Siemens Q23020 General Purpose Circuit Breaker

The Siemens Q23020CT2NC Quadplex circuit breaker is a 120/240 VAC plug-in unit in the QT/Q-series designed for residential and light commercial panels. This quadplex device provides four poles within a single assembly, rated for 30 A on two poles and 20 A on the other two, enabling mixed circuit protection in a compact frame. It carries a 10 kA short-circuit interrupt rating at 240 V and uses a thermal-magnetic trip mechanism for reliable protection; it is non-common-trip (NC), so the two two-pole sections can trip independently. Mounting is plug-in, compatible with Siemens QT frames, and suitable for 120/240 V, 50/60 Hz systems.