Yes, there area few examples from Voyager.

Janeway uses the code "Janeway-Pi-1-1-0" in the season 2 episode 17, "Dreadnought:"

> JANEWAY: Computer, initiate the self-destruct sequence. Authorisation Janeway pi one one zero. Set it at twenty minutes. 

and then again a few episodes later in season 2 episode 21, "Deadlock":

> JANEWAY 2: Move it, Ensign! That's an order! Computer, initiate the self-destruct sequence. Authorisation Janeway pi one one zero. Set at five minutes and mute voice warnings. Enable.