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) RESISTANCE WEIGHT GLOBAL HISTORICAL TOLERANCE (2) P W P W RANGE (typical) MODEL MODEL 25 °C 25 °C % 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 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 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 1 Document Number: 31801 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] 1.50 [38.10] D L min. LD L1 DIMENSIONS in inches [millimeters] MODEL L D LD L1 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 Element: Copper-nickel alloy or nickel-chrome alloy, % 120 depending on resistance value N R I 100 Core: Ceramic: Alumina E W 80 Coating: Special high temperature silicone PO Characteristic V D 60 Standard Terminals: Tinned copper E T A 40 End Caps: Copper alloy R Characteristic U Part Marking: MILLS, model, value, tolerance, date code 20 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 Voltage 1000 VRMS, 1 min ± (0.1 % + 0.05 ) R ± (0.1 % + 0.05 ) R 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 g’s 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 2 Document Number: 31801 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

Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROV E 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 o r the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustainin g applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk . Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this documen t or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. © 2019 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED Revision: 01-Jan-2019 1 Document Number: 91000