An electrical device like this requires a reverse leakage current of 50nA @ 23.1V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 33V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
BZT52-C33J Features
reverse leakage current of 50nA @ 23.1V 50nA @ 23.1V is the maximum voltage (Tol)
BZT52-C33J Applications
There are a lot of Nexperia USA Inc. BZT52-C33J applications of zener single diodes.