MSFormosa MS's BZT52C20 is a Zener diode device in the SOD-123 package, with RoHS (Restriction of Hazardous Substances) compliance. It has a maximum working voltage of 20 volts, with a reverse break-down voltage of 5 to 11 volts and a power dissipation of 500 mW. The device also has an operating temperature range of -65 to +125 °C, making it suitable for a variety of applications. Additionally, this device has a maximum Zener impedance of 30 ohms at 5 volts and a response time of 200 ns. It is used in high efficiency voltage regulation, voltage reference circuits, over-voltage protection, and some switching control applications.