5% is the maximum voltage (Tol) that can be supplied.Zener single diode is important to note that during operation, the maximum voltage - Zener (Nom) is reduced to 5.6V.When the maximum voltage - Forward (Vf) is supplied for its operation, it reaches 1.1V @ 200mA.
1N3512A Features
1N3512A Applications
There are a lot of Microsemi Corporation 1N3512A applications of zener single diodes.