Technical Parameters Parameter / Feature Specification / Detail Model / Type AX370‑30‑11‑80 (3‑pole contactor) Main Contacts / Poles 3 poles — 3 × Normally‑Open (NO) main contacts Auxiliary Contacts 1 × Normally‑Open (NO) + 1 × Normally‑Closed (NC) auxiliary contact block Control (Coil) Voltage 220–230 V AC (50 Hz) or 230–240 V AC (60 Hz) Rated Operational Voltage (Main Circuit) Up to 1000 V AC (insulation rating) / nominal use up to 690 V AC AC‑1 Rated Operational Current (Ie) 600 A @ 690 V (at 40 °C ambient) 500 A @ 690 V (at 55 °C) 400 A @ 690 V (at 70 °C) AC‑3 Motor Duty Current (Ie) 370 A @ 380–440 V (55 °C) 315 A @ 500–690 V (55 °C) AC‑3 Rated Motor Power (Pe) ~ 200 kW at 415–440 V ~ 250 kW at 500 V ~ 315 kW at 690 V Short‑time Withstand / Inrush Current (Icw) – 2960 A for 10 s (from cold) – 3700 A for 1 s (cold state) Other short‑time ratings per spec sheet Making / Breaking Capacity (AC‑3) Making: 10 × Ie; Breaking: 8 × Ie Rated Insulation Voltage (Ui) 690 V (according to IEC 60947‑4‑1) Impulse Withstand Voltage (Uimp) 8 kV Frame / Design Block‑type 3‑pole contactor with built‑in auxiliary contact block Terminals / Connection Type Main circuit: bar / busbar‑type terminals (heavy‑duty) Auxiliary circuit: screw‑terminals Mechanical Endurance ~ 5 million mechanical operations Max Switching Frequency Up to 300 switching cycles/hour (electrical/mechanical) Ambient / Operating Conditions With thermal overload relay: –25 °C … +55 °C; Without overload relay: –40 °C … +70 °C Suitable up to 3000 m altitude without derating Typical Applications Large 3‑phase motor start/stop, heavy‑load switching, industrial machinery, power distribution panels, motor‑control centres, large AC load control