An electrical device like this requires a reverse leakage current of 700nA @ 5V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 8.2V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
BZT52-B8V2X Features
reverse leakage current of 700nA @ 5V 700nA @ 5V is the maximum voltage (Tol)
BZT52-B8V2X Applications
There are a lot of Nexperia USA Inc. BZT52-B8V2X applications of zener single diodes.