An electrical device like this requires a reverse leakage current of 100nA @ 8V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 13V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
BZX84W-C13X Features
reverse leakage current of 100nA @ 8V 100nA @ 8V is the maximum voltage (Tol)
BZX84W-C13X Applications
There are a lot of Nexperia USA Inc. BZX84W-C13X applications of zener single diodes.