A circuit breaker subassembly is disclosed. The subassembly includes a base, an operating mechanism, a one-piece non-conductive rotor disposed within the base, and a plurality of sets of contact arms supported by the rotor. The rotor is disposed in operable connection with the operating mechanism and includes a rotational degree of freedom relative to the base with portions of the rotor disposed between each set of the plurality of sets of contact arms to define separation portions. The operating mechanism includes a frame disposed within the base, a cradle in pivotal connection with the frame, an upper link in pivotal connection with the cradle, and a lower link having a first end and a second end, the first end in pivotal connection with the upper link and the second end in pivotal connection with the rotor at the separation portions.