BUY BZX84B20-E3-08 https://www.utsource.net/itm/p/11717389.html

Description: BZX84B20-E3-08 is a SOT23-3 package Zener diode with a voltage of 20V and a power rating of 500mW. Features: Low leakage current High reliability Low noise Low reverse current Low thermal resistance High temperature stability Applications: Voltage regulation Clamping Voltage stabilization Surge protection Overvoltage protection (For reference only)