Heatsinks

[sandyeggoxj]

What do you guys recommend? I need to cool 5 dual channel 50-amp SSRs. I plan to put one large heat sink on the top of the metal panel and let the heat radiate up from there. I was looking at ebrewsupply but they are still out of stock. Where else should I shop?

 

[Brumateur]

I'd recommend http://www.heatsinkusa.com Good heatsinks and priced right.

But you need a really huge heatsnk for 5 SSRs. I'd rather use a regular heatsinks like this (http://www.ebay.com/itm/Aluminum-He...-Small-Type-Heat-Dissipation-OH-/261340095890) and a fan.

 

[sandyeggoxj]

Yeah, this will be a (4) 5500w element build when I am done. I am building to handle 4-elements but it will only have 2-elements to start.

 

[sandyeggoxj]

So a 5.8"x22"x1" heatsink is $38. But then it is $22 to ship it! What the heck!?

 

[augiedoggy]

So a 5.8"x22"x1" heatsink is $38. But then it is $22 to ship it! What the heck!?

I bet 5 regular ssr heatsinks all lined up end to end is looking better huh?

 

[sandyeggoxj]

No Joke. They are even din-rail mountable which is handy. Everything else in the panel will be on din rails. I was just hoping to not need a fan. I don't want the giant hole in the panel. I know that the LEDs and switches will allow contaminates in, but not on the volume that a big fan will.

I am only pulling 23 amps per dual channel ssr, do you think I will even need a fan? These are the relays that I am using:

 

[Brumateur]

For 23 amp you need either big heatsink mounted outside or that small DIN-rail heatsinks but only with a fan.

 

[sandyeggoxj]

That is what I was thinking. I'll just keep looking for an external heatsink.

 

[Brumateur]

If you don't like a big hole in your box you can do something like this:

 

[MaverickBrew]

If you don't like a big hole in your box you can do something like this:

This will not allow the airflow needed to cool your box.

 

[Brumateur]

This will not allow the airflow needed to cool your box.

It will. You don't need a huge airflow for this setup.

 

[atoughram]

https://www.homebrewtalk.com/f51/ssr-heat-output-161818/

 

[Facinerous]

I would just cut a big hole in the box. Just big enough to have .25" overlap of heatsink around edges. Mount heatsink directly to box on exterior. Mount ssr directly to heatsink interior. Apply fan if necessary, exterior.

Good luck with whatever you decide.

 

[sandyeggoxj]

Thanks guys. I think I have it figured out now. Facinerous, that is exactly what I am going to do. It will get heat out and keep whatever is floating around from getting inside. At any given time I expect to be dissapating around 60-65 watts of energy. A big sink externally mounted should work great.