If we knew what we were doing, we wouldn't call it research, would we?
The only real drawback of the Mark VIII fan is that it draws a hungry 30 to 40 continuous amps, and can momentarily spike up to a 100-amp draw at startupRead more: http://www.popularhotrodding.com/tech/1005phr_project_fox_cooling_system/viewall.html#ixzz2SA8HeIfU
I am looking for variable speed control through a digital out (pwm).
I wonder if a fan running at under full speed get the air up to enough velocity to drive through the core of the radiator.
Is there a disadvantage to having the MOSFET oversized?The irf3205 is rated for 55v... Is there anything to be gained by finding something rated in the 20v range?
The mosfets you've linked to are not bad, but there are even better ones, e.g. http://uk.farnell.com/nxp/buk952r8-60e/mosfet-n-ch-60v-120a-to-220ab/dp/2254216. Bear in mind that if you use a mosfet driver chip, you are not limited to using logic-level mosfets.
A few weeks ago I read (it could be on this forum) that the TO-220 could not have 100A through the pins, even though the mosfet was specified for that amount of current.