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 POWER RATING (1) POWER RATING (1) TOLERANCE (2) P25 °C W P25 °C W % CHARACTERISTIC U + 250 °C CHARACTERISTIC V + 350 °C RESISTANCE RANGE WEIGHT (typical) g 1, 5, 10 0.01 to 15.0K 1.00 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 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 5.02 GLOBAL MODEL HISTORICAL MODEL MRA-05 MRA05 4.0 5.0 MRA-10 MRA10 7.0 10.0 TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient UNIT MRA RESISTOR CHARACTERISTICS 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 VAC 500 for MRA-05 and 1000 for MRA-10 and MRA-12 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: MRA-1225R00JE12 (visit www.vishay.net Vishay Dale parts numbering manual for all options) M R A - 1 2 2 5 R 0 0 J E 1 2 GLOBAL MODEL (6 digits) VALUE (5 digits) TOLERANCE (1 digit) PACKAGING CODE (3 digits) SPECIAL (up to 2 digits) (See Standard Electrical Specifications Global Model column for options) R = Decimal K = Thousand 1R500 = 1.5 1K500 = 1.5 k F = ± 1.0 % J = ± 5.0 % K = ± 10.0 % E07 = Tape/reel (MRA-10, MRA-12) E48 = Tape/reel (MRA-05) E12 = Bulk, up to 100 pc boxes (Dash Number) From 1 to 99 as applicable 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: [email protected] 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] 1.50 [38.10] min. D L LD L1 DIMENSIONS in inches [millimeters] MODEL L ± 0.062 [1.57] L1 Max. D ± 0.031 [0.79] LD ± 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] Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value Core: Ceramic: Alumina Coating: Special high temperature silicone Standard Terminals: Tinned copper End Caps: Copper alloy RATED POWER IN % DERATING MATERIAL SPECIFICATIONS Part Marking: MILLS, model, value, tolerance, date code 120 100 80 Characteristic V 60 40 Characteristic U 20 0 - 50 - 65 0 50 25 150 250 350 AMBIENT TEMPERATURE IN °C PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS (CHARACTERISTIC U) (CHARACTERISTIC V) Dielectric Withstanding Voltage 1000 VRMS, 1 min ± (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 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 Storage - 65 °C for 24 h ± (0.2 % + 0.05 ) R ± (2.0 % + 0.05 ) R 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 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, then 15 min at - 55 °C ± (0.2 % + 0.05 ) R ± (2.0 % + 0.05 ) R Short Time Overload 5 x rated power (5 W smaller), 10 x rated power (7 W and larger) for 5 s ± (0.2 % + 0.05 ) R ± (2.0 % + 0.05 ) R Terminal Strength 5 s to 10 s 10 pound pull test; torsion test - 3 alternating directions, 360 ° each ± (0.1 % + 0.05 ) R ± (1.0 % + 0.05 ) R Revision: 02-May-12 Document Number: 31801 2 For technical questions, contact: [email protected] 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 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 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 in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21 conform to JEDEC JS709A standards. Revision: 02-Oct-12 1 Document Number: 91000