An electrical device such as this requires reverse leakage current of 100nA @ 10V.During operation, the maximum voltage - Zener (Nom) is reduced to 15V volts.
BZX84B15VLT116 Features
reverse leakage current of 100nA @ 10V 100nA @ 10V is the maximum voltage (Tol)
BZX84B15VLT116 Applications
There are a lot of ROHM Semiconductor BZX84B15VLT116 applications of zener single diodes.