The TP2000 series are bench type Linear DC Power Supply, using toroidal transformer. The adjustable linear DC power supply works in constant voltage and constant current mode. The output ripple is very low, 1mVrms and 3mArms. The DC lab linear regulated power supply give low ripple output, 1mVrms and 3mArms. 1) Dual channel variable voltage power supply 30V 3A or 30V 5A 2) One fixed DC output 5V 3A power supply The laboratory linear DC triple power supply can be used as student power supply, laboratory power supply and electronic power supply in factory.