rcec 400 www.vishay.com vishay mcb revision: 18-sep-14 1 document number: 32507 for technical questions, contact: mcbfixedresistors@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 resistors cooled by auxiliary heatsink (not supplied) thick film technology features ? system without external radiation ? high power / volume ratio ?non-inductive ? screw-on outputs ? possible configuration with 2 or 3 resistors note (1) on request. standard electrical specifications model value resistance range ? max. rated power p 75 c w tolerance % temperature coefficient ppm/c e-series ohmic values rcec 400 single 1.0 to 1m 400 10, 5 (1) 150 (typical) e 12 double 1.5 to 1m 2 x 180 10, 5 (1) 150 (typical) e 12 mechanical specifications ul 94 flame classifications material in accordance with ul 94 v-0 resistive element thick film substrate alumina encapsulation resin filled in housing technical specifications parameter single value double value operating temperature range -55 c to +150 c maximum operating voltage 4000 v dielectric strength v rms (50 hz / 1 min) 6000 v creepage distance > 42 mm clearance distance > 12 mm > 10 mm cti index > 600 partial discharge < 20 pc at 5000 v eff inductance < 40 nh insulation resistance 10 5 m ? at 500 v dc weight (max.) 75 g
rcec 400 www.vishay.com vishay mcb revision: 18-sep-14 2 document number: 32507 for technical questions, contact: mcbfixedresistors@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 note (1) the higher of either value energy absorption single value repetitive operation: 2 j/t = 50 s ? other t values: consult us double value repetitive operation: 2 j/t = 50 s ? other t values: consult us dimensions in millimeters performances tests conditions requirements typical values momentary overload single value 800 w / 10 s 2 % 0.2 % double value 2 x 360 w / 10 s humidity (steady state) 56 da ys, 40 c, 95 % hr 2 % or 0.05 ? (1) 0.2 % vrt -55 c to +125 c 5 cycles 2 % or 0.05 ? (1) 0.2 % mechanical shock iec 60115-4 clause 2-3-6 0.5 % or 0.05 ? (1) 0.25 % vibration iec 60115-4 clause 2-3-2 0.5 % or 0.05 ? (1) 0.25 % terminals strength 130 nc m / 100 n 1 % or 0.05 ? (1) 0.1 % endurance 2000 cycles p n 30 min / 30 min 5 % 0.2 % ? 4.2 0.1 23 57 66 19.7 40 21
rcec 400 www.vishay.com vishay mcb revision: 18-sep-14 3 document number: 32507 for technical questions, contact: mcbfixedresistors@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 dissipation temperature rise as a function of the power applied overall thermal resi stance 0.1875 c/w (double value: 0.2083 c/w) permanent applicable power as a function of heatsink temperature overload intermittent overload (exceptional operation) assembly maximum tightening torque: ? 150 ncm, mechanical mounting ? 130 ncm, electrical mounting 10 100 1000 10000 0 10 20 30 40 50 60 70 80 0 102030405060708090100 axi s title 1 s t line 2nd line 1 s t line ? ( c) k (%) s ingle value: p = k x 150 double value: p = k x 400 ? = f (p) 10 100 1000 10000 0 25 50 75 100 050100150 axi s title 1 s t line 2nd line axi s title k (%) ( c) s ingle value: p = k x 400 double value: p = k x 180 10 100 1000 10000 0 1 2 3 4 1101001000 axi s title 1 s t line 2nd line 1 s t line k.p t ( s ) 57 0.2 m4 min. depth 5 thermal compound re s i s tance 0.05 c/w / 0.025 mm
rcec 400 www.vishay.com vishay mcb revision: 18-sep-14 4 document number: 32507 for technical questions, contact: mcbfixedresistors@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 cooling the temperature of the heatsink may be maintained at the specified values with: ? forced air ventilation ? internal circulation of a cooling liquid ? heatsink contact surface: ra 6.3 m ? evenness defect: 0.05 mm max. ? surface temperature gradient (isotherm): 20 c max. ? thermal compound not supplied (resistance ? 0.05 c/w / 0.025 mm) the user must select the thermal resistance of the heatsink according to the power applied. ordering information rcec 400 10 ? 10 % model type resistance value (double value: 2 x 10 ? for example) tolerance ( 5 % or 10 %)
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