Siemens CQDA1 1A 250V 1P K N N AUXILIARY CQD6 Auxiliary Contact Block

Siemens CQDA1 is an auxiliary contact block that provides a single normally open contact pair (1A–1B) for Siemens molded‑case circuit breakers. Rated for up to 240 V AC or 125 V DC, it supports a 1 A switching current and is designed as an accessory for CQD/CQD6, BQD, NGG, HGG, LGG, NGB, HGB, and LGB family breakers. The CQDA1 enables remote indication of the breaker’s status by adding an auxiliary contact separate from the main contacts, suitable for signaling in control circuits and simple interlocks in industrial panels. Installation integrates with Siemens’ standard auxiliary-switch interfaces, supporting common control voltages up to 240 V AC or 125 V DC.