Allen-Bradley 100-A09NS3 AC Magnetic Contactor

Allen-Bradley 100-A09NS3 AC Magnetic Contactor is a three-pole, coil-operated switch used to control three-phase motor loads and other inductive circuits in industrial automation. Built by Rockwell Automation under the Allen-Bradley brand, this contactor provides rugged, dependable power switching in control panels, enabling motors, pumps, fans, and compressors to start and stop under load with remote or PLC-driven control. As part of the broader Allen-Bradley contactor family, it is designed for panel integration with standard mounting footprints and is operated by a low-voltage control signal energizing the coil to close the main contacts and release to open them, delivering reliable control in industrial environments. For coordinated motor protection, it is commonly used with an overload relay and is compatible with typical control circuits in manufacturing, processing, and packaging applications, where dependable switching of AC power is required and space within enclosures is at a premium.