Technical Specifications Parameter Value Model / Part Number AX370‑30‑11‑84 Poles (Main Contacts) 3‑pole (3 Normally Open) Auxiliary Contacts 1 NO + 1 NC Control (Coil) Voltage (Uc) 110 V AC 50 Hz or 110–120 V AC 60 Hz Rated Main Circuit Voltage Up to 1000 V AC Conventional Free‑air Thermal Current (Ith) 250 A Rated Operational Current AC‑1 (Ie) 600 A @ 690 V (40 °C) 500 A @ 690 V (55 °C) 400 A @ 690 V (70 °C) Rated Operational Current AC‑3 (Ie) 370 A @ 415–440 V / 380–400 V / 220–240 V 315 A @ 500–690 V Rated Operational Power AC‑3 (Pe) 200 kW @ 415–400 V 250 kW @ 500 V 315 kW @ 690 V 110 kW @ 220–240 V Making / Breaking Capacity (AC‑3) Making: 10 × Ie Breaking: 8 × Ie Short‑time Withstand Current (Icw) 1 s → 3700 A; 10 s → 2960 A; 1 min → 1208 A; 15 min → 600 A Rated Insulation Voltage (Ui) 690 V Impulse Withstand Voltage (Uimp) 8 kV Maximum Electrical Switching Frequency 300 cycles/hour Maximum Mechanical Switching Frequency 300 cycles/hour Degree of Protection (Auxiliary Terminals) IP40 Terminal Type (Main Circuit) Bar-type terminals Ambient Air Temperature (with thermal overload relay) –25 °C … +55 °C Ambient Air Temperature (without overload relay / storage) –40 °C … +70 °C