The ABB B6-30-01-80 is a 3-pole contactor with a coil rated for 240/40-450 V, part of the B6 series. This is a switching device for motor loads or resistive circuits in control panels, typically snap-mounted on DIN rail.
The 3-pole form factor and DIN-rail mounting suit it for panel integration where a compact motor starter or load switch is needed. The 240/40-450 V coil covers common control voltages across 240 V and 400 V line supplies.