The Siemens SIRIUS 3RT2317-2AP60 is a size S00 contactor rated for 5.5 kW at 400 V in AC-3 duty — the standard motor-switching category for squirrel-cage induction motors. That 5.5 kW rating at 400 V tells you the motor load it can handle under normal starting and running conditions. The 12 A rated operational current at 400 V is the thermal limit for the main poles in that duty.
Both the main current circuit and the magnet coil use spring-loaded (spring-type) terminals. The main contacts accept solid conductors 2x (0.5 to 2.5 mm²) or stranded 0.5 to 4 mm². Auxiliary contacts use the same spring-cage style, sized for 2x (0.5 to 2.5 mm²) solid. No screw torque to verify — just strip and insert.
Relative humidity minimum 10%. RoHS compliance date is October 1, 2009, covering the EU RoHS substance restrictions.