The reverse leakage current needed to power this electric device is 100nA @ 30V.As part of the operation, the maximum voltage - Zener (Nom) is reduced to 39V.
UDZVFHTE-1739B Features
reverse leakage current of 100nA @ 30V 100nA @ 30V is the maximum voltage (Tol)
UDZVFHTE-1739B Applications
There are a lot of ROHM Semiconductor UDZVFHTE-1739B applications of zener single diodes.