The reverse leakage current needed to power this electric device is 100nA @ 19V.As part of the operation, the maximum voltage - Zener (Nom) is reduced to 25V.
ACZRM5253B-HF Features
reverse leakage current of 100nA @ 19V 100nA @ 19V is the maximum voltage (Tol)
ACZRM5253B-HF Applications
There are a lot of Comchip Technology ACZRM5253B-HF applications of zener single diodes.