The RPS-400-12-TF is a switching power supply manufactured by Mean Well. It has a power rating of 399.6W, a voltage of 12V and a maximum current of 33.3A. It is designed for enclosed top fan applications and has an efficiency of up to 85%. It features overload protection, short circuit protection, over temperature protection and forced air cooling, all designed to ensure its safe and efficient operation. It also features a power switch and LED indicator, and is RoHS compliant.