The Siemens SIRIUS 3RT1015-2AF01-ZX95 is a size S00 power contactor with a 24 VDC coil rated at 10 A, housed in a 45 mm wide body that screws or snaps onto a 35 mm DIN rail per EN 50022. The spring-loaded terminals on the main current circuit accept 2x (0.25 to 2.5 mm²) solid or stranded, which is typical for panel wiring up to this current class.
The 10 A rating at 24 VDC is the continuous current for the main contacts in the DC-12 or resistive load category; for motor loads you'll use the AC-3 values. At 400 V AC-2 duty it's rated at 3 kW, and at AC-4 at 400 V it handles 6.5 A — that's the inching or plugging duty cycle, so if your application does frequent reversing or jogging, size against the AC-4 figure, not the higher AC-3 number. The coil hold-in voltage range is 0.8 to 1.1 times rated at 50 Hz, 0.85 to 1.1 at 60 Hz — below 0.8 the coil drops out, which is standard for this class.