An electrical device like this requires a reverse leakage current of 3μA @ 4V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 6.2V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
MM5Z6V2ST5G Features
reverse leakage current of 3μA @ 4V 3μA @ 4V is the maximum voltage (Tol)
MM5Z6V2ST5G Applications
There are a lot of ON Semiconductor MM5Z6V2ST5G applications of zener single diodes.