Wirewound/Metal Film Resistors, Commercial Power, Radial Lead
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- Reynold Osborne
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1 RMW, RMF End-of-Life Product FEATURES High power dissipation in small volume Very stable mounting Non-flammable High pulse load handling capabilities High heat and moisture resistance Various terminal styles Please reference the Vishay Dale closest equivalents: CPR, CPR High Volume or CPR Special Terminals (for CPR datasheet please visit our website: for CPR High Volume datasheet: and for CPR Special Terminals datasheet: Note: There may be slight differences between the and the Vishay Dale crosses TECHNOLOGY RMW: The resistive element is a wire that is wound on a fiberglass core. RMF: The resistive element is a metal film resistor consisting of a metal layer deposited over a high-grade ceramic rod. The terminals are crimped to the resistive body to provide a good mechanical and electrical contact. To ensure a flexible assembling process, the resistors are offered in various terminals styles, such as long or short, one or two pins. The resistor body and lead ends are housed within a rectangular ceramic case which is non-flammable, will not melt even at high overloads and is resistant to most commonly used cleaning solvents, in accordance with IEC STANDARD ELECTRICAL SPECIFICATIONS MODEL POWER RATING RESISTANCE RANGE (1) TOLERANCE (2) P 7 C W Ω % ± 1 RMW K ± ± 1 RMF3 1-39K ± ± 1 RMW K ± ± 1 RMF5 1-51K ± ± 1 RMW K ± ± 1 RMF7 1K - 1K ± ± 1 RMW K ± ± 1 RMF1 1K - 15K ± 5 RMW ± K ± 5 RMW ± K ± 5 Notes: (1) Special resistance values available upon request (2) Other tolerances available upon request E-SERIES Decade Values TECHNICAL SPECIFICATIONS PARAMETER UNIT RMW RMF3 RMF5 RMF7 RMF1 Limiting Voltage V Pn x R Insulation Voltage V > 2 Temperature Coefficient (3) ppm/ C R < 1 Ω: to 6; R 1 Ω: - 8 to + 14; ± 25 Operating Temperature C - 25 to Short Time Overload - 1 x rated power for 5 s Note: (3) Temperature Coefficient of ± 3, 5 and 9 ppm/ºc available on RMW upon request 24 For technical questions, contact: ww2aresistors@vishay.com Document Number: Revision: 19-Feb-8
2 End-of-Life Product RMW, RMF DIMENSIONS in millimeters (inches) L W W H1 H1 a P g k H2 H2 e c b f d j R h i n R l m D TERMINAL STYLE 1 (SINGLE PIN) TERMINAL STYLE 2 (DOUBLE PIN) TYPE L W H1 H2 D (1) P RMW3 RMF3 24. ± 1. (.95 ±.4) 9. ± 1. (.36 ±.4) 9. ± 1. (.36 ±.4) 12.5 ± 1. (.5 ±.4) RMW5 RMF5 RMW7 RMF7 27. ± 1. (1.6 ±.4) 35. ± 1. (1.38 ±.4) 9.5 ± 1. (.38 ±.4) 9.5 ± 1. (.38 ±.4) 1. ± 1.5 (.4 ±.6) or 25. ± 1.5 (.98 ±.6) 3.5 ±.2 (.14 ±.1) or 5. ±.2 (.2 ±.1) 15. ± 1. (.59 ±.4) 22.5 ± 1. (.89 ±.4) RMW1 RMF1 48. ± 1. (1.89 ±.4) 35. ± 1. (1.38 ±.4) RMW15 RMW2 48. ± 1.5 (1.89 ±.6) 63.5 ± 1.5 (2.51 ±.6) 12.5 ± 1.2 (.49 ±.5) 12.5 ± 1. (.49 ±.4) 15. ± 1.5 (2) (.59 ±.6) or 3. ± 1.5 (1.18 ±.6) 5. ±.2 (.2 ±.1) 32.5 ± 1.5 (1.28 ±.6) 47.5 ± 1.5 (1.87 ±.6) Notes: (1) Valid only for terminal style 2 (2) Available only terminal style 1 OTHER DIMENSIONS in millimeters (inches) RMW3, RMF3, RMW5, RMF5, RMW7, RMF7, RMW1 and RMF1 RMW15 and RMW 2 a 5. ±.5 (.2 ±.2) h 1.5 ±.1 (.6 ±.1) a 5. ±.5 (.2 ±.2) h 3. ±.1 (.12 ±.1) b 1.5 ±.1 (.6 ±.1) i 1.4 ±.1 (.6 ±.1) b 1.5 ±.1 (.6 ±.1) i 4.5 ±.2 (.18 ±.1) c 1.8 ±.1 (.7 ±.1) j 4.5 ±.2 (.18 ±.1) c 1.8 ±.1 (.7 ±.1) j 2.7 ±.1 (.11 ±.1) d 1. ±.1 (.4 ±.1) k 7.3 ±.3 (.29 ±.2) d 1. ±.1 (.4 ±.1) k 1.3 ±.3 (.41 ±.2) e.8 ±.1 (.31 ±.1) l 1.5 ±.1 (.6 ±.1) e.8 ±.1 (.32 ±.1) l 2. ±.1 (.8 ±.4) f.5 ±.2 (.2 ±.1) m 1.4 ±.1 (.6 ±.1) f.5 ±.2 (.2 ±.1) m 1.5 ±.1 (.6 ±.4) g 7.3 ±.3 (.29 ±.2) n 4.5 ±.2 (.18 ±.1) g 1.3 ±.3 (.41 ±.2) n 4.5 ±.2 (.18 ±.1) Document Number: 3254 For technical questions, contact: ww2aresistors@vishay.com Revision: 19-Feb-8 2
3 RMW, RMF End-of-Life Product ELECTRICAL CHARACTERISTICS The power that the resistor can dissipate depends on the operating temperature. 1 P max. (%) DERATING T amb ( C) Maximum dissipation (P max. ) in percentage of rated power as a function of the ambient temperature (T amb ) APPLICATION INFORMATION The temperature rise of the terminal (solder spot) and the resistor body (hot spot) as a function of load for terminal styles 1 and 2. Style 1 Style 2 Measuring point TERMINAL STYLE 1 (ONE PIN) SOLDER SPOT H = 1 mm 1 W H = 25 mm 1 W For technical questions, contact: ww2aresistors@vishay.com Document Number: Revision: 19-Feb-8
4 End-of-Life Product RMW, RMF HOT SPOT H = 1 mm 1 W H = 25 mm 1 W 5 5 TERMINAL STYLE 2 (TWO PINS) SOLDER SPOT H = 1 mm 1 W H = 25 mm 1 W 2 2 HOT SPOT 25 2 H = 1 mm 1 W 25 2 H = 25 mm 1 W Document Number: 3254 For technical questions, contact: ww2aresistors@vishay.com Revision: 19-Feb-8 4
5 RMW, RMF End-of-Life Product RESISTOR TYPE: 1, 2 W STYLE 1 AND STYLE 2 SOLDER SPOT and HOT SPOT 6 5 H2 = 3 mm 2 W H2 = 3 mm 2 W ΔT (%) Notes: Application information available on request: Pulse load behavior High frequency behavior (self inductance) Pulse loading capabilities MARKING The resistor is marked with the resistor type designation. The nominal resistance, the tolerance on the resistance, the rated dissipation at T amb = 7 C and the production date (week and year), are printed in black on the resistor body. For values up to 91 Ω the R is used as a decimal point. For values of 1 Ω or higher the letter K is used a decimal point. Example: PHX RMW7 2R2 5 % 221 ORDERING NUMBER The ordering code is indicating the product type, terminal type/length and the ohmic value x x x x x x PRODUCT TYPE Notes: (1) RMW15/RMW2 15. mm (.59") (only for terminal style 1) (2) RMW15/RMW2 3. mm (1.18") TYPE OF TERMINAL TERMINAL LENGTH Example: RMW5 with terminal style 1 and terminal length of 1 mm, 47 Ω, 5 % is For technical questions, contact: ww2aresistors@vishay.com Document Number: Revision: 19-Feb-8 OHMIC VALUE RESISTANCE DECADE RMW3 Style mm (1).22 Ω -.91 Ω 7 1 RMW5 1 (.4") Style 2 1 Ω Ω 8 RMW7 2 pitch 5. mm mm (2) 1 Ω - 91 Ω 9 (.2") 2 RMW1 3 (.98") 1 Ω - 91 Ω 1 RMW15 4 Style 2 1 kω kω 2 RMW2 5 pitch 3.5 mm 5 1 kω - 91 kω 3 RMF3 6 (.14") 1 kω - 15 kω 4 RMF5 7 RMF7 8 RMF1 9 LAST DIGIT
