An electrical device like this requires a reverse leakage current of 200nA @ 19V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 24V.This device must be operated with the working test voltage set to 5mA.
MTZJT-7224C Features
reverse leakage current of 200nA @ 19V 200nA @ 19V is the maximum voltage (Tol) the working test voltage to 5mA minimal dynamic impedance is 5mA
MTZJT-7224C Applications
There are a lot of ROHM Semiconductor MTZJT-7224C applications of zener single diodes.