An electrical device such as this requires reverse leakage current of 3μA @ 1V.During operation, the maximum voltage - Zener (Nom) is reduced to 4.7V volts.As soon as the maximum voltage - Forward (Vf) is supplied, it reaches 1.2V @ 200mA V.
BZG05B4V7-M3-18 Features
reverse leakage current of 3μA @ 1V 3μA @ 1V is the maximum voltage (Tol)
BZG05B4V7-M3-18 Applications
There are a lot of Vishay Semiconductor Diodes Division BZG05B4V7-M3-18 applications of zener single diodes.