DigiKey sells a TO-263 version of the NDS8410A for $1.66.
How a FET works is a complete mystery to me. looking at the data sheet, it looks like pins 5, 6, 7, and 8 are all on the same lead (internally).
Well, I would like a pin through hole style replacement for this 8410A. What do I need to look for? I like to buy parts from Allelectronics if possible. Some FETs they have include a 3 pin, TO-220, 26A/50V, and a 3 pin, TO-220 75A/25V. Could I use either of these, or do I need to know more about them? They also have some 8 pin DIP Op amps but do not list specs or model numbers for those.