Features: Universal AC input / Full range Built-in active PFC and over temp. protection (MDR-100) Class I, Div 2 Hazardous Locations T4(MDR-40/60) Protections: Short circuit / Overload / Over voltage Built-in constant current limiting circuit (MDR-20~100) Cooling by free air convection Working temperature: -20~+70C by models Can be installed on DIN rail TS-35 / 7.5 or 15 No load power consumption <0.75W (<1W for MDR-100) DC OK signal output (MDR-10/20); DC OK relay contact (MDR-40/60/100) DC output voltage adjustable (MDR-20~100) LED indicator for power on