An electrical device like this requires a reverse leakage current of 10nA @ 42.6V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 56V.For operation, diode reaches 1.1V @ 200mA at the maximum voltage - Forward (Vf).
1PMT4127E3/TR13 Features
reverse leakage current of 10nA @ 42.6V 10nA @ 42.6V is the maximum voltage (Tol)
1PMT4127E3/TR13 Applications
There are a lot of Microsemi Corporation 1PMT4127E3/TR13 applications of zener single diodes.