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See terms for more details. Aux Cont Ser A 3 Poles you’d like to sell Definite Purpose Contactors are electrical components used to switch electrical loads on and off in industrial applications. They are designed for specific purposes such as motor control or lighting control. About MFG: Allen-Bradley is part of Rockwell Automation. Rockwell Automation is built on a strong foundation of integrity. Our reputation for quality reliability and innovation is represented by the brands our products software and services carry. Allen-Bradley is a brand of industrial automation and information technology products. Founded in 1903 by Lynde Bradley and Stanton Allen as the Compression Rheostat Company Allen-Bradley started as a manufacturer of electrical components such as rheostats switches and relays. Allen-Bradley later developed programmable logic controllers PLCs human-machine interfaces HMIs sensors software and more. Allen-Bradley is owned by Rockwell Automation since 1985. All trademarks brand names and brands appearing herein are the property of their respective owners.