output power output voltage v1 output current v1 standby supply v2 model number nominal peak(1) nominal peak(1) 250 w 300 w 12.0 v 20.8 a 25.00 a 5.0 v/0.5 a ccb250ps12 250 w 300 w 15.0 v 16.7 a 20.00 a 5.0 v/0.5 a ccb250ps15 250 w 300 w 24.0 v 10.4 a 12.50 a 5.0 v/0.5 a ccb250ps24 250 w 300 w 28.0 v 8.9 a 10.70 a 5.0 v/0.5 a ccb250ps28 250 w 300 w 36.0 v 6.9 a 8.30 a 5.0 v/0.5 a ccb250ps36 250 w 300 w 48.0 v 5.2 a 6.25 a 5.0 v/0.5 a ccb250ps48 input voltage ? 80-275 vac (see derating curve) input frequency ? 47-63 hz input current ? 2.4 a typical at 115 vac, full load 1.2 a typical at 230 vac, full load inrush current ? 30 a max at 230 vac, cold start at 25 °c power factor ? >0.9 earth leakage current ? 250 μa max at 264 vac/60 hz, typically 60/110 μa, 115/230 vac patient leakage current ? 100 μa max, 264 vac 60 hz input protection ? internal t5.0 a/250 v fuse in line and neutral output output voltage ? 12-48 vdc (see tables) output voltage trim ? ±3% (see mechanical details) initial set accuracy ? ±0.5% v1, ±5% v2 minimum load ? no minimum load required start up delay ? 1 s typical start up rise time ? 0.5 s typical hold up time ? 16 ms min at 90 vac drift ? ±0.2% after 20 min warm up line regulation ? ±0.5% max load regulation ? ±1% v1, ±5% v2 over/undershoot ? 5% max transient response ? 4% max. deviation, recovery to within 1% in 500 μs for a 50-75-50% load change ripple & noise ? 1% pk-pk, 20 mhz bandwidth overvoltage protection ? 115-140% vnom, recycle input to reset (v1 only) overload protection ? 125-165% inom v1 only short circuit protection ? continuous trip and restart (hiccup mode) temperature ? 0.05%/°c coefficient remote on/off ? uncommitted isolated optocoupler diode, (inhibit/enable) powered diode inhibits v1 xp general efficiency ? up to 95% isolation ? 4000 vac input to output 2 x mopp, 1500 vac input to ground 1 x mopp, 1500 vac output to ground 1 x mopp switching frequency ? pfc 30-500 khz, boost 25.6 khz, main 51.2 khz signals ? power fail inhibit, 5 v standby mtbf ? 369 khrs to mil-hdbk-217f at 25 °c, gb environmental operating temperature ? -20 °c to +70 °c derate linearly from +50 °c at 2.5%/?c to 50% load at +70 °c. see derating curve & longform datasheet cooling ? convection cooled operating humidity ? 95% rh, non-condensing storage temperature ? -40 °c to +85 °c operating altitude ? 3000 m shock ? 30 g pk, half sine, 6 axes vibration ? 2 g rms, 5 hz to 500 khz, 3 axes emc & safety low voltage psu emc ? en61204-3, high severity level emissions ? en55011/22 level b conducted en55011/22 level a radiated harmonic currents ? en61000-3-2, class a voltage flicker ? en61000-3-3 radiated immunity ? en61000-4-3, level 3 perf criteria a eft/burst ? en61000-4-4, level 3 perf criteria a surge ? en61000-4-5, installation class 3 perf criteria a conducted immunity ? en61000-4-6, level 3 perf criteria a dips & interruptions ? en61000-4-11, 30% 10 ms, 60% 100 ms, 5000 ms, perf criteria a, b, b, en60601-1-2, 30% 500 ms, 60% 100 ms, 10 ms, 5000 ms, perf criteria a, a, a, b - 230 vac. consult longform datasheet for 115 v operation. safety approvals ? iec60950-1 cb report, ul60950-1, tuv en60950-1, iec60601-1 cb report, ul60601-1, tuv 60601-1, equipment protection ? en60601-1, ansi/aami es60601-1, class csa22.2 no.60601-1 per cul bf rated, including risk management, en60950, ul60950