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Forum Index : Electronics : is there a DIY alternative to contactors

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yahoo2

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Joined: 05/04/2011
Location: Australia
Posts: 1166
Posted: 03:37pm 14 May 2016
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I have been using Gigavac's GX series contactors for years to switch panel banks and heavy DC loads in 48 volt systems.

I am wondering if I could do a home made mosfet alternative to reliably switch 100-180 amp DC. I was looking at a controller that was bulk charging a battery at 90 amps the other day and thought to myself " the fans are running but it doesn't seem to producing that much heat"
I had a bit of a rummage around and found a DC motor drive circuit that uses enhanced mode Power MOSFETS to switch between (p channel)forward and (N channel)reverse.

After that I got a bit lost looking at spec sheets and gave up.

any ideas! comments?
I'm confused, no wait... maybe I'm not...
 
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