Technical Parameters Parameter / Feature Specification / Detail Model / Type AF300‑30‑11 (3‑pole contactor) Main Contacts (Power Poles) 3 × Normally‑Open (3NO) Auxiliary Contacts 1 × Normally‑Open (NO) + 1 × Normally‑Closed (NC) Rated Main-Circuit Voltage (Ue) Up to 690 V AC (nominal industrial supply) Rated Frequency (Main Circuit) 50 / 60 Hz Conventional Free‑air Thermal Current (Ith) 500 A (at 40 °C, free‑air) Rated Operational Current – AC‑1 (Ie, general load) 500 A @ 690 V (at 40 °C) Derated: 400 A @ 55 °C, 325 A @ 70 °C Rated Operational Current – AC‑3 (Ie, motor load) ~ 300 A @ 415 V (at 55 °C) ~ 280 A @ 440–500 V ~ 280 A @ 690 V (at 55 °C) Rated Motor / Load Power – AC‑3 (Pe) • ~ 90 kW @ 220–240 V • ~ 160 kW @ 380–415 V • ~ 200 kW @ 500 V • ~ 250 kW @ 690 V Making / Breaking Capacity – AC‑3 Making: 10 × Ie; Breaking: 8 × Ie Short-Time Withstand / Inrush Current (Icw) Example: 2400 A for 10 s (cold state) Control (Coil) Voltage Wide-range coil variants: 100–250 V AC / DC (50/60 Hz), or other Uc per ordering code Insulation / Withstand Ratings Insulation voltage Ui ~1000 V; Impulse withstand voltage Uimp ~8 kV Terminals / Connections Main circuit: bar/bus‑bar type terminals (for heavy cables or busbars) Auxiliary: screw-type terminals Mechanical / Electrical Endurance High endurance for heavy-duty switching; suitable for frequent operation cycles Typical Applications Three-phase motor start/stop, industrial machinery control, heavy load switching, power distribution panels, motor‑control centres, large AC load switching.