www.vishay.com 108 sks vishay draloric document number 20138 revision 31-may-01 for technical questions, contact ff1aresistors@vishay.com carbon film resistors, fusible type features fusible resistor for constant voltage designed for over load protection special construction opens the resistor at a specified overload non inflammable coating defined switch-off behaviour ?r i 6 ? for r n < 10r ? coating: red brown ? marking: 5 th band yellow r i 1 ? for r n 10r parameter unit SKS2 sks3 sks4 sks5 sks8 rated dissipation at 70 c w 0.30 0.35 0.50 1.0 1.3 overload to fuse w 3.5 5.0 7.0 14.0 21.0 time to fuse (max) sec. 40 40 70 80 100 max. permissible voltage v see diagram voltage coefficient 1 / v < 10 -7 < 10 -7 < 10 -7 < 10 -7 < 10 -7 current noise v / v < 0.1 < 0.1 < 0.1 < 0.1 < 0.1 thermal resistance (max) k/w 220 180 130 80 60 thermal time constant sec. 8 11 20 35 70 category temperature range c - 55 / +125 failure rate 10 -9 /h < 30 weight g 0.2 0.36 0.7 1.5 3.3 technical specifications model size power rating tolerance resistance p 70?c range w% ? SKS2 0207 0.30 5, 10 1r0 - 5k1 sks3 0309 0.35 5, 10 1r0 - 5k1 sks4 0414 0.50 5, 10 1r0 - 5k1 sks5 0617 1.0 5, 10 1r0 - 5k1 sks8 0922 1.3 5, 10 1r0 - 5k1 standard electrical specifications ordering information SKS2 100r 5% a5 model resistance value ? tolerance packaging
www.vishay.com 109 sks vishay draloric document number 20138 revision 31-may-01 for technical questions, contact ff1aresistors@vishay.com dimensions derating % rated power - 55 - 25 0 25 50 75 100 125 150 175 200 ambient temperature in ?c 120 100 80 60 40 20 0 70 ? taping in acc. with iec60286-1 ? d and l measured in acc. with iec60294 ? d according to iec60301 1) also available in 26mm tape spacing * 9mm for sks5, sks8 carbon film resistors, fusible type model dimensions in millimeters d l l1max b d e SKS2 2.5 - 0.5 6.0 - 0.5 7.5 53 1 1) 0.6 7.5 sks3 3.2 - 0.5 8.5 - 1.0 10.0 53 1 0.6 10 sks4 4.1 - 0.5 12.0 - 1.5 15.0 73 1 0.8 15 sks5 6.0 - 0.5 16.5 - 1.5 17.5 77 1 0.8 17.5 sks8 9.0 - 0.5 20.0 - 1.5 22.5 77 1 0.8 22.5 e d l l 1 6 mm* d b 100 5 10 15 20 25 30 35 40 45 50 55 60 70 50 30 20 10 7 5 3 2 1 0.7 0.5 7 14 19 21 56 fusing time t (s) opening power p [w] calculated with rated resistance 100 0 1,8 3,5 5 6,5 10 14 15 17 20 70 50 30 20 10 7 5 3 2 1 0.7 0.5 opening power p [w] calculated with rated resistance fusing time t (s) fusing time (at u = constant) SKS2 sks3 sks4 sks5 sks8
www.vishay.com 110 sks vishay draloric document number 20138 revision 31-may-01 for technical questions, contact ff1aresistors@vishay.com power rating p [w] power rating p [w] power rating p [w] 100 10 1 0.1 secondary conditions: a) p 40?c b) ? u 40 c c) ?ax see diagram above 50 5 0.5 10 ? 10 ? 10 ? 10 ? 10 0 10 100 10 1 0.1 10 ? 10 ? 10 ? 10 ? 10 0 10 50 5 0.5 secondary conditions: a) p 40?c b) ? u 40 c c) ?ax see diagram above 100 10 1 0.1 50 5 0.5 10 ? 10 ? 10 ? 10 ? 10 0 10 secondary conditions: a) p 0 (single pulse) b) ? u 40 c c) ?ax see diagram above 1000 1 10 100 1k 10k 700 500 300 200 100 70 50 30 20 10 secondary conditions: impulse load a) p max. see pulse load diagrams below b) ? u 40 c voltage u [v] sks8 sks5 sks4 sks3 SKS2 resistance values ? approximate values for ?max in case of failure and max pulse voltage sks5 / 8 sks4 SKS2 sks3 sks3 sks5 / 8 sks4 SKS2 sks3 rectangle t i (s) rectangle t i (s) sks5 / 8 sks4 SKS2 rectangle t i (s) pulse load p 0 r 10 ? pulse load p 0 r <10 ? pulse load p p40 r <10 ? pulse load p p40 r 10 ? power rating p [w] 100 10 1 0.1 50 5 0.5 10 ? 10 ? 10 ? 10 ? 10 0 10 secondary conditions: a) p 0 (single pulse) b) ? u 40 c c) ?ax see diagram rectangle t i (s) SKS2 sks3 sks4 sks5 / 8 carbon film resistors, fusible type
www.vishay.com 111 sks vishay draloric document number 20138 revision 31-may-01 for technical questions, contact ff1aresistors@vishay.com carbon film resistors, fusible type performance test conditions results voltage coefficient 1 / v < 10 -7 ohmic value after fusing ? > 10 x r n temperature coefficient 10 -6 /k r < 10 ? : + 200; r 10 ? :- 300.. - 500 non-linearity db sks1 = 90; SKS2 to 8 =100 damp heat steady state 56 days, 40 c, 90-95% humidity 1%
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