Switching duty and mechanical life
The 3RT2024-1AC20-ZW96: Rated for 1,000 operating cycles per hour in AC-1, AC-2, AC-3, and AC-3e duty, dropping to 300 cycles/hour in AC-4 — the heavier the switching load (motor starting vs. inching), the lower the permissible frequency. Mechanical endurance is 10 million operations typical, so this contactor is a fast mover for high-cycle applications like conveyor or pump control where the contactor cycles multiple times per minute. Arcing time is 10 ms at 50/60 Hz — consistent with the S0 frame design; the contactor clears the arc within one half-cycle, which matters for coordination with upstream protection.
Wiring and auxiliary contacts
The coil uses screw-type terminals, and the contactor includes an auxiliary switch with 1 NO + 1 NC configuration (: 16... 8 — likely meaning 1 NC + 1 NO based on Siemens standard numbering).