The reverse leakage current for this electrical device should be 5μA @ 1V.While operating, the maximum voltage - Zener (Nom) is reduced to 3.9VV.For its operation, maximum voltage - Forward (Vf) 900mV @ 10mA is provided.
BZX84C3V9_D87Z Features
reverse leakage current of 5μA @ 1V 5μA @ 1V is the maximum voltage (Tol)
BZX84C3V9_D87Z Applications
There are a lot of ON Semiconductor BZX84C3V9_D87Z applications of zener single diodes.