An electrical device such as this requires reverse leakage current of 10μA @ 1V.During operation, the maximum voltage - Zener (Nom) is reduced to 3.9V volts.
ACZRM5228B-HF Features
reverse leakage current of 10μA @ 1V 10μA @ 1V is the maximum voltage (Tol)
ACZRM5228B-HF Applications
There are a lot of Comchip Technology ACZRM5228B-HF applications of zener single diodes.