The ELG-240-48DA from Mean Well is a 240 watt, open frame power supply with a 48 volt DC output. It features active power factor correction, built-in 4kV surge immunity, as well as protections against short circuit, over load, and over voltage. This power supply also has a wide operating temperature range of -20°C to +70°C and an MTBF of greater than 500,000 hours. It is cULus, cTUVus, CB, and TUV certified, and comes in the standard size of 4.72 inches by 2.76 inches by 1.37 inches.