An electrical device such as this requires reverse leakage current of 10μA @ 1V.During operation, the maximum voltage - Zener (Nom) is reduced to 5.1V volts.
ZM4733A-GS08 Features
reverse leakage current of 10μA @ 1V 10μA @ 1V is the maximum voltage (Tol)
ZM4733A-GS08 Applications
There are a lot of Vishay Semiconductor Diodes Division ZM4733A-GS08 applications of zener single diodes.