An electrical device like this requires a reverse leakage current of 5μA @ 3V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 6.12V.
MTZJ6V2SB R0G Features
reverse leakage current of 5μA @ 3V 5μA @ 3V is the maximum voltage (Tol)
MTZJ6V2SB R0G Applications
There are a lot of Taiwan Semiconductor Corporation MTZJ6V2SB R0G applications of zener single diodes.