The Siemens 3RT2517-2AP00 is a SIRIUS S00 contactor with spring-type terminals, rated at 10 A for 24 V AC (50/60 Hz) — that's the current it can make and break for a resistive or lightly inductive load at that coil voltage. For higher control voltages the rated current drops: 2 A at 48 V or 60 V, 1 A at 110 V, 0.3 A at 220 V, and down to 0.1 A at 600 V. The mechanical life is rated at 30,000,000 cycles typical, with the electrical endurance depending on the load — AC-1 maximum switching frequency is 1,000 cycles per hour, and the arcing time sits between 10 and 15 ms. That's the interval where the contacts are ionizing; the circuit breaker upstream needs to hold off during that window.
Wiring and integration — spring terminals and conductor sizing
That's enough for the rated current range; for the 10 A at 24 V circuit, 1.5 mm² is typical. No screw torque to verify, no retightening on thermal cycles — the spring maintains contact pressure. Strip length for the spring cage is standard at 8-9 mm; a ferrule helps with fine-stranded wire.