6 End-of-Life Product RMW, RMF NAFTA ORDERING NUMBER The resistor have on ordering code with 16 or 17 digits, first 5 digits for product type and the subsequent digits indicate the resistance value, tolerance and terminal style. R M W 4 7 R J 1 S 1 x PRODUCT TYPES POWER VALUE TERMINAL 5 DIGITS TOL. STYLES FOR UP TO 1 W TERMINAL STYLES FOR 1 UP TO 2 W TERMINAL STYLE 2 ONLY RMW or RMF 3W 1 Ω 1R 1 % K 5W 1 Ω 1R 5 % J 1 mm (.394") 7W 1 Ω 1R one pin 1S1 15 mm (.59") one pin 15S1 3.5 mm (.138") P 1 W 1W 1 kω 1K 1 15W 1 kω 1K 1 mm (.394") 2 W 2W 1 kω 1K two pins 1S2 15 mm (.59") two pins 15S2 25 mm (.984") one pin 25S1 3 mm (1.18") one pin 3S1 25 mm (.984") two pins 25S2 3 mm (1.18") two pins 3S2 NAFTA ORDERING INFORMATION PRODUCT TOLERANCE RMW3 ± 5 %, ± 1 % RMF3 ± 5 % RMW5 ± 5 %, ± 1 % NAFTA ORDERING RMW3Wxxxxxx1S1 RMW3Wxxxxxx25S1 RMW3Wxxxxxx1S2 RMW3Wxxxxxx25S2 RMW3Wxxxxxx1S2P RMW3Wxxxxxx25S2P RMF3Wxxxxxx1S1 RMF3Wxxxxxx25S1 RMF3Wxxxxxx1S2 RMF3Wxxxxxx25S2 RMF3Wxxxxxx1S2P RMF3Wxxxxxx25S2P RMW5Wxxxxxx1S1 RMW5Wxxxxxx25S1 RMW5Wxxxxxx1S2 RMW5Wxxxxxx25S2 RMW5Wxxxxxx1S2P RMW5Wxxxxxx25S2P PACKAGING QUANTITY (pieces) BOX 5 BOX 5 Document Number: 3254 For technical questions, contact: ww2aresistors@vishay.com Revision: 19-Feb-8 6
7 RMW, RMF End-of-Life Product NAFTA ORDERING INFORMATION PRODUCT TOLERANCE RMF5 ± 5 % RMW7 ± 5 %, ± 1 % RMF7 ± 5 % RMW1 ± 5 %, ± 1 % RMF1 ± 5 % RMW15 ± 5 %, ± 1 % RMW2 ± 5 %, ± 1 % NAFTA ORDERING RMF5Wxxxxxx1S1 RMF5Wxxxxxx25S1 RMF5Wxxxxxx1S2 RMF5Wxxxxxx25S2 RMF5Wxxxxxx1S2P RMF5Wxxxxxx25S2P RMW7Wxxxxxx1S1 RMW7Wxxxxxx25S1 RMW7Wxxxxxx1S2 RMW7Wxxxxxx25S2 RMW7Wxxxxxx1S2P RMW7Wxxxxxx25S2P RMF7Wxxxxxx1S1 RMF7Wxxxxxx25S1 RMF7Wxxxxxx1S2 RMF7Wxxxxxx25S2 RMF7Wxxxxxx1S2P RMF7Wxxxxxx25S2P RMW1Wxxxxxx1S1 RMW1Wxxxxxx25S1 RMW1Wxxxxxx1S2 RMW1Wxxxxxx25S2 RMW1Wxxxxxx1S2P RMW1Wxxxxxx25S2P RMF1Wxxxxxx1S1 RMF1Wxxxxxx25S1 RMF1Wxxxxxx1S2 RMF1Wxxxxxx25S2 RMF1Wxxxxxx1S2P RMF1Wxxxxxx25S2P RMW15Wxxxxxx15S1 RMW15Wxxxxxx3S1 RMW15Wxxxxxx3S2 RMW2Wxxxxxx15S1 RMW2Wxxxxxx3S1 RMW2Wxxxxxx3S2 PACKAGING BOX 5 BOX QUANTITY (pieces) Composition of Ohmic Value VALUE 5 DIGITS 1 Ω 1R 1 Ω 1R 1 Ω 1R 1 kω 1K 1 kω 1K 1 kω 1K The ohmic value in the NAFTA ordering code (see table NAFTA ORDERING INFORMATION) is represented by the xxxxx in the middle of the above ordering code. The table Composition of Ohmic Value gives some examples on how to use these 5 digits. Example: RMW5, 47 Ω, 5 %, terminal 1 mm, one pin is RMW5W47RJ1S1 For technical questions, contact: ww2aresistors@vishay.com Document Number: Revision: 19-Feb-8
