Powerpax uk desktop power supply units 12 24v dc powerpax uk sw4604b p this 12v dc desktop power supply unit from powerpax is a quality energy efficient psu fitted with a standard 3 pin iec c14 input connector manufactured to a high standard with a fanless convection cooled design and highly reliable the unit has a host of excellent features including a mtbf of over 30 000 hours plus 4 types of built in protection over voltage short circuit over current and over temperature p