I have just started experimenting with a Shelly 2.5 WiFi switch for controlling LED downlights and currently just have it sitting on a bench connected to two 8W downlights (one on each output) which are also sitting on the bench about 1m away.
The Shelly case is getting hot and I’m concerned about putting these in my wall cavity. They have an internal temperature sensor and I read on the Shelly FB page that they will automatically switch off at 90°C.
With no load (both lights off) it sits at around 58°C as reported by internal temp sensor.
With both 8W downlights on, the Shelly reports 86°C after a couple of hours. Using a non contact infrared thermometer, the outside case is at about 63°C - this is quite hot to touch. I note that the LED downlight (also sitting on the bench) is about the same temperature, and this is meant to mount in the ceiling with insulation nearby.
I believe the heat is due to the current sensing circuitry, and also the processor runs warm. Shelly say it’s UL underwriter certified and made from fire proof plastic, they reckon it would eventually melt but not catch on fire.
Does anyone on here have any knowledge in this area? How hot is too hot to put something like this in the wall cavity, or am I worrying unnecessarily?