An electrical device like this requires a reverse leakage current of 32.9mA @ 50mV.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 47V.For operation, diode reaches 1.5V @ 100mA at the maximum voltage - Forward (Vf).
BZX79B47 A0G Features
reverse leakage current of 32.9mA @ 50mV 32.9mA @ 50mV is the maximum voltage (Tol)
BZX79B47 A0G Applications
There are a lot of Taiwan Semiconductor Corporation BZX79B47 A0G applications of zener single diodes.