HWS300-1500 Series Power Supplies TDK-Lambda HWS300-1500 Series Power Supplies feature universal AC input with PFC and offer high efficiency. These power supplies are Semi F47 compliant (230VAC) and RoHS compliant. These TDK-Lambda high-quality industrial power supplies include medical certification (HWS/ME), peak power versions (HWS-P), as well as conformal coating with -40ºC startup (HWS/HD).