ABB A9-40-00 4-Pole AC Electromechanical Motor Contactor

ABB A9-40-00 is a four-pole, AC-operated motor contactor designed to reliably switch three-phase motors and other inductive loads in control panels. It uses a 220–240 V AC coil to energize four normally open contacts, enabling a low-voltage control circuit to safely interrupt the high-voltage power circuit. This model is designed to switch voltages up to 600 VAC and, in typical configurations, carries a current rating around 25 A (AC-3) for common motor starting and running loads; exact ratings vary by regional variant and specific coil/auxiliary options. The A9-40-00 belongs to ABB’s A9 family of contactors, offering a compact solution that integrates with standard motor-control accessories to form complete starters. Typical applications include conveyors, pumps, fans, and other equipment where reliable switching of medium-sized motors is required at up to 600 VAC.