5.88% is the maximum voltage (Tol) that can be supplied.There is a maximum reverse leakage current that reaches 100nA.In order to operate this device, the working test voltage should be set to 2.5mA.
BZT52C68-HE3-18 Features
Reverse leakage current reaches 100nA the working test voltage to 2.5mA minimal dynamic impedance is 2.5mA
BZT52C68-HE3-18 Applications
There are a lot of Vishay Semiconductor Diodes Division BZT52C68-HE3-18 applications of zener single diodes.