Siemens Q21515CT2 – 15A Quadplex Miniature Circuit Breaker Certified

Built for high-density residential panels, the Siemens Q21515CT2 provides two independent 15A double-pole circuits in a standard two-inch slot. The internal common trip mechanism ensures that if one leg faults, both poles of the pair trip simultaneously, meeting NEC requirements for 240V loads. This plug-on breaker fits Siemens EQ, PL, ES, and Ultimate load centers, and replaces the legacy MP21515CT2.