It's rated for up to 1000 operating cycles per hour in AC-3 duty (direct-on-line motor switching), and 900 cycles per hour in AC-1 (resistive load) service. The coil pulls 3.5 VA at both 50 and 60 Hz, with a rated control voltage range of 175 to 280 V. Inrush peaks at 65 A, so keep that in mind when sizing your control transformer.
The AC-3 rating of 1000 cycles per hour tells you this contactor is built for frequent motor starting — think conveyors, pumps, compressors that cycle regularly. Wire sizing is straightforward: main power terminals accept stranded cable from 6 to 70 mm², solid from 2.5 to 16 mm². Auxiliary terminals take 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²). That covers most panel-building wire gauges without needing adapters.
The S3 frame is 70 mm wide, 140 mm tall, and 152 mm deep — that's the depth you need to account for behind the panel door or inside the enclosure.