The SMBJ58A-TR Transient Voltage Suppressor (TVS) diode with Unidirect from STMicroelectronics is a 600W, 58V TVS diode in the SMAJ series. It is used to protect vulnerable electronic components from high voltage transients due to lightning strikes, electrical surges, and overvoltage spikes. This diode has a low forward voltage drop and fast response time, which helps to quickly divert any damaging voltage away from your circuit. It also has an insulation capability of up to 1.5kV and a peak pulse power of 600W. This TVS diode is ideal for use in industrial, consumer, and automotive applications.