RA www.vishay.com Vishay Sfernice Wirewound Resistor, Industrial High Power, Enamelled Tubular, Adjustable FEATURES • 21 W to 180 W at 25 °C • NF C 93-214 - RBA 13 x 70 - RBA 20 x 117 - RBA 25 x 168 • Material categorization: for definitions of compliance ”B” Ring please see www.vishay.com/doc?99912 The ceramic tubular core ensures high dissipation capacity and excellent resistance to thermal shock and overload. The resistor winding is evenly coiled on the core and protected by an enamel coating. A longitudinal opening provides for one or more electrical connections by means of sliding collars equipped with a tongued connector. DIMENSIONS in millimeters WELDED STAINLESS STEEL 304 L COLLAR “AN” TYPE 1 WELDED STAINLESS STEEL 304 L BAND “B” M A K Ø 4.2 F ØS 45° 45° ØC R V D O J X ØB E ØB ØC T Z A SCREWED STAINLESS STEEL 304 L “CS” TYPE 1 45° A P H ØB 26 Q L N RA SERIES 15 U ØB MAX. ØC MIN. D E + 0.5 +0 F + 0.5 +0 H ±1 J MAX. K MAX. L-0 -4 M N-0 -4 70 16 5 16 ± 0.5 7 10.5 - 19.5 24 - 56 ± 2 - CONNECTION A ± 2 13 x 70 AN-B (1) 16 x 94 AN-B 94 19.5 9 17.5 ± 0.5 8 12 - 23 29.5 - 78 ± 2 - 20 x 117 AN-B 117 23 9 21 ± 0.7 8 14 - 25 31.5 - 98 ± 2 - 25 x 138 AN-B-CS 138 28 12 23.5 ± 1 8 15 27 27.5 34 199 117 ± 2 169 25 x 168 AN-B-CS 168 28 12 23.5 ± 1 8 15 27 27.5 34 229 147 ± 2 199 30 x 250 AN-B-CS 250 33 17 26 ± 1 8 18 30 30 36.5 317 227 ± 2.5 287 P ± 1.5 Q ± 0.5 R S T U V X Z AVERAGE UNIT WEIGHT IN g 3.5 40 RA SERIES O CONNECTION MAX. 13 x 70 AN-B (1) 24.5 - - 24 ± 0.5 4.2 6.35 - 20 ± 0.5 34.5 ± 1 16 x 94 AN-B 28 - - 26.5 ± 0.5 4.2 6.35 - 21 ± 0.5 38 ± 1 5 70 20 x 117 AN-B 33 - - 31 ± 0.7 4.2 6.35 - 24 ± 0.7 42 ± 1 6 116 25 x 138 AN-B-CS 38.5 50 24 33.5 ± 1 5.7 9 6.5 28 ± 1 51 ± 1.5 6 200 25 x 168 AN-B-CS 38.5 50 24 33.5 ± 1 5.7 9 6.5 28 ± 1 51 ± 1.5 6 225 30 x 250 AN-B-CS 43.5 60 25 36 ± 1 5.7 13 9 33 ± 1 55 ± 1.5 5 415 Note (1) Also with CS and CR collars; see RW datasheet. Revision: 16-Mar-16 Document Number: 50019 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 RA www.vishay.com Vishay Sfernice STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE RESISTANCE RANGE RATED POWER P25 °C W TOLERANCE ±% RA 13 x 70 1370 33 to 3.9K 21 10 RA 16 x 94 1694 68 to 3.9K 35 10 RA 20 x 117 20117 100 to 4.7K 50 10 RA 25 x 138 25138 150 to 6.8K 75 10 RA 25 x 168 25168 220 to 10K 120 10 RA 30 x 250 30250 330 to 22K 180 10 MECHANICAL SPECIFICATIONS Mechanical Protection TECHNICAL SPECIFICATIONS Vitreous enamel Resistive Element 33 to 22K (E6 series) Resistance Range Ni-Cr wire Tolerance Standard B band AN or CS collar Connections Average Unit Weight ± 10 % Power Rating 21 W to 180 W at 25 °C 40 g to 415 g ENVIRONMENTAL SPECIFICATIONS Temperature Range -55 °C, +350 °C Climatic Category -55 °C / +200 °C / 56 days PERFORMANCE TESTS CONDITIONS REQUIREMENTS TYPICAL VALUES AND DRIFTS 10 Pr 5 s Voltage < 6000 V 2 % or 0.05 0.5 % 5 cycles 3 % or 0.05 Insulation resistance > 100M 1% Humidity (Steady State) 56 days 95 % RH 2 % or 0.05 Insulation resistance > 100M 0.5 % Thermal Shock Load at Pr followed by exposure at -55 °C / 15 