An electrical device like this requires a reverse leakage current of 100nA @ 12V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 16V.For operation, diode reaches 1.2V @ 200mA at the maximum voltage - Forward (Vf).
1N6005B_T50A Features
reverse leakage current of 100nA @ 12V 100nA @ 12V is the maximum voltage (Tol)
1N6005B_T50A Applications
There are a lot of ON Semiconductor 1N6005B_T50A applications of zener single diodes.