A mounting assembly is for an electrical switch, such as for example, a dimmer switch, which includes a heat sink. The mounting assembly includes a switching member, an insulator disposed between the switching member and the heat sink, and a separate cover member overlaying the switching member. The separate cover member is structured to secure the switching member and the insulator to the heat sink. The switching member includes a switch body and a conductive tab. The separate cover member secures the switching member to the heat sink, without requiring a separate fastener to be inserted through a hole in the conductive tab. The insulator electrically isolates the conductive tab from the heat sink.