The BZT52C3V3 with SOD-123 is a Zener diode manufactured by Leiditech. It is designed for use in a variety of small-signal circuits such as voltage regulation, voltage protection, and over-voltage protection. The diode is constructed with semiconductor materials and has an anode cathode junction that allows it to be forward-biased, enabling it to control the voltage of a circuit. The diode is packaged in a SOD-123 casing, making it small enough that it is suitable for surface mount use, as well as breadboard use. The diode is lead-free and is compliant with the ROHS standards.