Siemens Q24030CT2 – 40/30A Quadplex Miniature Circuit Breaker Top Rated

Part of the QT series, the Siemens Q24030CT2 is a space-saving quadplex breaker designed for residential electrical distribution. It combines a 40A outer pair and a 30A inner pair into a single unit to maximize panel capacity. This plug-on miniature breaker mounts into Siemens EQ, Ultimate, PL, and ES series load centers, and serves as a drop-in replacement for the legacy Q24030. Rated for 10kA at 120/240VAC, it features common trip mechanisms for both the inner and outer circuit pairs.