Powerpax sw4171 c 12v 2a desktop power supply powerpax uk sw4171 c p the powerpax sw4171 c is a 12v 2a desktop power supply with full international safety approvals it comes with a universal full range ac input of 100 to 240v ac input with a 3 pin c14 input connector the power supply is supplied with a 2 1 x 5 5 x 12mm straight polarity ve centre output connector p powerpax sw4171 c 12vdc 2a c14 to 2 1mm