The Siemens 3RT1017-1AK61-ZW97 is a 3-pole contactor in the SIRIUS series, size S00, with screw terminals. Its AC-3 rating of 5.5 kW at 400 V means it is sized for switching three-phase induction motors up to that power — common for small pumps, fans, and conveyors in a control panel. The coil is wound for AC 110 V at 50 Hz and 120 V at 60 Hz, so it drops straight into a standard North American or European control-voltage circuit without a transformer tap change.
Screw terminals accept up to 4 mm² conductors; strip length is 8 mm. The multi-unit packing (42 pieces, 2x1 layers) is aimed at panel builders who burn through these in quantity; each unit is individually boxed within the layer pack.