3R-250 250watt mountable non-inductive, high frequency resistors ? ? 3R-250 ? non-inductive ? design ? these ? elements ? are ? ideally ? suites ? for ? high ? frequency ? and ? pulse ? load ? applications. ? by ? direct ? mounting ? on ? a ? heatsink ? signifcant ? cost ? advantages ? can ? be ? reailzed ? for ? power ? appliation ? from ? 100w ? to ? 600w. ?? 3R-250 ? can ? be ? supplied ? in ? a ? 2-terminal ??? main ? applications ? are ? variable ? speed ? drives, ? ship, ? train, ? rf ? termination, ? power ? supplies, ? control ? devices, ? telecom, ? robotics, ? motor ? controls ? dynamic ? braking, ? and ? other ? switching ? designs. motor controls, high energy, rf, high voltage, inverters, pulse & plasma, non-inductive powers 3R-250 non-inductive 250watt mountable, high frequency resistors s pecifications d erating curve rated power or voltage% 25 50 75 00 25 50 75 00 80 60 40 20 0 tap temperature (?c) resistance values : 1r0 to 2megohm others on rquest resistance tolerance : 10% std. ,1%,2%,5% available on request. temperature coefficient : 100ppm/c typ. (others upon request) maximum working voltage : 5,000v dc, higher voltage on request, not execeeding max. power single shot voltage : up to 12kv at std. wave (1.5/50 ? ) insulation resistance : 10g ? min. at 500v creeping distance : 42mm min. inductance : 50 nh capacity/ground : 110pf capacity/resistive : 40pf operation temperature : -55c to +155c max. torque for contacts : 2 n.m max. torque for mounting : 1.8 n.m power rating : 250w at 50c tap temperature higher power : 600watt at 5c tap temperature dielectric strength : up to 12 kv termination to contacts : m5 screws required thermal transfer compound of-heat conductivity : 1 w/c required flatness of heat sink : 0.05mm roughness of the heatsink surface : 6.4 ? . isolation voltage(terminal to heatsink) : 7k vrms cf.: the described specifcations & dimensions subject to change without notice. d iemension willow technologies ltd. shawlands court, newchapel road, lingfield, surrey, rh7 6bl, united kingdom. + 44 (0) 1342 835234 + 44 (0) 1342 834306 info@willow.co.uk http://www.willow.co.uk heat sink mountable with m4 screw rf terminal shunt inverter moter braking pulse & plasma
|
