An electrical device such as this requires reverse leakage current of 500nA @ 130.4V.During operation, the maximum voltage - Zener (Nom) is reduced to 170V volts.
2M170Z A0G Features
reverse leakage current of 500nA @ 130.4V 500nA @ 130.4V is the maximum voltage (Tol)
2M170Z A0G Applications
There are a lot of Taiwan Semiconductor Corporation 2M170Z A0G applications of zener single diodes.