A maximum voltage (Tol) can be supplied if 3.02% is set.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 4.3V.This device must be operated with the working test voltage set to 20mA.
TFZTR4.3B Features
the working test voltage to 20mA minimal dynamic impedance is 20mA
TFZTR4.3B Applications
There are a lot of ROHM Semiconductor TFZTR4.3B applications of zener single diodes.