This document describes the features and benefits of the STTH30R04 ultrafast recovery diode, which was released in March 2007. The diode features ultrafast switching, low reverse current, low thermal resistance, reduced switching and conduction losses, and high junction temperature. The high quality design of the diode ensures low leakage current, reproducible characteristics, and intrinsic ruggedness, making it ideal for heavy duty applications that require long term reliability.