An electrical device like this requires a reverse leakage current of 500nA @ 79.2V.During reverse leakage, the maximum current reaches 500nA.For operation, diode reaches 1.2V @ 1A at the maximum voltage - Forward (Vf).
SMBJ5379A/TR13 Features
reverse leakage current of 500nA @ 79.2V 500nA @ 79.2V is the maximum voltage (Tol) Reverse leakage current reaches 500nA
SMBJ5379A/TR13 Applications
There are a lot of Microsemi Corporation SMBJ5379A/TR13 applications of zener single diodes.