Siemens CQD115 Circuit Breaker With Auxiliary Switch

Siemens CQD115 is a 15 A, 1-pole molded‑case circuit breaker in the CQD family designed for 277 VAC service, delivering a 14 kA (RMS) interrupting rating to protect circuits against short circuits in lighting and general power applications. This 1‑pole unit is DIN‑rail mountable and suitable for residential, commercial, or industrial panel installations where a single conductor needs protection. It is compatible with the CQDA1 auxiliary switch accessory to provide an additional signaling path or control interface without adding a separate device footprint, and CQDA1 is the Siemens auxiliary switch option offered for CQD breakers.