The reverse leakage current for this electrical device should be 100nA @ 21V.5% indicates the maximum possible voltage (Tol) of 5%.While operating, the maximum voltage - Zener (Nom) is reduced to 27VV.For its operation, maximum voltage - Forward (Vf) 900mV @ 10mA is provided.
MMSZ5254B Features
reverse leakage current of 100nA @ 21V 100nA @ 21V is the maximum voltage (Tol)
MMSZ5254B Applications
There are a lot of Rochester Electronics, LLC MMSZ5254B applications of zener single diodes.