Siemens Q23030CT2N Quad Pole Molded Case Circuit Breaker

Siemens Q23030CT2N Quad Pole Molded Case Circuit Breaker is a QT‑series quadplex protective device designed for 120/240 V AC service. It provides four poles in a single enclosure (two outer poles and two inner poles) with a rated 30 A per pole and a 10 kA interrupt rating at 240 V, making it suitable for handling multiple 120/240 V circuits from one compact unit. This thermal‑magnetic breaker uses separate long‑time and instantaneous trip functions to protect feeders and branch circuits from overloads and short circuits, and it is designed for plug‑in mounting into compatible Siemens panels. The quadplex configuration enables converting two adjacent spaces into four poles, which is especially useful in residential or light commercial panelboards where panel space is at a premium. Variant options for the Q23030CT2 family often include INSTA‑WIRE terminal configurations to simplify wiring, while maintaining compatibility with Siemens QT panel systems that expect four‑pole protection in a single assembly. In practice, you’ll find this model used to protect multiple 120/240 V circuits in a single, compact device, delivering coordinated protection across all four poles without requiring separate breakers.