An electrical device such as this requires reverse leakage current of 50nA @ 35.7V.During operation, the maximum voltage - Zener (Nom) is reduced to 51V volts.As soon as the maximum voltage - Forward (Vf) is supplied, it reaches 900mV @ 10mA V.
BZT52-B51X Features
reverse leakage current of 50nA @ 35.7V 50nA @ 35.7V is the maximum voltage (Tol)
BZT52-B51X Applications
There are a lot of Nexperia USA Inc. BZT52-B51X applications of zener single diodes.