An electrical device like this requires a reverse leakage current of 1μA @ 130V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 180V.For operation, diode reaches 1.2V @ 200mA at the maximum voltage - Forward (Vf).
BZD17C180P RHG Features
reverse leakage current of 1μA @ 130V 1μA @ 130V is the maximum voltage (Tol)
BZD17C180P RHG Applications
There are a lot of Taiwan Semiconductor Corporation BZD17C180P RHG applications of zener single diodes.