Some of the specs on that part look excessive.  You'll want to match the specs as closely to this as possible: https://www.dropbox.com/s/w4m5vu4k5jgopk8/qm3022m6_ubiq.pdf

It's basically a 30v N-Channel mosfet with a 7mOhm RDSon and a 76A ID@25c (Continuous current drain at 25c).  You'll want to match the gate charge as close as possible as well.

I burnt out that same mosfet (3022m) and replaced it with the following: http://www.ti.com/product/CSD17552Q5A.  I blew my mosfet when curiosity got the best of me and I tried to dual mine with the voltmod at 1100Mhz.  Moral of the story...don't do that.  Don't even think of doing it.  I replaced my mosfet with the one from TI and it's back up and running but it's a little crippled.  Chip 3 seems to generate some errors no matter what speed, but it still hashes and I still get around 439khs from that gridseed.