The WS3A015120D is a Schottky Barrier Diode (SBD) manufactured by the China Electronics Technology Corporation (CETC). This diode comes in a TO-247-2 RoHS package, with a nominal breakdown voltage of 15V and surge current capability of up to 120A. This diode is designed for high frequency applications and operates at high temperature and high voltage. It is suitable for a variety of automotive, industrial, and communication applications, and also offers low power loss, high efficiency, and low leakage current performance. The diode has a high forward voltage drop and fast response due to its optimized construction.