An embodiment of the invention relates to a switch pole of a circuit breaker having two pole shells between which are disposed, in the assembled state, at least one switching contact, current-carrying elements and an arc quenching device having an arc runner plate and at least one splitter plate delimiting an arc chute, wherein at least one slot for accommodating the splitter and/or arc runner plate is provided between the pole shells. In at least one embodiment, there is provided inside between the pole shells a functional component having a least one slot spaced apart from the pole shells which is used to accommodate the at least one splitter and/or arc runner plate.