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.
SMZJ3798BHM3/H Features
reverse leakage current of 5μA @ 18.2V 5μA @ 18.2V is the maximum voltage (Tol)
SMZJ3798BHM3/H Applications
There are a lot of Vishay Semiconductor Diodes Division SMZJ3798BHM3/H applications of zener single diodes.