Circuit breaker with mounting clip

A circuit breaker (2) has a mounting clip (24) for mounting the breaker to rail structure (6) in a panelboard (10). The clip is movable to a disengaging position to allow the breaker to be mounted against a back wall (34) of an enclosure (36) by standard mounting bolts (35-38), without interference by the clip. The clip is pivotally and translationally mounted to the breaker housing (14), for pivotal movement between engaging and non-engaging positions, and for translational movement between extended and retracted positions. Locking structure (86,88) prevents pivoting of the clip from the engaging to the non-engaging position when the clip is in the translationally extended position.