Schneider Electric S29450 Auxiliary Contact Block

The Schneider Electric S29450 Auxiliary Contact Block is a PowerPact circuit-breaker accessory that adds a single changeover contact to PowerPact H‑ and J‑/L‑frame molded case breakers, enabling explicit status indication or alarm signaling. The unit provides a 1A/1B changeover contact (commonly described as 1NO-1NC) that can be driven by 24 V AC or 24 V DC control signals, and it specifies a minimum load of about 100 mA, with wiring via screwless spring terminals for quick installation. As an OF/SD/SDE kit, the S29450 can function as an auxiliary switch, an alarm switch, or an adapter depending on how it is mounted in the breaker, and Schneider lists it for use with PowerPact frames with suffix AA. In practical terms, it supplies an external electrical signal of breaker status (open/closed) or a trip/alarm condition that can be used by remote monitoring or automation systems in industrial power-distribution setups.