An electrical device like this requires a reverse leakage current of 5μA @ 38.8V.During reverse leakage, the maximum current reaches 5μA.For operation, diode reaches 1.2V @ 200mA at the maximum voltage - Forward (Vf).
1N4757AP/TR12 Features
reverse leakage current of 5μA @ 38.8V 5μA @ 38.8V is the maximum voltage (Tol) Reverse leakage current reaches 5μA
1N4757AP/TR12 Applications
There are a lot of Microsemi Corporation 1N4757AP/TR12 applications of zener single diodes.