An electrical device like this requires a reverse leakage current of 500nA @ 38.8V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 51V.
1PGSMC5369 R7G Features
reverse leakage current of 500nA @ 38.8V 500nA @ 38.8V is the maximum voltage (Tol)
1PGSMC5369 R7G Applications
There are a lot of Taiwan Semiconductor Corporation 1PGSMC5369 R7G applications of zener single diodes.