Rated AC-3 at 16 A up to 440 V, it handles the forward/reverse switching on a motor load within that current envelope. The coil pulls in on 48 V AC, which is a common control voltage in older panel designs and some rail applications.
AC-3 is the utilisation category for squirrel-cage motors: starting, switching off during running, and plugging/reversing. The 16 A rating at <=440 V AC means this contactor is sized for a motor drawing up to roughly 16 A in that duty — typically a 5.5 to 7.5 kW motor at 400 V, depending on the motor's full-load current. The 48 V AC coil is a specific control voltage — not the common 24 V DC or 230 V AC found in most modern panels. That's the first thing to verify against the existing control transformer or PLC output card. Coil draw at 48 V AC is modest, but the inrush can be several times the sealed VA; the control transformer needs to handle that peak without dropping voltage below the contactor's pick-up threshold.
The 57 mm depth and 90 mm width fit a standard DIN-rail footprint, but the preassembled reversing busbar adds a fixed width; check the available rail space before committing the panel layout. Altitude rating to 2000 m without derating handles the majority of installations.