800T-XA4 | Allen-Bradley 800T Contact Block, Shallow Block, 2 N.C. Contacts

The 800T-XA4 is a shallow contact block designed for use with 30 mm push-button control stations in industrial environments. It features 2 normally closed (N.C.) contacts, making it ideal for fail-safe or safety-related applications where the circuit remains closed under normal conditions. When the button is pressed, these contacts open to interrupt the circuit. This functionality is critical in emergency stop circuits or interlocks. It supports reliable and consistent performance even in demanding automation systems.

The 800T-XA4 is a shallow-profile block, optimized for applications where panel space is limited. While exact millimeter dimensions are typically included in the mechanical drawings, it is designed to fit into 30.5 mm mounting holes, standard for the 800T series. Its reduced depth makes it suitable for compact enclosures. Despite its small size, it delivers high contact reliability and current-handling capacity. This is beneficial for modern, space-efficient control panel layouts.

The 800T-XA4 uses a base mounting type, designed to attach securely behind 30 mm push-button operators. This ensures firm mechanical stability and proper alignment with actuation components. Its compatibility with Allen-Bradley push-buttons allows easy integration. The block clicks into place and maintains solid electrical contact. This mounting method is efficient and reduces installation time.

Although primarily intended for Allen-Bradley 800T push-button assemblies, the 800T-XA4 may function with compatible 30.5 mm devices from other manufacturers. However, exact mechanical and electrical compatibility should be confirmed before cross-brand installation. Allen-Bradley designs its components for tight tolerances and optimal interconnectivity. For full functionality and safety, using matched components from the same series is highly recommended. This avoids issues with misalignment or poor contact engagement.

Yes, the 800T-XA4 is currently in production and remains available through Rockwell Automation and authorized distributors. It is part of the well-established 800T series, which is known for its long product lifecycle and backward compatibility. If a similar product is needed, Allen-Bradley also offers replacement blocks with different configurations. Continued production ensures support for legacy and new control panel designs. Spare parts are readily accessible for maintenance needs.