I think it should have a mechanical switch so it automatically switches back on in case of power outage.
I posted some info on mine in the past:
It’s made of metal so it does dissipate heat ok, but it doesn’t have any fan though so it might not fit what you’re looking for.
The disk in it does get quite hot during summer (around 50°C indeed), but it doesn’t seem to be a problem so far as this disk model is known to get quite hot anyway…