2 % or 0.05 0.5 % 200 N ± 10 N 2 % or 0.05 0.25 % 55/10 1 % (1) or 0.05 0.5 % Traction 40 Ncm Torque 60 Ncm 1 % or 0.05 0.25 % 1000 h at Pr, 25 °C, 90' / 30' 5% 1.5 % Short Time Overload -55 °C Climatic Sequence Resistor Strength Vibration Terminal Strength AN B Load Life +200 °C Note (1) 1 % of total resistance and 2 % between sliding collar and fixed connection. SPECIAL FEATURES RA STYLE Designation NF C 93-214 13 x 70 16 x 94 20 x 117 25 x 138 25 x 168 30 x 250 RBA 13 x 70 - RBA 20 x 117 - RBA 25 x 168 - Power Rating NF C 93-214 at 25 °C 13 W - 25 W - 50 W - Maximum Power Rating at 25 °C 21 W 35 W 50 W 75 W 120 W 180 W 33 to 3.9K 68 to 3.9K 100 to 4.7K 150 to 6.8K 220 to 10K 330 to 22K Ohmic Range (E6, E24 series) ADMISSIBLE RATED AMPERAGE This must in all cases be less than: In = Pn W ----------------Rn Revision: 16-Mar-16 Document Number: 50019 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 RA www.vishay.com Vishay Sfernice SLIDING COLLAR Resistors are normally supplied with 1 sliding collar fi tted and locked in a specific position. Additional collars can be supplied and adjusted at the factory to special order (on request). (1) Note (1) Quote ohmic value and tolerance of each resistance section, and Rn value. MAXIMUM ADDITIONAL COLLARS MODEL AND TYPE Additional Sliding Collar RA 13 x 70 RA 16 x 94 RA 20 x 117 RA 25 x 138 RA 25 x 168 RA 30 x 250 1 1 1 2 3 4 POWER RATING TEMPERATURE RISE RATED POWER IN % 100 75 50 25 0 0 50 100 150 200 250 300 400 RA 13 x7 0 RA 16 x9 RA 4 20 x1 RA 17 25 x1 38 RA 25 x1 68 RA 30 x2 50 HOT SPOT TEMPERATURE IN °C 125 300 200 100 0 350 10 100 1000 RATED POWER IN W AMBIENT TEMPERATURE IN °C MARKING Vishay Sfernice trademark, model, style, NF style (if applicable) ohmic value (in ), tolerance (in %), manufacturing date. ORDERING INFORMATION RA MODEL 13 x 70 STYLE AN 470U SPECIAL DESIGN CONNECTIONS OHMIC VALUE ± 10 % 1 C. SUP. TOLERANCE ADDITIONAL SLIDING COLLAR In option Custom items are subject to extra-charge and min. order. Please see price list. BO10^FIO e PACKAGING LEAD (Pb)-FREE GLOBAL PART NUMBER INFORMATION R A GLOBAL MODEL RA Revision: 16-Mar-16 3 0 2 5 0 A 6 8 0 R 0 K B 0 3 SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING SPECIAL 13 x 70 16 x 94 20 x 117 25 x 138 25 x 168 30 x 250 A = AN B=B C = CS D = CR The first four digits are significant figures and the last digit specifies the number of zeros to follow. R designates decimal point. 680R0 = 630 20301 = 20.3 k 88R88 = 88.88 K = 10 % Box: BO10 BO10NA BO20 BO30 BO30NA BO40 BO40NA As applicable. Example: BA7 Document Number: 50019 3 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 RA www.vishay.com Vishay Sfernice RELATED DOCUMENTS APPLICATION NOTES Packaging Information www.vishay.com/doc?50033 Accessories (Fixing) www.vishay.com/doc?50021 Accessories (Mounting) www.vishay.com/doc?50023 Revision: 16-Mar-16 Document Number: 50019 4 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. 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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