What this reversing contactor is and what the AC-3 rating means for your motor circuit
Its AC-3 rating of 6 A at up to 440 V means it switches three-phase squirrel-cage motors on and off under full load, not just after the motor stops. That 6 A figure is the real-world motor-switching current, not a resistive-heater rating; size your motor FLA at or below 6 A in AC-3 duty. The 120 V AC coil is the control voltage — common in North American panel builds where control transformers step down from 480 V to 120 V. Coil draw is modest enough that a standard 120 V control relay can pilot it without an intermediate interposing relay.
Panel integration and mechanical fit
At 57 mm deep, 90 mm wide, and 58 mm tall, this reversing contactor fits a standard DIN-rail footprint. The IP20 finger-safe enclosure (per VDE 0106) means it can live in an open panel without shock-hazard guards — standard for control cabinets. Preassembled with the reversing busbar, you skip the fiddly busbar alignment step during build. Rated for vibration at 4 Gn closed and 2 Gn open (5–300 Hz), and shock up to 15 Gn on Y/Z axes closed, this contactor holds in on a machine tool or conveyor line that sees regular jolts.