It's a 3-pole electromechanical starter rated 2 A at AC-3 400 V, with bimetal motor protection and a CLASS 10 trip curve.
The 2 A at AC-3 400 V rating governs the motor-switching capability — AC-3 is the standard duty category for starting squirrel-cage induction motors and disconnecting them while running. For a 400 V line, 2 A AC-3 translates to roughly 1.1 kW motor load (standard 3-phase induction motor).
Mounting and environment — built for the nacelle or the washdown zone
The IP55 rating means dust-protected and protected against water jets — this starter survives hose-down cleaning and condensation common in food processing, wastewater, or turbine nacelles. Ambient range of -25 to +35 °C covers unheated enclosures in temperate climates, but if your enclosure runs above 35 °C, you'll need to derate or force ventilation.