US or UK? The device selection does vary somewhat.
Also, I’m not sure what you mean by “one panel.“
In the US, this is a typical triple gang switch. It is about three times wider than a single switch.
In the US, this is a typical single gang switch with three controls. It is the same size as a single switch.
In the UK, this is a triple gang switch. The faceplate has the same dimensions as a single switch, there are just more buttons on it.
