I am organizing a bunch of components given to me; some of them not put in a labeled bag.
This SMB diode has the marking "1042 MZ" on it and I cannot find any references to this. And I have checked a SMD Code book without finding anything.
I am running out of good ideas :)
Edit: Applying 1V in forward direction made it hot and conduct 2A. Slowly increasing the reverse bias voltage with an LED in series confirmed that it is a unidirectional TVS diode starting to conduct at about 70 volts.