Switchmode power supplies offer several significant advantages over traditional linear transformer power supplies.They are far more efficient than their linear counterparts. As they do not use power or mains transformers the equivalent power supply weighs considerably less than traditional types. Physical size is also reduced. Though the power supplies are supplied in a vented steel cabinet they must be installed within a secondary earthed cabinet as the 240V input terminals are exposed. Features Universal AC input / Full range Protections: Short circuit / Overload / Over voltage Cooling by free air convection LED indicator for power on 100% full load burn-in test All using 105ºC long life electrolytic capacitors Withstand 300VAC surge input for 5 second High operating temperature up to 70ºC Withstand 5G vibration test High efficiency, long life and high reliability