An electrical device like this requires a reverse leakage current of 500nA @ 69.2V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 91V.
2M91ZHB0G Features
reverse leakage current of 500nA @ 69.2V 500nA @ 69.2V is the maximum voltage (Tol)
2M91ZHB0G Applications
There are a lot of Taiwan Semiconductor Corporation 2M91ZHB0G applications of zener single diodes.