Tdk lambda 200 432w single output variable dc power supplies switched mode bench tdk lambda z60 7 the tdk lambda z60 7 420w single output variable dc power supply switched mode bench is a z device that impresses with rich features in a compact design which sets new standards with a size of just 70 x 83mm w x h the power supply provides two large displays and separate encoders for voltage and current along with extensive features on the rear side there is an integrated rs232rs485 in