Voltcraft sps series single output variable dc power voltcraft sps 9400 voltcrafts sps 1540 pfc dc bench power supply features primary switched mode technology giving it conveniently compact dimensions at 220 x 110 x 310 mm the psu has integrated power factor correction pfc which suppresses harmonic waves that arise from switched mode regulationoverload protection temperature regulated fan cooling voltcraft sps 1540 pfc 600w single output dc power supply