Hezhongsheng STW350-ABDD-ATX 350W ATX SM-Series Power Supply EP06-000384 The Hezhongsheng STW350-ABDD-ATX is a 350W industrial ATX power supply identified by SMT spare-part number EP06-000384. It is installed in the host computer section of compatible SM-series SMT placement equipment, where it converts incoming AC electricity into regulated DC power required by the industrial computer, motherboard, storage devices, cooling fan, interface boards, and related control