Siemens CQDA2 Circuit Breaker Auxiliary Block

Siemens CQDA2 Circuit Breaker Auxiliary Block is a two‑pole auxiliary switch block that mounts with compatible Siemens frame breakers to provide two independent A/B contact sets (2A‑2B). The auxiliary contacts are rated for 240 VAC and 125 VDC, with a current rating of 2 A per contact pair, enabling signaling or control interlocks without loading the main circuit. This CQDA2 accessory is designed for use with CQD, CQD6, NGG, HGG, LGG, NGB, HGB, LGB, BQD and BQD6 breakers, expanding the breaker’s functionality in control panels and automation circuits. The main device is intended for use in circuits up to 15 A / 250 VAC, while the two auxiliary contacts provide additional signaling capability in mixed‑voltage environments.