Siemens Q22040CTU Quad Contactor 4 Pole 240 Volt

Siemens Q22040CTU is a QT-series quadplex circuit breaker that combines two outer 20-amp single-pole sections with an inner 40-amp double-pole section in a single four-pole unit, designed for 120/240V AC service in residential and light commercial panels. This plug‑in breaker is configured to deliver two 20 A poles and one 40 A double-pole section within a compact, half‑inch‑per‑pole width, optimizing panel space in QT installations. It features a 10 kA short‑circuit interrupt rating and employs a thermal‑magnetic trip mechanism for reliable overcurrent protection. Typical applications include protecting a mix of 120V circuits along with a 240V circuit in the same Siemens QT panel, enabling dense, efficient wiring layouts without sacrificing individual circuit protection. The Q22040CTU designation identifies this specific quadplex arrangement in the QT family, engineered for plug‑in installation in compatible Siemens load centers and designed to maximize panel capacity by consolidating three circuit elements into one unit while preserving protection on each pole.