Motor switching in a size S00 frame
The Siemens 3RT2317-1AP60 is a SIRIUS contactor in the size S00 frame, rated 5.5 kW at AC-3 400 V — that's the motor switching duty for a 7.5 hp pump or fan at 400 V line. The 12 A rated current at 400 V is the continuous thermal current the main poles carry; the AC-3 rating is the real-world figure for starting and stopping a squirrel-cage motor under load. The 220 V AC coil is standard for North American 240 V control circuits stepped down through a control transformer.
Screw terminals on both main and coil circuits — the main circuit accepts 2x 4 mm² solid or stranded, the coil terminals 2x 1.5 mm² solid.