It's rated AC-3 at 6 A up to 440 V, which means it's sized for small three-phase motors (pumps, fans, conveyors) where you need forward/reverse control. The 220…230 VAC coil matches standard control voltages in European panels.
AC-3 at 6 A is the motor-switching rating — that's the one that decides if it handles your load. AC-4 is also listed, covering inching/jogging duty where the contactor breaks stalled-rotor current. The 6 A AC-3 figure is conservative for a reversing contactor this size; it reflects the thermal limits of the compact 57 mm deep × 90 mm wide body. If your motor FLA exceeds 6 A at 440 V, step up to the next TeSys K frame.
The 57 mm depth × 58 mm height × 90 mm width fits standard DIN-rail enclosures; the preassembled busbar saves a few minutes on the rail. Ambient range -25…50 °C covers most control cabinets without derating; storage from -50…80 °C. Operating altitude 2000 m without derating — fine for most sites, but above that you'll need to reduce current.