An electrical device such as this requires reverse leakage current of 50nA @ 18.9V.During operation, the maximum voltage - Zener (Nom) is reduced to 27V volts.As soon as the maximum voltage - Forward (Vf) is supplied, it reaches 900mV @ 10mA V.
BZX84W-C27F Features
reverse leakage current of 50nA @ 18.9V 50nA @ 18.9V is the maximum voltage (Tol)
BZX84W-C27F Applications
There are a lot of Nexperia USA Inc. BZX84W-C27F applications of zener single diodes.