The SIEMENS 3SU1400-1AA10-1CA0 is a contact module with a single normally closed contact element, designed for front-plate mounting and wired via screw terminals. It provides a compact, straightforward solution for adding a dedicated NC contact to control panels or switch assemblies. The screw terminals allow secure, low-maintenance connections, and the front-mount design keeps installation accessible for routine checks and replacements. Ideal for machine control, safety circuits, and signal interruption tasks where a reliable NC contact is required. Sold in minimum quantities of five or multiples thereof to support project purchasing and panel outfitting.