A voltage of 5% indicates the maximum voltage (Tol) that can be supplied.This device can only be operated when the working test voltage is set to 1.7mA.
JAN1N4493 Features
the working test voltage to 1.7mA minimal dynamic impedance is 1.7mA
JAN1N4493 Applications
There are a lot of Semtech Corporation JAN1N4493 applications of zener single diodes.