Cutler-Hammer C320MSC4 Auxiliary Contact 2NO 2NC

Cutler-Hammer C320MSC4 is an auxiliary contact block in Eaton's Cutler-Hammer line, part number C320MSC4, Series A1. It provides two normally open (NO) contacts and two normally closed (NC) contacts (2NO 2NC) in a single unit. This auxiliary contact is designed to be used with a main switching device to provide signaling or feedback in control circuits without altering the primary switching function. The 2NO/2NC arrangement supports reporting both states of the main device, enabling simple interlock or status signaling in electrical panels or automation assemblies. As part of the Cutler-Hammer product family, the C320MSC4 shares the standard contact interface associated with this series. The Series A1 designation identifies its generation within the product family, distinguishing it from other configurations in the line.