document number: 50008 revision 19-mar-02 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 25 min. a 25 min. ? 0.8 0.1 ? b undergoes european quality insurance system (cecc) enamelled wirewound power resistors axial leads rb59 rb61 rb57 rb57 rb60 rb60 rb58 rb58 ? ? ? jb hb ? kb ? ? ? ? ? ? ? rw69 ? rw67 ? ? ? ? rw68 ? ? ? 2.6w 4.5w 6w 6w 7w 7w 9.5w 9.5w 21w 21w 25.8w 3w 5w 7w 7w 8w 8w 11w 11w 25w 25w 30w 5.5w 7w 10w 10w 10w 12w 14w 20w 25w 25w 30w 120v 300v 350v 350v 500v 500v 650v 650v 800v 800v 800v 4.8k ? ? 18.8k ? 17.5k ? ? 31k ? ? 38k ? 25.6k ? 25.6k ? 21.3k ? 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 ? 10k ? 0.1 ? 16k ? 0.1 ? 27k ? 0.1 ? 39k ? 0.1 ? 27k ? 0.33 ? 36k ? 0.33 ? 36k ? 0.47 ? 62k ? 0.47 ? 62k ? 0.68 ? 100k ? 0.68 ? 100k ? 0.1 ? 10k ? 0.1 ? 6.8k ? 0.15 ? 10k ? 0.15 ? 39k ? ? 0.33 ? 15k ? ? 0.47 ? 33k ? ? ? ? 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 confor- mity mil- r-26 power rating at + 70c at + 2 5 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 .
www.vishay.com 39 RWM vishay sfernice document number: 50008 revision 19-mar-02 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 ? 10pr during 10s. 25 c ambient ? 55 c + 200 c 56 days 40 c ambient - r.h. 95% tensile test: 20n 2 successive bending 2 full rotations of 180 1000h at pr 90 ? /30 ? cycle 25 c ambient cecc 40201 typical drifts overload heavy overloads can be endured in the form of short pulses < 0.1s. 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 + 75ppm/ c typical dielectric withstanding voltage 1000vrms inductance non inductive (ayrton-perry)winding available
document number: 50008 revision 19-mar-02 www.vishay.com 40 RWM vishay sfernice for technical questions, contact sfer@vishay.com power rating chart typical temperature rise 8 x 45 non inductive winding ni model RWM tolerance 5% packaging optional special design xxx method n optional ohmic value style 1.6k ? 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). 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 4x22 5x26 - 6x22 6x34 8x3 4 8x45 10 x 64 8x26 10 x 45 10 x 65 4x10 enamelled wirewound power resistors axial leads % rated power ambient temperature in c 0 25 100 200 300 350 0 25 50 75 100 116
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