The Siemens SIRIUS 3RT1016-1AB01-ZW97 is a size S00 power contactor with a 24 V AC 50/60 Hz coil, rated for 10 A at 24 V. It's a current-production part, so no last-time-buy scramble — this one's still in the catalog for new builds and MRO spares alike.
The 24 V AC coil is the key spec — this is a standard control voltage for many panel designs, and the 50/60 Hz dual rating means it works on either mains frequency without a coil swap. The 10 A rating at 24 V is the AC-12 maximum operating current for the main contacts, so it handles resistive loads at that voltage cleanly. For motor duty, the AC-2 rating at 400 V is 4 kW, and AC-4 at 400 V is 8.5 A — that's the heavy switching category for plugging and inching. The 690 V rating at 5.5 kW tells you it can handle higher-voltage motor circuits within the S00 frame size.
Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, with a max of 2x (0.75 to 4 mm²). Side-by-side mounting is allowed with a 6 mm gap at the side for heat dissipation.