Does it only trigger when 3 standard hits are rolled or can it count crits as hits as well?

Standard hits. If you're opponent somehow rolls three (or more) crits, you're out of luck.

4 minutes ago, Dr Zoidberg said:

Standard hits. If you're opponent somehow rolls three (or more) crits, you're out of luck.

so 2 hits and 2 crits and I am taking all of it?

1 minute ago, Mackaywarrior said:

so 2 hits and 2 crits and I am taking all of it?

Yes, all the while R4-D6 laughs manically as your ship goes down in flames from eating all those crits.

Hopefully you equipped Integrated Astromech.

Thanks everyone!