MSThe BZT52B5V1S with Zener Diodes SOD-323 RoHS is a formosa MS device, manufactured in a SOD-323 RoHS package, and is a Zener diode. This diode is designed to regulate voltages and protect circuits from being over-voltaged. It has a very low zener voltage of just 5V, making it suitable for use in low-voltage applications. The device has an ESD (electrostatic discharge) rating of 4kV, meaning that it has good protection from ESD events. The BZT52B5V1S is compliant to RoHS standards, which means that it contains no hazardous substances. This device is suitable for applications that require high performance and reliability.