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**dmjlambert** · 06-17-2018, 12:05 PM

The annoying thing about heat sinking a power MOSFET is the tab is connected to drain, so that makes the heat sink have live power. So, isolated in a can like you mention would be good, but then you will probably have to circulate air through the can, perhaps with a cooling fan.

Regarding solid state relays, I have read cheap Chinese relays that are sold on Amazon and eBay are mostly counterfeit or fake, and have ratings that are not supported by the actual components in them, and are susceptible to fire or failure. So, I would recommend sticking with a supplier like Mouser, Digi-Key, Sparkfun, or Adafruit.

I am thinking a conventional relay may be best for those high currents.

06-17-2018, 12:05 PM	#20
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,574	Re: Any electronics nerds interested in Arduino/Atmel? The annoying thing about heat sinking a power MOSFET is the tab is connected to drain, so that makes the heat sink have live power. So, isolated in a can like you mention would be good, but then you will probably have to circulate air through the can, perhaps with a cooling fan. Regarding solid state relays, I have read cheap Chinese relays that are sold on Amazon and eBay are mostly counterfeit or fake, and have ratings that are not supported by the actual components in them, and are susceptible to fire or failure. So, I would recommend sticking with a supplier like Mouser, Digi-Key, Sparkfun, or Adafruit. I am thinking a conventional relay may be best for those high currents.