Siemens CQDA1 is an auxiliary switch accessory for CQD-series molded-case circuit breakers. It provides a pair of auxiliary contacts (1A/1B) rated for 240 VAC and 125 VDC, enabling remote signaling of breaker status in control circuits. Compatible with CQD, CQD6, NGG, and NGB frame breakers (regional catalog variants include CQDA1 and CQDA1BA).
