Universal AC input /full range Protections: short circuit/ Overload .Over-voltage. Over temperature 100% full load burn-in test Cooling by free ais convections AC input voltage range :180 264VAC 250-370CDC AC inrush current : Cold start, 40A at 230VAC DC adjustment range: 24 48V for 24V model, 48 53V for 48V model Overload protection : 105% 150% constant current limiting Working temperature: 20degree 50 degree@ 100%, 70degree @ 60% load Withstand voltage: 1/P-O/P: 3KVAC, I/P -FG : 1.5KVAC, 1minutes Connection: 1/P: 3poles, O/P: 4 poles screw Din terminal Size:227 X125.2 X 100mm Din-rail type power supply/switch power supply/power supply/SMPS