An electrical device like this requires a reverse leakage current of 100nA @ 53V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 75V.For operation, diode reaches 1.5V @ 200mA at the maximum voltage - Forward (Vf).
1N5267A (DO-35) Features
reverse leakage current of 100nA @ 53V 100nA @ 53V is the maximum voltage (Tol)
1N5267A (DO-35) Applications
There are a lot of Microsemi Corporation 1N5267A (DO-35) applications of zener single diodes.