The Siemens 3RT1017-1AB04-0AA1-ZW97 is a 3-pole SIRIUS contactor rated for AC-3 duty at 5 kW at 400 V, with a 24 V AC 50 Hz coil. The built-in varistor handles coil suppression, so you don't need an external snubber on the 24 V AC line.
The 24 V AC coil is common in control transformers; verify your control voltage is AC, not DC, because the built-in varistor is polarity-sensitive for AC only. The 2NO + 2NC auxiliary contact block gives you feedback and interlock capacity without an add-on module.
Deployment context
Snap-on mounting to a DIN rail in a standard enclosure; the S0 module width fits alongside other SIRIUS components without wasted panel space. The multiunit packing of 27 items is a bulk lot — useful for a line build or a panel shop running multiple identical starters.