Originally Posted by Pdelcast

Actually, the 4833 has lower resistance than the 4108, but it has several other disadvantages that make the 4108 superior in some applications (like the Mamba Monster.) (I could go into details, but do you really want to hear about maximum current slew rates, turn on induction, and maximum drain dV/dT?)

And Castle is now using the NTMFS4901 for new production (as of about two months ago.) The 4901 is being manufactured exclusively for Castle. The 4901 is a FET that has been tweaked specifically for our application.

Thanx!