Siemens Q21515CT – 15A Triplex Miniature Circuit Breaker Professional Grade

Engineered for residential distribution, this 15A Siemens triplex breaker delivers two outer 1-pole circuits and one inner 2-pole circuit in a two-space design. The QT series plug-on unit installs into Siemens EQ, PL, ES, and Ultimate load centers. It replaces the discontinued MP21515CT, offering an easy way to add circuits to full panels. Rated at 10kAIC, it utilizes thermal-magnetic trip technology with a common trip for the center poles. HACR and SWD rated.