This value (Tol) represents the maximum voltage that can be supplied.Zener (Nom) voltage is reduced to 12V during operation.This device should be operated with 10mA as the working test voltage.1.1V @ 200mA is achieved when the maximum voltage - Forward (Vf) is applied for its operation.
1N3520A Features
the working test voltage to 10mA minimal dynamic impedance is 10mA
1N3520A Applications
There are a lot of Microsemi Corporation 1N3520A applications of zener single diodes.