Inkbird SSR Solid State Relay SSR 40DA for PID Thermostat Temperature Controller

I think all the people melting their SSRs didn't get the memo about using a heatsink, although it's written in the product description. I mounted mine to an old CPU heatsink with fan, and after passing a continuous 16A at 120VAC for one hour the SSR was not even warm to the touch. The relay also responds as expected to a 12VDC PWM signal, switching on and off my 120VAC load as expected. I don’t know if this relay has counterfeit TRIACs in it, I don’t know if it could handle anywhere near a 40A load, but if you’re using a cheap SSR like this you should probably plan to run it at a fraction of its rated current with an oversized heat exchanger. Luckily, 16A is the max current of most home circuits in the US, so this should be adequate for most uses, unless you start getting funky with your wiring. Just make sure you’ve got a way to remove the heat and this thing should do you well.

This works perfect for my smoker. Thank you so much

I used this in building a controller for an electronic brew station. It works, followed the wiring schematic online, using a PID controller and a 120 to 240v capacitor to turn the power on and off to the 220v heating element.

I bought this item so that I could use low voltage control to enable and disable my oil-less air compressor. It is easy to install. My air compressor draws about 16 amps at 120VAC single phase. So far this solid state relay is performing as expected. It does say it needs a heat sink. My air compressor only runs for maybe a minute or two at a time, so I haven't noticed any appreciable heat output from this device. I used some heat sink goop on the back and simply mounted it in a 4" square metal electric box that had a smooth back; that seems to give it a bit of heat sink. I used a spare 4.5VDC cell phone charger with the end cut off as the DC supply for control voltage. It seems to be working fine.

I recommend running these with a heat sink but these are quality SSR's and every one I have ever purchased is still working as designed. When I need another SSR, it will be an Inkbird.

I used this in my electric brewing control panel. The previous one burned because of a loose wire connection. You should check connections periodically.

This was a replacement ssr. Had the same one so I knew what I was getting. They do the job .

I used this item in my dust collection system so that I could have low voltage microswitches at each of the blast gates to turn on the dust collector. It is great and the system only comes on when a gate is open and since there is a gate at each tool, it is very efficient.