An electrical device like this requires a reverse leakage current of 100nA @ 15.4V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 22V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
BZT52B22-G RHG Features
reverse leakage current of 100nA @ 15.4V 100nA @ 15.4V is the maximum voltage (Tol)
BZT52B22-G RHG Applications
There are a lot of Taiwan Semiconductor Corporation BZT52B22-G RHG applications of zener single diodes.