The BZT52C12S is a Zener diode manufactured by the AnBon electronics company. It is in the Surface-mount SOD-323 form factor, RoHS compliant, and offers 12 volts of voltage regulation for circuit protection. This diode is used for reverse voltage protection in a variety of applications, such as switching power supplies, motor control systems, computer motherboard protection, and other static protection circuits. It has a low power consumption of maximum 0.5mW, a high efficiency of 72% and a peak forward voltage of 1.1V. The BZT52C12S is rated with an operating temperature range of -55 °C to +150 °C and has a high surge current rating of 200mA for the peak pulse current. It is also highly reliable, making it suitable for long-term performance.