document number: 50008 revision 17-nov-05 www.vishay.com 38 rwm vishay sfernice for technical questions, contact sfer@vishay.com features high dissipation high reliability level ? fire proof ? great mechanical strength ? excellent endurance ? good environmental protection ? conformal vitreous enamel ? all welded construction low ohmic values the performance of this series of professional resistors fully meets the requirements of the following speci? cations: ? nf c 83-210-001 ? cecc 40201-001 ? bs - cecc 40201-002 dimensions in millimeters undergoes european quality insurance system (cecc) enamelled wirewound power resistors axial leads rb59 rb61 rb57 rb57 rb60 rb60 rb58 rb58 ? ? ? jb hb ? kb ? ? ? ? ? ? ? 2.6 w 4.5 w 6 w 6 w 7 w 7 w 9.5 w 9.5 w 21 w 21 w 25.8 w 3 w 5 w 7 w 7 w 8 w 8 w 11 w 11 w 25 w 25 w 30 w 5.5 w 7 w 10 w 10 w 10 w 12 w 14 w 20 w 25 w 25 w 30 w 120 v 300 v 350 v 350 v 500 v 500 v 650 v 650 v 800 v 800 v 800 v 4.8 k ? ? 18.8 k ? 17.5 k ? ? 31 k ? ? 38 k ? 25.6 k ? 25.6 k ? 21.3 k ? 12 1 22.1 1 24.7 1 18 1 24.7 1 33.7 1 33.7 1 45.8 2 45.8 2 63.8 1 63.8 1 5.5 1 5.5 1 7.4 1.5 6.5 1 7.4 1.5 7.4 1.5 7.4 1.5 9.4 1.5 9.4 1.5 9.4 1.5 9.4 1.5 1 2 3 2.2 3 4 4 8 8 14 14 0.1 ? 10 k ? 0.1 ? 16 k ? 0.1 ? 27 k ? 0.1 ? 39 k ? 0.1 ? 27 k ? 0.33 ? 36 k ? 0.33 ? 36 k ? 0.47 ? 62 k ? 0.47 ? 62 k ? 0.68 ? 100 k ? 0.68 ? 100 k ? 0.1 ? 10 k ? 0.1 ? 6.8 k ? 0.15 ? 10 k ? 0.15 ? 39 k ? ? 0.33 ? 15 k ? ? 0.47 ? 33 k ? ? ? ? rwm 4 x 10 rwm 4 x 22 rwm 5 x 26 rwm 6 x 22 rwm 8 x 26 rwm 6 x 34 rwm 8 x 34 rwm 8 x 45 rwm 10 x 45 rwm 10 x 64 rwm 10 x 65 vishay sfernice styles designations cecc 40201 -001 nfc 83-210 -001 bs cecc 40201 -002 power rating at + 70 c at + 25 c with surface temp. + 450 c ohmic range in relation to tolerance 5 % e24 series qualified ohmic range nf c 83-210 limiting element voltage critical resis- tance a? b weight in g dimensions in mm technical specifications as a result of more than 50 years of experience and continu- ous improvements the rwm series of resistors features proven reliability in ac or dc applications. the high quality of the rwm resides mainly in the use of a proprietary vishay sfernice enamel ? red at high temperature and free from any compound liable to corrode the resistive wire . 25 min. a 25 min. ? 0.8 0.1 ? b
www.vishay.com 39 rwm vishay sfernice document number: 50008 revision 17-nov-05 for technical questions, contact sfer@vishay.com performance tests short time overload temperature cycling humidity (steady state) terminal strength load life conditions requirements (2 % + 0.1 ?) (1 % + 0.05 ? ) (5 % + 0.1 ? ) (1 % + 0.05 ? ) (5 % + 0.1 ? ) (0.5% + 0.05 ? ) ( 0.5 % + 0.05 ? ) ( 0.5 % + 0.05 ? ) ( 0.1 % + 0.05 ? ) ( 1.5 % + 0.05 ? ) 10 pr during 10 s. 25 c ambient ? 55 c + 200 c 56 days 40 c ambient - r.h. 95 % tensile test: 20 n 2 successive bending 2 full rotations of 180 1000 h at pr 90/30 cycle 25 c ambient cecc 40201 typical drifts overload heavy overloads can be endured in the form of short pulses < 0.1 s. particular requirements should be submitted to vishay sfernice, specifying peak voltage, cycle and environmental conditions. recommendations for use since these components are high dissipation power resistors, customers are advised to use a high melting point solder. for low ohmic values, the measurement becomes critical and the connecting wires resistance is to be included. the value is measured at 5mm from the resistor body. group mounting in a still atmosphere, a distance between axes equal to ? ve times the resistor?s diameter is recommended. cabinet mounting unventilated box: dissipation should be reduced (see dimensional drawing). forced ventilation: if conditions are appropriate, dissipation may be doubled or even trebled. in any case: the surface temperature at the hottest point should not exceed 450 c. these aspects should be considered by the end user. enamelled wirewound power resistors axial leads electrical specifications tolerance standard 5 % on request 1 % to 10 % temperature coef? cient + 75 ppm/c typical dielectric withstanding voltage nf en 140000 500 vrms - 1 minute - 10 ma inductance non inductive (ayrton-perry)winding available
document number: 50008 revision 17-nov-05 www.vishay.com 40 rwm vishay sfernice for technical questions, contact sfer@vishay.com power rating chart typical temperature rise hot spot temperature in c 400 300 200 100 0 rated power in watts 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 4 x 22 5 x 26 - 6 x 22 6 x 34 8 x 34 8 x 45 10 x 6 4 8 x 26 10 x 45 10 x 65 4 x 10 enamelled wirewound power resistors axial leads % rated power ambient temperature in c 0 25 100 200 300 350 0 25 50 75 100 116 8 x 45 ni optional model rwm tolerance 5 % packaging special design xxx method n optional ohmic value style 1.6 k ? custom items are subject to extra charge and min. order. please see price list. ordering information marking sfernice trademark, model and style, cecc style, if applicable (except for the smallest model due to lack of space: (4 x 10 or rb 59), ohmic value, resistance tolerance, manufacturing date (year - month). optional non inductive winding
legal disclaimer notice vishay document number: 91000 www.vishay.com revision: 08-apr-05 1 notice specifications of the products displayed herein are subjec t to change without notice. vishay intertechnology, inc., or anyone on its behalf, assume s no responsibility or liability fo r any errors or inaccuracies. information contained herein is intended to provide a product description only. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in vishay's terms and conditions of sale for such products, vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and /or use of vishay products including liab ility or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyrigh t, or other intellectual property right. the products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify vishay for any damages resulting from such improper use or sale.
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