document number: 50016 for technical questions, contact: sfer@vishay.com www.vishay.com revision: 12-may-09 109 rw vishay sfernice fixed wirewound high power vitreous resistors with terminal collars or bands features ? 10 w to 80 w at 25 c ? nf c 93-214 ? rb 13 x 70 rb 20 x 117 ? high power up to 80 w at 25 c ? high long term stability drift < 2.5 % after 5000 h ? great mechanical strength ? fire proof ? environmental performance ? thermal shock strength 0.5 % (100 % h at - 25 c) ? compliant to rohs directive 2002/95/ec the rw wirewound power resistors are extremely well suited to professional applications, where high power and excellent endurance are required. they meet all r equirements of nf c 93-214 sp ecifications and five sizes cover the power range from 10 w to 80 w. non inductive types are available, by using th e special rwni winding. for high er power or extremely severe conditions of use, see the rwst series. nf f 16101, 10/1988 and 16102, 04/1992: not applicable (our parts are made of metallic and refrac tory materials). nf c 93-214. performances according to nf c 93-214. dimensions in millimeters series connections a 2 ? b max. ? c min. d + 0.5 + 0 ef max.g h j k collar collar collar band rw 8 x 34 an - - - 34 11.5 4.1 - - - - 28 1.0 19.5 0.5 16 0.5 rw 10 x 50 an cr - b 50 13 5 8 11 0.5 21 14 0.5 31 1.0 22 0.5 18 0.5 rw 13 x 70 an cr cs b 70 16 5 10.5 14 0.5 24.5 16 0.5 34 1.0 24 0.5 20 0.5 rw 16 x 94 an - - b 94 19.5 9 12 17 0.5 28 18 0.5 38 1.0 25 0.5 21 0.5 rw 20 x 117 an - - b 117 23 9 14 21 0.7 33 21 0.7 42 1.5 28 0.7 24 0.7 n ? c p q r q ? b s 4.2 t welded stainless steel 304 l collars ?cr? welded stainless steel 304 l collars ?an? n ? c ? u ? b a l m k j h welded stainless steel 304 l band ?b? d f ? b a ? c e g 4.2 welded stainless steel 304l collars ?cs?
www.vishay.com for technical questions, contact: sfer@vishay.com document number: 50016 110 revision: 12-may-09 rw vishay sfernice fixed wirewound high po wer vitreous resistors with terminal co llars or bands mechanical specifications mechanical protection enamel resistive element ni-cr wire connections b band an - cr - cs collars average unit weight 10 g to 100 g environmental specifications temperature limits - 55 c + 450 c climatic category - 55 c/+ 200 c/56 days series connections l + 0.5 + 0 m 1.5 n 2 p 1 q 0.5 r 2 s 2 t ? u collar collar collar band rw 8 x 34 an - - - 5 1 27 - - - - - 3.2 rw 10 x 50 an cr - b 6.35 1.5 40 19.5 19..5 72 62 12 4.2 rw 13 x 70 an cr cs b 0.6 3.5 56 22.5 20.5 91 81 15 4.2 rw 16 x 94 an - - b 0.6 4 78 - - - - - 4.2 rw 20 x 117 an - - b 0.8 6 98 - - - - - 4.2 dimensions in millimeters electrical specifications resistance range 1 to 68 k (e12 peferred series value) resistance tolerances standard 5 % power rating 10 w to 80 w at 25 c temperature coefficient 75 ppm/c (typical) dielectric strength 1000 v rms (an collars) insulation resistance 100 m (500 v dc ) an collars shelf life 0.1 % year (typical) performance tests conditions requirements typical values and drifts short time overload 10 p r during 5 s voltage limited at < 5000 v current limited at 5 a 2 % or 0.05 0.5 % climatic sequence - 55 c + 200 c 5 cycles 3 % or 0.05 insulation resistance > 100 m 0.5 % humidity (steady state) 56 days 95 % relative humidity 2 % or 0.05 insulation resistance > 100 m 0.5 % thermal shock load at 100 % p r followed by cold temp. exposure at - 55 c 2 % or 0.05 0.5 % shock severity 50 9 shocks/each side 1 % or 0.05 0.25 % vibration severity 55b 1 % or 0.05 0.25 % terminal strength collar an traction 40 n band b torque 60 ncm 1 % or 0.05 0.5 % load life 90'/30' cycle 1000 h at p r 25 c 5 % 1000 h 1.5 % 5000 h 2.5 % special features rw style 8 x 34 10 x 50 13 x 70 16 x 94 20 x 117 designation nf c 93-214 - - rb 13 x 70 - rb 20 x 117 power rating at 25 c 10 w 17 w 28 w 44 w 72 w maximum power rating at 25 c 13 w 20 w 32 w 50 w 80 w ohmic range (e12, e24 series) 1 10 k 1 27 k 2.2 56 k 2.2 56 k 2.7 68 k limiting element voltage 300 v 450 v 650 v 900 v 1100 v critical resistance 6.9 k 10 k 13.2 k 16 k 15.1 k
document number: 50016 for technical questions, contact: sfer@vishay.com www.vishay.com revision: 12-may-09 111 rw fixed wirewound high powe r vitreous resistors with terminal collars or bands vishay sfernice non inductive winding for high frequencies, low self induction resistors are available with special windings. rwni designation. power rating temperature rise marking vishay sfernice trademark, model, style, nf style (if applicable) nominal resistance (in ), tolerance (in %), manufacturing date. model and style rwni 8 x 34 rwni 10 x 50 rwni 13 x 70 rwni 16 x 94 rwni 20 x 117 ohmic range 4.7 100 4.7 220 4.7 620 10 1.2 k 10 2.2 k ambient temperature in c 100 125 0 0 75 150 225 300 375 450 525 nf c 93-214 rated power in % vishay sfernice 75 50 25 rated power in w hot spot temperature in c 400 300 200 100 0 1000 rw 8 x 34 rw 10 x 50 rw 13 x 70 rw 16 x 94 rw 20 x 117 10 100 ordering information rw 20 117 ni an 68 5 % b020 e model style non-inductive winding optional special design optional connections ohmic value custom items are subject to extra-charge and min. order. please see price list. tolerance packaging lead (pb)-free global part number information global model size leads option ohmic value tolerance packaging special rw 8 x 34 10 x 50 13 x 70 16 x 94 20 x 117 a = an b = b c = cs d = cr n = non inductive winding the first two digits are significant figures and the last digit specifies the number of zeros to follow. r designates decimal point. 203 = 20 k 471 = 470 48r = 48.7 r01 = 0.01 j = 5.0 % box: ba25 ba25na bo20 bo20na bo30 bo30na bo40 bo40na bo50 bo50na as applicable. example: bc1 x9 a 2 3 b 0 w 1 r 6 4 0j0
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