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 5.6V.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).
SFC5V650 Features
reverse leakage current of 5μA @ 3V 5μA @ 3V is the maximum voltage (Tol)
SFC5V650 Applications
There are a lot of SMC Diode Solutions SFC5V650 applications of zener single diodes.