The BZT52C18S with Zener Diodes SOD-323 RoHS is a two-terminal diode manufactured by Microdiode Electronics. This diode is an ESD protection device with a zener voltage of about 18V and a current of 500mW. It's made with surface-mount technology so it can be used for a wide variety of applications. This diode is RoHS compliant and meets the international standards of lead-free components. It's also made from materials of the highest grade, providing reliability and stability in its performance. This diode can be used in various electronics, including automotive, telecommunications, power supplies, and motor control systems.