... overload/short circuit, convection cooling 3. UL 300w 24v dc power supply led transformer with CE Rohs UL ETS EMC1. Specification of UN300W ... -4-2,3,4,5,6,8,11Cooling method convectionUniversal AC input/full rangeProtection: overload/ over voltage/ short circuitapprovals: UL, ... Input voltage: Normally, power supplies with AC input can also be applied to DC input. The DC input voltage range shall be 120 ...