8 End-of-Life Product RMW, RMF PACKAGING in millimeters (inches) P N M PRODUCT TYPE P M N QUANTITY (pieces) MASS per 1 Units (g) 1 mm lead 25 mm lead 15 mm lead 3 mm lead RMW RMF (12.2) 2 (7.9) 19 (7.5) RMW RMF RMW RMF (11.8) 25 (9.9) 215 (8.5) RMW RMF RMW15 14 (5.5) (13.2) 59 (2.4) 5 RMW2 25 (9.9) TESTS AND REQUIREMENTS Essentially all tests are carried out in accordance with the schedule of IEC publications , category 25/155/56 (rated temperature range - 25 C to C; damp heat, long term, 56 days and along the lines of IEC publications 668-2); Recommended basic climatic and mechanical robustness testing procedure for electronic components and under standard atmosphere conditions according to IEC subclause 5.3, unless otherwise specified. In some instances deviations from IEC applications were necessary for our specified method. PERFORMANCE IEC CLAUSE IEC TEST METHOD Insulation resistance TEST PROCEDURE REQUIREMENTS Voltage proof on insulation Temperature coefficient 5 V DC during 1 min; V-block method 1 V RMS during 1 min; V-block method Between - 25 C and C RMW R < 1 Ω R 1 Ω R ins min. 1 MΩ No damage ΔR/R max. ±.5 % +.5 Ω to 6 ppm/ C - 8 to + 14 ppm/ C RMF ± 25 ppm/ C Document Number: 3254 For technical questions, contact: ww2aresistors@vishay.com Revision: 19-Feb-8 8
9 RMW, RMF End-of-Life Product PERFORMANCE IEC CLAUSE IEC TEST METHOD Short time overload Robustness of resistor body Room temperature P = 1 x Pn; 5 s, V max. for: RMF3 15 V RMF5 2 V RMF7 25 V RMF1 3 V Load 2 ± 1 N (U) Robustness of terminations: (Ua1) Tensile all samples Load 45 N; 1 s (Ta) (Tb) (Na) Solderability (after aging) Resistance to soldering heat Rapid change of temperature (Fc) Vibration 4.23 Climatic sequence: 16 h at 155 C; leads immersed in flux 6, 2 ±.5 s in a solder bath at 235 ± 5 C Thermal shock: 3 s, 35 C 3 min at - 25 C and 3 min C; 5 cycles Frequency 1 a 55 Hz, displacement.75 mm or acceleration 1 g, three directions; total 6 h (3 x 2 h) (Ba) Dry heat 16 h, C (Db) Damp heat (accelerated) 1st cycle 24 h; 25 C to 55 C; 9 to 1 % RH (Aa) Cold 2 h; - 25 C (Db) (Ca) TEST PROCEDURE REQUIREMENTS Damp heat (accelerated) remaining cycles Damp heat (steady state) Endurance (at 7 C) 5 days; 25 C to 55 C; 9 to 1 % RH 56 days; 4 C; 9 to 95 % RH; loaded with.1 Pn 1 h load with Pn; 1.5 h ON and.5 h OFF ΔR/R max. ± 2 % +.1 Ω No damage ΔR/R max. ±.5 % +.5 Ω No damage Good tinning ( 95 % covered) no visible damage ΔR/R max. ± 1 % +.5 Ω No visual damage ΔR/R max. ± 1 % +.5 Ω No damage ΔR/R max. ± 1 % +.5 Ω ΔR/R max. ± 1 % +.5 Ω ΔR/R max. ± 3 % +.1 Ω ΔR/R max. ± 5 % +.1 Ω For technical questions, contact: ww2aresistors@vishay.com Document Number: Revision: 19-Feb-8
10 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. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91 Revision: 18-Jul-8 1
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