25 min. 25 min. B E RMB, RMBS www.vishay.com Vishay Sfernice Molded Precision Wirewound Resistors Axial Leads FEATURES 0.75 W to 3 W at 25 C NF C 83-210 According to CECC 40201-005 Low temperature coefficient 50 ppm/C Low ohmic values 15 m available Excellent behavior against humidity Electrical insulation Mechanical strength Accurate sizes Termination = Sn / Ag / Cu or pure matte tin according to the ohmic value Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 High stability and low temperature coefficient are the main features of the precision wirewound resistors type RMB RMBS models just as maintenance parts. Their performances can be compared with those of the best film resistors but they have in addition a greater power rating. RMBS styles meet the more severe requirements of NF C 83-210 and characteristic U of MIL-R-26 E (approximate size of RW 70 and 79 resistors) specifications. The two models RMB and RMBS have a similar construction. RMBS are submitted, in addition to a process which further increases the stability. On request, non-inductiv e resistors are available under the reference RMB NI. DIMENSIONS in millimeters SERIES A B WEIGHT AND E 0.1 max. max. g STYLE RMB0.75 7 2.5 0.6 0.3 RMBS0.5 RMB1.5 10.2 4 0.6 0.7 RMBS1 RMB3 16.2 6.4 0.8 1.5 RMBS2 STANDARD ELECTRICAL SPECIFICATIONS RESISTANCE RATED POWER LIMITING ELEMENT TOLERANCE MODEL SIZE RANGE P VOLTAGE 25 C % W V RMB0.75 075 0.1 to 2K 0.75 n/a 0.1, 0.5, 1, 2, 5 RMB1.5 105 0.1 to 6.81K 1.5 120 0.1, 0.5, 1, 2, 5 RMB3 300 0.051 to 13K 3 200 0.1, 0.5, 1, 2, 5 RMBS0.5 05 0.1 to 2K 0.5 n/a 0.1, 0.5, 1, 2, 5 RMBS1 10 0.1 to 6.81K 1 120 0.1, 0.5, 1, 2, 5 RMBS2 20 0.015 to 13K 2 200 0.1, 0.5, 1, 2, 5 Revision: 22-Mar-2019 Document Number: 50010 1 For technical questions, contact: sferfixedresistors 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 A RMB, RMBS www.vishay.com Vishay Sfernice TECHNICAL SPECIFICATIONS VISHAY SFERNICE SERIES AND STYLE RMB0.75 RMB1.5 RMB3 RMBS0.5 RMBS1 RMBS2 NF C 83-210 - - - RP1 RP2 RP3 CECC 40201-005 - - - A B C at 25 C 0.75 W 1.5 W 3 W 0.5 W 1 W 2 W Power Rating at 70 C 0.6 W 1.2 W 2.4 W 0.4 W 0.8 W 1.6 W 0.1 to 0.1 to 0.051 to 0.1 to 0.1 to 0.015 to 5 % E24 2 k 6.81 k 13 k 2 k 6.81 k 13 k 0.1 to 0.1 to 0.08 to 0.1 to 0.1 to 0.078 to 2 % E48 2 k 6.81 k 12.3 k 2 k 6.81 k 12.4 k Ohmic Range in Relation to 0.1 to 0.1 to 0.1 to 0.1 to 0.1 to 0.1 to 1 % E96 Tolerance 2 k 6.81 k 12.4 k 2 k 6.81 k 12.4 k 0.4 to 0.4 to 0.3 to 0.4 to 0.4 to 0.3 to 0.5 % E96 2 k 6.81 k 12.4 k 2 k 6.81 k 12.4 k 0.1 % Please consult Vishay Sfernice Qualified Ohmic Range NF C 83-210 - - - 1 to 174 1 to 590 1 to 1.3 k Limiting Element Voltage Not applicable 120 V 200 V Not applicable 120 V 200 V Critical Resistance Out of nominal ohmic range PERFORMANCE REQUIREMENTS TYPICAL VALUES AND DRIFTS TESTS CONDITIONS MIL-R-26 E NF C 83-210 RMB RMBS Dielectric W/s Voltage 500 V (0.1 % + 0.05 ) - (0.05 % + 0.01 ) (0.05 % + 0.01 ) RMS Short Time Overload 5 P at 25 C/5 s (0.2 % + 0.05 ) 0.25 % + 0.05 (0.1 % + 0.01 ) (0.05 % + 0.01 ) n NF C 83-210 0.25 % + 0.05 (0.1 % + 0.01 ) (0.05 % + 0.01 ) Climatic Sequence -55 C / +200 C - 4 4 Insulation R > 100 M > 10 M > 10 M 5 cycles Humidity NF C 83-210 0.25 % + 0.05 (0.1 % + 0.01 ) (0.05 % + 0.01 ) - 4 4 (Steady State) 56 days 95 % RH Insulation R > 100 M > 10 M > 10 M Load at 100 % P followed Thermal Shock by cold temp. exposure (0.2 % + 0.05 ) - (0.2 % + 0.01 ) (0.1 % + 0.01 ) at -55 C MIL-STD-202 Vibration Method 204 - Test D: 20 g (0.2 % + 0.05 ) 0.25 % + 0.05 (0.01 % + 0.01 ) (0.01 % + 0.01 ) 10/2000 Hz MIL-STD-202 0.25 % + 0.05 Load Life (0.5 % + 0.05 ) (1 % + 0.01 ) (0.15 % + 0.01 ) Method 108 Pr 2000 h 1000 h at 25 C (0.2 % + 0.05 ) MIL-STD-202 (0.1 % + 0.01 ) (0.05 % + 0.01 ) Moisture Resistance Insulation resistance - 3 3 Method 106 > 10 M > 10 M > 100 M 0.5 % + 0.05 High Temperature 1000 h at +200 C (0.5 % + 0.05 ) (1 % + 0.05 ) (0.3 % + 0.05 ) Insulation R > 1 G MIL-STD-202 Shock (0.1 % + 0.05 ) 0.25 % + 0.05 0.05 % 0.05 % 100 g Method 205 Test C TEMPERATURE COEFFICIENT IN THE RANGE -55 C TO +200 C REQUIREMENTS TYPICAL VALUES OHMIC RANGE NF C 83-210 MIL-R-26E SFERNICE MIL R < 1 100 ppm/C n 50 ppm/C 1 R < 10 50 ppm/C n R 10 25 ppm/C +0 C to -20 ppm/C n Revision: 22-Mar-2019 Document Number: 50010 2 For technical questions, contact: sferfixedresistors 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