rssd www.vishay.com vishay sfernice revision: 24-may-13 1 document number: 50020 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 adjustable wirewound vitreous resistors low ohmic values (0.10 ? available) features ? high power rating: 16 w to 600 w at 25 c ? heavy overloads 10 p n 15 s ? 1 % ? low ohmic values 0.10 ?? available ? high long term stability drift < 1.5 % after 1000 h ? excellent withstanding of thermal shock ? mechanical strength ? fire proof ? material categorization: for definitions of compliance please see www.vishay.com/doc?99912 rssd medium and high power re sistors are noted for their ability to withstand heavy transient and seve re shock and vibration conditions. they complement the ohmic range of vishay styles rw, rwst and ra in the low value area, and can be tapped by means of adjustable collars. standard rssd resistors have a single adjustable collar. nf f 16101, 10/1988 and 16102, 04/1992: not applicable (o ur parts are made of metallic and refractory materials). note (1) cs connections on request dimensions in millimeters rssd ? series connection a 2 ? b max. ? c min. de f + 0.5 + 0 p? qr z approx. average unit weight in g 8 x 34 an type1 34 10 4.1 27 2 20 0.5 5 28 1 3.2 16 0.5 1 10 10 x 50 an type1 50 11.5 5 40 2 22 0.5 6.35 31 1 4.2 18 0.5 1.5 22 13 x 70 an type1 cs (1) 70 14.5 6.7 56 2 24 0.5 6.35 34 1 4.2 20 0.5 3.5 38 16 x 94 an type1 94 18 9.2 78 2 26.5 0.5 6.35 38 1 4.2 21 0.5 4 55 20 x 117 an type1 117 22 12.6 98 2 31 0.7 6.35 42 1 4.2 24 0.7 5 80 welded stainless steel 304 l collars ?an? type 1 type 2 screwed type 1 solded screwed stainless steel 304 l collars ?cs? type 1 screwed stainless steel 304 l collars ?cs? type 2 a z ? b d ? q r ? c ? c p e p a ? b 26 ? c j k m g h l a ? b 23 58 j k ? c m g h 15 15 l f f
rssd www.vishay.com vishay sfernice revision: 24-may-13 2 document number: 50020 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 dimensions in millimeters rssd ? series connections a 2 ? b max. ? c min. d e f + 0.5 + 0 g - 4 - 0 h - 4 - 0 j 25 x 138 an type1 cs type1 138 27 16.4 117 2 33.5 1 9 199 169 50 1.5 25 x 168 an type1 cs type1 168 27 16.4 147 2 33.5 1 9 229 199 50 1.5 30 x 250 an type1 cs type1 250 32 21.3 227 2.5 36 1 13 317 287 60 1.5 40 x 370 an type2 cs type2 370 43 22.3 332 3 57 1.5 18 432 405 69 max. 50 x 373 an type2 cs type2 373 53 27.1 332 3 63 1.5 18 432 405 80 max. rssd ? series connections k l 0.5 m 0.5 p ? q r z approx. average unit weight in g an cs 25 x 138 an type1 cs type1 27 1 6.5 24 51 1.5 5.7 28.5 1 6 90 135 25 x 168 an type1 cs type1 27 1 6.5 24 51 1.5 5.7 28.5 1 6 115 160 30 x 250 an type1 cs type1 30 1 9 25 55 1.5 5.7 31 1 5 240 290 40 x 370 an type2 cs type2 45 1 9 30 81.5 max. 9.2 45 1.5 10 845 925 50 x 373 an type2 cs type2 51 1.5 9 30 92.5 max. 9.2 51 1.5 11.5 1270 1350 standard electrical specifications model size resistance range ? rated power p 25 c w tolerance % rssd 8 x 34 0834 0.12 to 10 16 5, 10 , 20 rssd 10 x 50 1050 0.12 to 22 25 5, 10 , 20 rssd 13 x 70 1370 0.12 to 43 42 5, 10 , 20 rssd 16 x 94 1694 0.33 to 75 70 5, 10 , 20 rssd 20 x 117 20117 0.22 to 100 100 5, 10 , 20 rssd 25 x 138 25138 0.10 to 150 140 5, 10 , 20 rssd 25 x 168 25168 0.12 to 220 200 5, 10 , 20 rssd 30 x 250 30250 0.22 to 360 280 5, 10 , 20 rssd 40 x 370 40370 0.47 to 470 450 5, 10 , 20 rssd 50 x 373 50373 0.68 to 560 600 5, 10 , 20 mechanical specifications mechanical protection vishay sfernice special cement resistive element nickel alloy wire connections an collars cs supporting collars average unit weight 10 g to 1350 g environmental specifications temperature range - 55 c + 450 c climatic category - 55 c/+ 200 c/56 days technical specifications resistance range 0.12 ? to 560 ? (e12 series) standard resistance r ? 