The Siemens SIRIUS 3RT1317-2AK60 is a Size S00 power contactor with four normally-open main contacts, rated for 5.5 kW at 400 V in AC-2 duty (slip-ring motor switching). The spring-loaded terminals accept 2x (0.25 to 2.5 mm²) solid or stranded copper, which matches the standard control-panel wiring practice for this frame size.
The 4 NO main contact arrangement means this contactor switches the line supply only; there are no built-in NC poles for a holding circuit, so an external auxiliary contact block (or a separate control relay) is needed for three-wire start/stop logic. The coil draws at 50 Hz (0.85 to 1.1 A) and at 60 Hz (0.8 to 1.1 A) — these are the holding currents, not the inrush peak.
The 45 mm width and 72 mm depth fit the standard S00 footprint. Side-by-side mounting is permitted (zero spacing between contactors), which saves rail space in multi-contactor groups. The spring-loaded terminals eliminate the need for screwdriver torque checks on the main circuit wiring — strip length is 8 mm for the 0.25 to 2.5 mm² range. The auxiliary contact terminals share the same spring-cage design, so the same wiring practice applies across the device.