Siemens Q23030CT QT Quad Circuit Breaker is a four‑pole, 30‑amp protective device for 120/240 V AC service, designed to fit Siemens panels that accept QT quad breakers. The unit uses a 1/2‑inch frame per pole and is CTL‑type compatible, enabling proper mounting in supported Siemens panels that specify QT quad breakers. UL 489 listed, this 120/240 V, 30 A per pole breaker provides four‑pole protection suitable for multi‑wire branch circuits in residential and light commercial distribution.
