Single Zener Diodes
Zener diodes are designed for operation in a reverse-breakdown mode and are characterized according to their behavior when used in this fashion. Useful as a voltage reference or for voltage limiting purposes, they are also capable of functioning as a one-way valve for current flow in the manner of rectifier diodes, though their behavior in this mode is generally less ideal than that of purpose-built devices. Products within this family implement exactly one instance of this function per device package.

Micro Commercial Components (MCC) BZT52C56-TP
Zener Diodes 200mW 56Vz 200mA 400Ohm 0.05uA 39.2Vr
0.03