An electrical device like this requires a reverse leakage current of 200nA @ 7V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 10V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
BZX79-C10,133 Features
reverse leakage current of 200nA @ 7V 200nA @ 7V is the maximum voltage (Tol)
BZX79-C10,133 Applications
There are a lot of Nexperia USA Inc. BZX79-C10,133 applications of zener single diodes.