Adapter for the contacting of a power switch on a busbar system, comprising a housing (1), which has a first mounting side (2) for fastening and electrically contacting the adapter to at least one busbar of a busbar system and a second mounting side (3) for fastening and electrically contacting a power switch on the housing (1), characterised in that on the second mounting side (3) for the fastening of a power switch, at least one rotary disk (4) is fastened to a plurality of sets of threaded sockets (5) in a rotatably mounted manner about an axis of rotation perpendicular to the mounting sides (2, 3), wherein each set of threaded sockets (5) for mounting of a defined type of power switch is configured such that depending on the actuating position of the rotary disk (4) each of the sets of threaded sockets (5) is arranged in a mounting position for a defined type of power switch.
