An electrical device such as this requires reverse leakage current of 200nA @ 15V.During operation, the maximum voltage - Zener (Nom) is reduced to 18.49V volts.
MTZJ20SA R0G Features
reverse leakage current of 200nA @ 15V 200nA @ 15V is the maximum voltage (Tol)
MTZJ20SA R0G Applications
There are a lot of Taiwan Semiconductor Corporation MTZJ20SA R0G applications of zener single diodes.