Sizing MOSFET Heat Sink
12 volt solid state relay. Parallel MOSFETS opto coupler driver. MOSFETS are 100 ampere 3 milliohm 50 volt. TO220 case. Ham Operators.... Any ideas for proper heat sink selection? Individual ...
Forum Discussion
MEXICOWANDERER wrote:
Chris, this is worst case at max Ip. Closer to 1 watt combined total for all MOSFETS.
I know of no mechanical relay that would eat less than 24 amp hours daily. I am building the relay at 100 amperes capacity but never expect to get anywhere near that. Not even a half. Probably at most a third.
A mechanical relay with a neodymium magnet hold-in, a screw jack and motor would be ideal for rarely switched loads.
The Intellitec latching relays are good for 100 amps, and draw zero volts until you actually switch them.
