Three-Phase AC340~550 wide renge input High efficiency 89% and low dissipation Protection: Short circuit/Overload/Over voltage/Over temperature Cooling by free air convection Built-in constant current limiting circuit Can be installed on DIn rail TS-35/7.5 or15 UL 508 EN61000-6-2 (N50082-2) industrial immunity level 100% full load burn-in test Fixed switching frequency at 70KHz