Siemens 49ACR0 NS

Siemens 49ACR0 is a snap‑on, side‑mount auxiliary contact block that provides a single normally open (1NO) signaling contact for Siemens contactors and starters. As a definite‑purpose accessory, it attaches to compatible Siemens devices in a side‑mounted arrangement and is designed to handle main circuits rated 30–60 A FLA with up to 600 V AC. The auxiliary contact itself is rated for 10 A at 600 VAC (NEMA A600) and carries a Class 42 rating, making it suitable for signaling and interlock circuits without imposing significant load on the main contacts. This compact module closes its auxiliary contact in sync with the main contact, enabling straightforward remote monitoring, interlocking logic, or status indication in motor control panels. Typical applications include signaling closures in control circuits, safety interlocks, and auxiliary feedback in panel assemblies and industrial automation environments. By providing a dedicated, isolated contact for control logic, the 49ACR0 helps engineers design reliable, maintainable control schemes around Siemens DP contactors and starters, while preserving space and simplifying wiring within enclosures.