Allen-Bradley 800M-XA Switch Contact Block NEMA-A300 100-300VAC

The Allen-Bradley 800M-XA is a 22 mm open-style contact block that attaches to an 800M-series selector switch or pushbutton to provide an auxiliary contact path, designed for mounting with 22 mm operator assemblies and wiring via quick-connect or screw-terminal connections, making it a compact, modular addition to Allen-Bradley control stations. It comprises one normally open and one normally closed contact, enabling simultaneous signaling and interlock functionality from a single compact block, and it is rated for up to 10 A at 300 VAC, with a U.S. NEMA A300 designation reflected in its electrical targets. The block supports an operating voltage range typically listed as 110–300 VAC, which aligns with common industrial control voltages, and it is built to integrate with 22 mm operator devices so technicians can expand control logic without redesigning enclosures. As a member of the 800M family, the XA variant is frequently used in control panels to implement basic signaling, sequencing, or interlock schemes alongside 800M pushbuttons and selector switches.