An electrical device like this requires a reverse leakage current of 5μA @ 18.2V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 24V.
1N4749AHR1G Features
reverse leakage current of 5μA @ 18.2V 5μA @ 18.2V is the maximum voltage (Tol)
1N4749AHR1G Applications
There are a lot of Taiwan Semiconductor Corporation 1N4749AHR1G applications of zener single diodes.