The ABB B6-30-10-01 is a miniature contactor from the B6 series, non-reversing with three poles rated at 12 A and a 24 VAC coil. It includes one normally open (NO) auxiliary contact and uses screw terminals for wiring. This form factor is designed for compact panel layouts where space is tight — common in small motor control and lighting circuits.
The 12 A rating covers small motor loads (up to roughly 3 kW at 400 V three-phase) and resistive heating circuits. Three poles switch all phases simultaneously, so it handles three-phase loads without a separate contactor for each line. The 24 VAC coil is a common control voltage in older panels and some European installations — verify your control transformer matches, as a 24 VDC coil will not hold in on AC-rated suppression.