Allen-Bradley X-127643 Overload Relay Size 4 Starters

Allen-Bradley X-127643 is a Right-Hand overload relay from Allen-Bradley, designed for use with Size 4 motor starters in Rockwell Automation's control hardware lineup. The part number X-127643 identifies this specific overload protection device within the Allen-Bradley family, reinforcing its role as a dedicated replacement part for compatible Size 4 starters in service and maintenance programs. When installed as part of a Size 4 starter, this overload relay integrates into a motor-control circuit to provide electrical protection and safeguard motors and related equipment in industrial automation environments. The designation 'R.H.' on the associated description suggests a Right-Hand orientation to support proper fitment and alignment within compatible starter configurations, guiding technicians in correct installation within the Allen-Bradley starter ecosystem. As a protective component, it complements other standard starter hardware in many industrial applications where Allen-Bradley equipment is deployed.