An electrical device like this requires a reverse leakage current of 5μA @ 16.7V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 22V.
SMZJ3797BHE3_A/I Features
reverse leakage current of 5μA @ 16.7V 5μA @ 16.7V is the maximum voltage (Tol)
SMZJ3797BHE3_A/I Applications
There are a lot of Vishay Semiconductor Diodes Division SMZJ3797BHE3_A/I applications of zener single diodes.