BUY BZT52-C5V1S https://www.utsource.net/itm/p/4301289.html
SURFACE MOUNT SILICON ZENER DIODES
Description: Zener Diode, 5.1V, 500mW, SOD-323 Features: - Low leakage current - Low noise - High reliability - High temperature soldering guaranteed: 260°C/10s - RoHS compliant Applications: - Voltage regulation - Voltage stabilization - Surge protection - Clamping - Polarity protection - Signal clipping (For reference only)