Asea Brown Boveri A50-30-00 Three-Phase AC Contactor

ABB A50-30-00 is a three-pole AC contactor from the A-Line family, designed to switch three-phase motors and other heavy loads in industrial power circuits. An AC control coil powers the device, with common versions rated for 230–240 V at 50/60 Hz. At 400 V, the unit is specified for 100 A in AC-1 service and 50 A in AC-3 service. These ratings, along with its compact three-pole form factor, make it a staple in motor-control panels, MCCs, pumps and fan assemblies, conveyors, and HVAC equipment. ABB's A-Line accessories, such as auxiliary contact modules, are compatible with the A50-30-00 to extend control logic. Variants exist with different coil voltages for different control standards, including the 230–240 V coil common on 50 Hz/60 Hz systems.