An electrical device like this requires a reverse leakage current of 5μA @ 1V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 4.3V.For operation, diode reaches 1.1V @ 200mA at the maximum voltage - Forward (Vf).
1N5229B A0G Features
reverse leakage current of 5μA @ 1V 5μA @ 1V is the maximum voltage (Tol)
1N5229B A0G Applications
There are a lot of Taiwan Semiconductor Corporation 1N5229B A0G applications of zener single diodes.