An electrical device such as this requires reverse leakage current of 5μA @ 29.7V.During operation, the maximum voltage - Zener (Nom) is reduced to 39V volts.
SMZJ3803BHE3_A/I Features
reverse leakage current of 5μA @ 29.7V 5μA @ 29.7V is the maximum voltage (Tol)
SMZJ3803BHE3_A/I Applications
There are a lot of Vishay Semiconductor Diodes Division SMZJ3803BHE3_A/I applications of zener single diodes.