteristic, (0.5 % + 0.05 ) R (4.0 % + 0.05 ) R Exposure + 350 C for V Characteristic Load Life 2000 h at rated power, + 25 C, 1.5 h ON, 0.5 h OFF (0.5 % + 0.05 ) R (3.0 % + 0.05 ) R Low Temperature - 65 C for 24 h (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R Storage Moisture Resistance MIL-STD 202 Method 106 (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R Shock, Specified Pulse MIL-STD 202 Method 213, 100 gs for 6 ms, 10 shocks (0.1 % + 0.05 ) R (0.2 % + 0.05 ) R Rated power applied until thermally stable, Thermal Shock (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R then 15 min at - 55 C 5 x rated power (5 W smaller), Short Time Overload (0.2 % + 0.05 ) R (2.0 % + 0.05 ) R 10 x rated power (7 W and larger) for 5 s 5 s to 10 s 10 pound pull test Terminal Strength (0.1 % + 0.05 ) R (1.0 % + 0.05 ) R torsion test - 3 alternating directions, 360 each Revision: 02-May-12 Document Number: 31801 2 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 RATED POWER IN %