5% indicates the maximum possible voltage (Tol) of 5%.While operating, the maximum voltage - Zener (Nom) is reduced to 6.2VV.This device should be operated at 7.5mA on the working test voltage.
CMKTC825A TR PBFREE Features
the working test voltage to 7.5mA minimal dynamic impedance is 7.5mA
CMKTC825A TR PBFREE Applications
There are a lot of Central Semiconductor Corp CMKTC825A TR PBFREE applications of zener single diodes.