An electrical device like this requires a reverse leakage current of 500nA @ 9.9V.During reverse leakage, the maximum current reaches 500nA.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 13V.Design flexibility is enhanced by its zener current of 9.5mA.For operation, diode reaches 900mV @ 10mA at the maximum voltage - Forward (Vf).For full functionality, this device should have a reverse voltage peak of 500nA.
MMSZ5243B Features
reverse leakage current of 500nA @ 9.9V 500nA @ 9.9V is the maximum voltage (Tol) Reverse leakage current reaches 500nA the zener current of 9.5mA
MMSZ5243B Applications
There are a lot of ON Semiconductor MMSZ5243B applications of zener single diodes.