rso www.vishay.com vishay sfernice revision: 27-may-13 1 document number: 50018 for technical questions, contact: sfer@vishay.com 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 fixed wirewound enamelled corrugated tape resistors very high dissipation features ? 160 w to 1 kw at 25 c ? material categorization: ? for definitions of co mpliance please see www.vishay.com/doc?99912 the remarkable dissipati on power of this series is the re sult of an original winding method using corrugated edge-wound tape, thus forming a very active radiator. the enamelling follows the contour of the resist ive element and provides effective insulat ion and support for the winding. ? the tubular core is of special ceramic, capable of withstanding hi gh thermal shock and over load of short duration. nf f 16101, 10/1988 and 16102, 04/1992: not applicable (o ur parts are made of metallic and refractory materials). dimensions in millimeters a z f p ? b ? q r ? c ? c d e screwed stainless steel 304 l ?an? type 1 a 26 ? b j k ? c m g h 15 l screwed stainless steel 304 l ?cs? type 1 a 23 3 ? b 58 ? c j k m g h 15 l screwed stainless steel 304 l ?cs? type 2
rso www.vishay.com vishay sfernice revision: 27-may-13 2 document number: 50018 for technical questions, contact: sfer@vishay.com 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 recommendations for use overload: ? the rso resistors are capable of wi thstanding overloads of about 10 p r for a maximum period of 5 s; they can resist momentarily even greater overloads. particular requirements should be submitted to vishay sfernice. dimensions in millimeters rso ? series connections a 2 ? b max. ? c min. d max. e f + 0.5 + 0 g - 4/+ 0 h - 4/+ 0 j 25 x 138 an type 1 cs type 1 138 39 12.6 54 33.5 1 9 199 169 50 1.5 25 x 168 an type 1 cs type 1 168 39 12.6 54 33.5 1 9 229 199 50 1.5 30 x 250 an type 1 cs type 1 250 44 17.4 62 36 1 13 317 287 60 1.5 40 x 370 an type 2 cs type 2 370 54.5 22.3 85.5 57 1.5 18 432 405 73.8 50 x 373 an type 2 cs type 2 373 65 27.1 97 63 1.5 18 432 405 79 rso ? series connections k l + 0.5 m 0.5 p q r z average unit weight in g an cs 25 x 138 an type 1 cs type 1 27 1 6.5 24 117 2 5.7 28.5 1 6 160 205 25 x 168 an type 1 cs type 1 27 1 6.5 24 147 2 5.7 28.5 1 6 190 235 30 x 250 an type 1 cs type 1 30 1 9 25 227 2.5 5.7 31 1 5 350 400 40 x 370 an type 2 cs type 2 45 1.5 9 30 332 3 9.2 45 1.5 10 960 1040 50 x 373 an type 2 cs type 2 45 1.5 9 30 332 3 9.2 51 1.5 11.5 1375 1455 standard electrical specifications model size resistance range ? rated power p 25 c w tolerance % rso 25 x 138 25138 0.068 to 12 160 10 rso 25 x 168 25168 0.10 to 18 200 10 rso 30 x 250 30250 0.22 to 33 350 10 rso 40 x 370 40370 0.33 to 56 700 10 rso 50 x 373 50373 0.39 to 68 1000 10 mechanical specifications mechanical protection enamel resistive element ni-cr wire connections an cs supporting collars average unit weight 160 g to 1455 g environmental specifications temperature range - 55 c + 450 c climatic category - 55 c/+ 200 c/56 days technical specifications resistance range 0.068 ? to 68 ? (e12 preferred series) standard resistance tolerance r n ? 1 ? 5 % r n < 1 ? 10 % power rating 160 w to 1 kw at 25 c performance tests conditions requirements typical values and drifts short time overload 10 p r during 5 s 2 % or 0.05 ? 1 % thermal shock load at p r followed by cold temp. exposure at - 55 c/15 s 2 % or 0.05 ? 1 % climatic sequence phase a: + 200 phase c: - 55 phase d: 5 cycles 3 % or 0.05 ? 1 % load life 90/30' cycle 1000 h at p r 25 c 5 % 2 %
rso www.vishay.com vishay sfernice revision: 27-may-13 3 document number: 50018 for technical questions, contact: sfer@vishay.com 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 power rating temperature rise marking vishay sfernice trademark, model, style, nominal resistance (in ? ), tolerance (in %), manufacturing date. ambient temperature in c 100 125 75 50 25 0 0 100 200 300 400 450 rated power in % rated power in w 450 400 300 200 100 0 10 100 1000 hot spot temperature in c rso 25 x 138 rso 30 x 250 rso 25 x 168 rso 40 x 370 rso 50 x 373 packaging box: fixed quantity depe nding on size and collars ordering information rso 25 x 168 xxx cs u82 10 % b02na e model style special design method n optional connections ohmic value custom items are subject to extra-charge and min. order. please see price list. tolerance packaging lead (pb)-free sap part numbering guidelines rso 25168 c r820 k n model style connections ohmic value tolerance packaging
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