This document describes the main features and benefits of the STTH312 Ultrafast Recovery Diode, including ultrafast, soft recovery, very low conduction and switching losses, high frequency and/or high pulsed current operation, high reverse voltage capability, and high junction temperature. The high quality design of this diode ensures low leakage current, reproducible characteristics, and ruggedness, making it ideal for heavy duty applications that require long term reliability. It is commonly used in industrial power supplies, motor control, and other mission-critical systems, as well as auxiliary functions such as snubber, bootstrap, and demagnetization applications.