The BTZ52C43 is a Zener diode from High Diode that is RoHS compliant and packaged in a SOD-123. It has a voltage rating of 43V and can withstand a power dissipation of 500mW. It is designed to regulate voltages, prevent surges, maintain steady current, and provide protection from reverse voltages. The device features a low leakage current, fast switching, and low maximum voltage regulation. It is suitable for use in a variety of applications, including DC voltage stabilization, reverse polarity protection, and high/low voltage suppression.