On Sun, Nov 16, 2003 at 01:49:19AM -0800, Syd Levine (AnaLog)
enlightened us thusly
> I just replaced two IRF820 mosfets with IRF840 mosfets. The 820s were
> bad, but the device still won't work. Should the 840 work OK in place
> of the 820, or have I created a new problem with the substitution?
You're fine unless they are sharing current with other irf820s, in which
case they will hog it. They have similar voltage specs, but lower
resistance and hence higher current.
They need about 10V on the gate if you're switching. How were the 820s
bad? That will point you to your problem.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
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