what happens if I exceed the maximum rating of the drain-to-source voltage of an N-MOSFET
I am using NTNS3C94NZ so 12 V in this case
does it act as a zener? as a short? is it destructive? what voltage/current can it handle?
I did the test with 20 V, it seems that the over-voltage on the drain leaks to the gate, enables the transistor, that start conducting and pulls the drain low.
so externally, it did act as a ~14 V Zener Drain-to-Source with 20 mA current (dependent on my voltage supply strength). It seems to be still functional after that as the current was limited.