Westinghouse Electric AO-30 Overload Thermal Unit

The Westinghouse AO-30 Thermal Unit Heater Element provides dependable thermal overload protection for industrial motor control systems, safeguarding automated equipment and machinery in commercial and industrial facilities. This 3 Amp unit, identified by Manufacturer Part Number AO-30 and built under the Westinghouse brand as a Product Type Thermal Unit Heater Element, is designed for installation in relay- and starter-mounted components and is compatible with motor starters and overload relays, making it well suited for motor control centers, industrial pumps, conveyor systems, compressors, processing machinery, and other factory automation equipment that require reliable overload protection. It is commonly used by maintenance teams, OEM technicians, and system integrators for replacement, retrofit, overload relay servicing, and motor protection maintenance across automated machinery and process equipment, providing a modular approach to protecting motors in industrial environments. Common replacements for this unit include Eaton H2003B, Allen-Bradley W30, and Square D B3.00 Thermal Unit.