RMB, RMBS Vishay Sfernice Molded Precision Wirewound Resistors Axial Leads FEATURES * * * * * * * * * * 0.75 W to 3 W at 25 C NF C 83-210 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 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 (all RMBS styles are approved) 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-inductive resistors are available under the reference RMB NI. DIMENSIONS in millimeters 25 min. OE A SERIES AND STYLE 25 min. OB RMB 0.75 RMBS 0.5 RMB 1.5 RMBS 1 RMB 3 RMBS 2 A max. 7 10.2 16.2 O B max. 2.5 4 6.4 E 0.1 0.6 0.6 0.8 Weight in g 0.3 0.7 1.5 RMBS 1 RMBS 2 TECHNICAL SPECIFICATIONS VISHAY SFERNICE SERIES AND STYLE RMB 0.75 RMB 1.5 RMB 3 NF C 83-210 - - - RP1 RP2 RP3 CECC 40201-005 - - - A B C at 25 C 0.75 W 1.5 W 3W 0.5 W 1W 2W at 70 C 0.6 W 1.2 W 2.4 W 0.4 W 0.8 W 1.6 W 5 % E24 0.1 2 k 0.1 6.81 k 0.051 13 k 0.1 2 k 0.1 6.81 k 0.015 13 k 2 % E48 0.1 2 k 0.1 6.81 k 0.08 12.3 k 0.1 2 k 0.1 6.81 k 0.078 12.4 k 1 % E96 0.1 2 k 0.1 6.81 k 0.1 12.4 k 0.1 2 k 0.1 6.81 k 0.1 12.4 k 0.5 % E96 0.4 2 k 0.4 6.81 k 0.3 12.4 k 0.4 2 k 0.4 6.81 k 0.3 12.4 k Power Rating Ohmic Range in Relation to Tolerance Please consult VISHAY SFERNICE 0.1 % Qualified Ohmic Range NF C 83-210 Limiting Element Voltage RMBS 0.5 - - - 1 174 1 590 1 1.3 k Not applicable 120 V 200 V not applicable 120 V 200 V Critical Resistance Out of nominal ohmic range Undergoes European Quality Insurance System (CECC) www.vishay.com 44 For technical questions, contact: sfer@vishay.com Document Number: 50010 Revision: 21-Jan-08 RMB, RMBS Molded Precision Wirewound Resistors Axial Leads Vishay Sfernice PERFORMANCE TESTS REQUIREMENTS CONDITIONS TYPICAL VALUES AND DRIFTS MIL-R-26 E NF C 83-210 RMB RMBS Dielectric W/s Voltage 500 VRMS (0.1 % + 0.05 ) - (0.05 % + 0.01 ) (0.05 % + 0.01 ) Short Time Overload 5 Pn at 25 C/5 s (0.2 % + 0.05 ) 0.25 % + 0.05 (0.1 % + 0.01 ) (0.05 % + 0.01 ) Climatic Sequence NF C 83-210 - 55 C/+ 200 C 5 cycles - 0.25 % + 005 (0.1 % + 0.01 ) (0.05 % + 0.01 ) Insulation R > 100 M > 104 M > 104 M NF C 83-210 56 days 95 % R.H. - 0.25 % + 0.05 (0.1 % + 0.01 ) (0.05 % + 0.01 ) > 104 M Insulation R > 100 M > 104 M Thermal Shock Load at 100 % P followed by cold temp. exposure at - 55 C (0.2 % + 0.05 ) - Vibration MIL-STD-202 Method 204 - Test D: 20 g 10/2000 Hz (0.2 % + 0.05 ) 0.25 % + 0.05 Load Life MIL-STD-202 Method 108 Pr 2000 h (0.5 % + 0.05 ) 0.25 % + 0.05 1000 h at 25 C MIL-STD-202 Method 106 (0.2 % + 0.05 ) Insulation resistance > 100 M - 1000 h at + 200 C (0.5 % + 0.05 ) 0.5 % + 0.05 Insulation R > 1 G 1% 0.3 % MIL-STD-202 100 g Method 205 Test C (0.1 % + 0.05 ) 0.25 % + 0.05 0.05 % 0.05 % Humidity (Steady State) Moisture Resistance High Temperature Shock (0.2 % + 0.01 ) (0.1 % + 0.01 ) (0.01 % + 0.01 ) (0.01 % + 0.01 ) (1 % + 0.01 ) (0.15 % + 0.01 ) (0.1 % + 0.01 ) (0.05 % + 0.01 ) > 103 M > 103 M TEMPERATURE COEFFICIENT IN THE RANGE - 55 C TO + 200 C REQUIREMENTS NF C 83-210 MIL-R-26E OHMIC RANGE TYPICAL VALUES SFERNICE MIL 100 ppm/C Rn < 1 50 ppm/C 1 Rn < 10 50 ppm/C Rn 10 25 ppm/C + 0 to - 20 ppm/C STABILITY AND POWER RATING Stability changes slightly according to power rating and ambient temperature. This fact is specially important for users needing a life drift lower than the initial resistance tolerance. Typical drifts, after 2000 h life test made under the 90'/30' conditions and at a 25 C ambient temperature are: MODEL STYLE RMBS 0.5 RMBS 1 RMBS 2 R% R% MODEL STYLE RMB 0.75 RMB 1.5 RMB 3 R% R% Pn 0.5 W 1W 2W 0.15 % P max. 1W 2W 3.5 W 1% 1/2 Pn 0.25 W 0.5 W 1W 0.075 % Pn 0.75 W 1.5 W 3W 0.5 % 1/3 Pn 0.4 W 0.75 W 1.5 W 0.3 % Document Number: 50010 Revision: 21-Jan-08 For technical questions, contact: sfer@vishay.com www.vishay.com 45 RMB, RMBS Molded Precision Wirewound Resistors Axial Leads Vishay Sfernice POWER RATING CHART 125 % RATED POWER 100 75 50 37 25 0 0 50 100 150 200 250 275 300 350 AMBIENT TEMPERATURE IN DEGREES CELSIUS TEMPERATURE RISE RM BS HOT SPOT TEMPERATURE IN C 0. 5 250 0. 7 5 200 RM B BS RM 1 RM B 2 3 RM B 150 RM 5 1. BS 100 50 0 0 1 2 3 RATED POWER IN WATTS MARKING SFERNICE trademark, model, style, CECC style (if applicable) nominal resistance (in ), tolerance (in %), manufacturing date. ORDERING INFORMATION RMB 1.5 RMBS 0.5 MODEL STYLE U5 BA100NA e3 (e1: RMB3) 22U 5% BA100 e1 (e3: RMBS 0.5 < 1 R RMBS 1 < 3.52 R) SPECIAL DESIGN OHMIC VALUE TOLERANCE PACKAGING LEAD (Pb)-FREE Method N Optional Custom items are subject to extra-charge and min. order. Please see price list. NON INDUCTIVE WINDING "Ni" Optional 5% Optional SAP PART NUMBERING GUIDELINES RMB 105 R5000 J S00 RMBS 05 22R00 J S14 MODEL STYLE OHMIC VALUE TOLERANCE PACKAGING www.vishay.com 46 For technical questions, contact: sfer@vishay.com Document Number: 50010 Revision: 21-Jan-08 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. 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 herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. 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