Review on Inkbird Solid Temperature Controller with Thermostat Function by Jay Kenville

Update: It's been about 3.5 years since they were installed. The one below works best. The load is constantly around 17.5A when on. Whatever happened, it failed when on and the terminal melted a bit. For additional cooling, the case is equipped with an 80mm fan. I'll probably strip more of the wire and wrap it around the screws for better contact. Original: I have no idea if this device is actually rated for 40A but I only need it for a 25A load. Intentionally overrated based on YouTube videos saying SOME sources were half finished fakes; neither can be said here, since destructive efforts will be required to establish it. After powering on for a few minutes, the device and heatsink are still below 100F with an ambient temperature in the mid 60's. The 3.3V signal from the controller is great for switching devices.