10 ? 5 % tolerance 1 ??? r ? 10 ? 10 % 0.1 ??? r < 1 ? 20 % power rating 14 w to 600 w at 25 c performance tests conditions requirements typical values and drifts short time overload 10 p r during 5 s 2 % 1 % climatic sequence - 55 c + 200 c 5 cycles 3 % 1 % thermal shock load at 100 % p r followed by cold - 55 c/15 2 % or 0.05 ? 1 % load life 90/30 cycle 1000 h at p r at + 25 c 5 % 1.5 %
rssd www.vishay.com vishay sfernice revision: 24-may-13 3 document number: 50020 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 additional tappings are supplied with their adjustable collars fastened but not set to any specific value. please no te that, on request, all tappin gs can be adjusted by vishay sfernice. for adjustment purposes we would need to be advised of the ohmic values, and tolerances of the sections in successive order in addition to their sum r n . the permissible maximum value for an adjustment should take into account the possible negative tolerance of r n . please consult vishay sfernice regarding the acceptable tolerance. recommendations for use maximum current strength: ? the ohmic value and the power decrease as the connections are brought together. to avoid overload, the maximum current strength that is permissible for r n should never be exceeded: i max. = power rating temperature rise marking vishay sfernice trademark, model, style, nominal resistance (in ? ), tolerance (in %), manufacturing date. special features rssd type 8 x 34 10 x 50 13 x 70 16 x 94 20 x 117 25 x 138 25 x 168 30 x 250 40 x 370 50 x 373 power rating ? at 25 c continuous 16 w 25 w 42 w 70 w 100 w 140 w 200 w 280 w 450 w 600 w reduced 14 w 22 w 38 w 62 w 90 w 125 w 170 w 240 w 360 w 450 w resistance ohmic range ? (e12, e24 series) ? with 1 tapping 0.12 ? 10 ? 0.12 ? 22 ? 0.12 ? 43 ? 0.33 ? 75 ? 0.22 ? 100 ? 0.10 ? 150 ? 0.12 ? 220 ? 0.22 ? 360 ? 0.47 ? 470 ? 0.68 ? 560 ? maximum number ? of additional tapping 0 1 1 1 1 1 2 2 4 4 reduction % of ohmic ? value by tapping 23 21 14 11 10 8 6.5 6 5.7 5.7 p r r n ? ambient temperature in c rated power in % 100 80 60 40 0 0 100 200 300 400 450 120 rated power in w 400 300 200 100 0 10 100 1000 r s s d 8 x 3 4 r s s d 1 0 x 5 0 x 3 1 d s s r0 7 r s s d 1 6 x 9 4 r s sd 2 0 x 1 1 7 r s s d 2 5 x 13 8 r ss d 2 5 x 1 6 8 r s s d 3 0 x 2 5 0 r s s d 4 0 x 3 7 0 r s s d 5 0x 3 7 3 hot spot temperature in c ordering information rssd 10 50 an 10u 5 % ba25 e model style special design method n o optional connections ohmic value custom items are subject to extra-charge and min. order. please see price list. tolerance packaging lead (pb)-free
rssd www.vishay.com vishay sfernice revision: 24-may-13 4 document number: 50020 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 global part number information global model size leads ohmic value tolerance packaging special rssd 08 x 34 10 x 50 13 x 70 16 x 94 20 x 117 25 x 138 25 x 168 30 x 250 40 x 370 50 x 373 a = an b = b c = cs f = faston the three first digits are significant figures and the last digit specifies the number of zeros to follow. r designates decimal point. 4700 = 470 ? 48r5 = 48.5 ? r010 = 0.01 ? ... j = 5 % k = 10 % m = 20 % standard packaging: bxx = box, xxpcs (fixed qty depending on size) no standard packaging: b00 = box, qty open as applicable. example: cb4 d2181rj r s s 53a50b 1 5
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