Tdk lambda gws 250500w enclosed power supplies 12 48v dc 105a tdk lambda gws 500 12 the tdk lambda gws 500 12 500w enclosed power supply 12v dc 42a is an innovative integrated power supply with excellent efficiency and low no load loss for all fields of application for erp directive this well designed unit provides 250w of power with convection complying with en61000 3 2 class c enabling use in lighting systems additionally equipped with fully regulated output voltage and short circuit