An electrical device such as this requires reverse leakage current of 50nA @ 14V.During operation, the maximum voltage - Zener (Nom) is reduced to 20V volts.As soon as the maximum voltage - Forward (Vf) is supplied, it reaches 1.1V @ 200mA V.
BZV55C20 Features
reverse leakage current of 50nA @ 14V 50nA @ 14V is the maximum voltage (Tol)
BZV55C20 Applications
There are a lot of Microsemi Corporation BZV55C20 applications of zener single diodes.