Westinghouse A-H12 USNT AH12 Auxiliary Switch

The Westinghouse A-H12 USNT Auxiliary Switch delivers reliable auxiliary contact switching for industrial motor control and electrical switching systems. This panel-mounted device (MPN A-H12 USNT) is designed to work with motor starters and contactors, providing auxiliary contacts for circuit control and status monitoring in automation, power management, and heavy industrial applications. It’s commonly used in replacement maintenance and retrofit projects within industrial control panels, motor control centers, and automation systems, with common replacements including Eaton auxiliary contact blocks and Cutler-Hammer industrial auxiliary switches.