It's a 3-pole unit rated for AC-3 motor switching at 16 A up to 440 V, with a 48 V AC coil. That AC-3 rating means it's designed to switch a motor on and off under load, including reversing, without welding the contacts shut on the inrush.
This reversing contactor is built for motor control panels — it handles the forward/reverse function for conveyors, pumps, fans, and similar three-phase motor loads. Dimensions are 90 mm wide by 58 mm high by 57 mm deep, which is a compact footprint for a reversing pair — fits on standard DIN rail without crowding the next device.
It also carries an AC-4 rating, which covers plugging and inching (reversing while the motor is still spinning), a tougher duty cycle. The 48 V AC coil is common in control circuits where a separate control transformer steps down from the line voltage.