Ensure reliable operation of your motor control system with the Eaton XTCEXMLB Frame B Mechanical Interlock. This accessory is designed to prevent two contactors from closing simultaneously, enhancing safety and preventing equipment damage. Compatible with specific XTCE and XTCF contactor models, it offers horizontal mounting for efficient integration into your control panel..The Eaton XTCEXMLB is a mechanical interlock accessory designed for horizontal mounting with specific Eaton XTCE and XTCF contactor models. It provides a safety mechanism to prevent simultaneous closing of two contactors. The interlock features a B-N frame size and is certified to UL, CCC, ATEX, IEC/EN 60947, and CSA standards.