Technical Parameters Parameter / Feature Specification / Detail Model A145‑30‑11 (ABB A‑line) Number of Poles (Main Contacts) 3 (3‑pole) Main Contact Configuration 3 × NO (normally‑open) main contacts Auxiliary Contacts 1 NO + 1 NC (auxiliary / control contacts) Conventional Free‑air Thermal Current (Ith) 250 A (at 40 °C free‑air) Rated Operational Current (AC‑1, Ie) 250 A (at 690 V AC, 40 °C) Rated Operational Current (AC‑3, Ie) ~ 145 A (at 400–415 V AC, 55 °C) Rated Operational Voltage (Main Circuit) Up to 690 V AC (some variants spec up to 1000 V) Rated Operational Power (AC‑3) / Motor Load Capacity - 45 kW at 220–240 V AC - 75 kW at 380–415 V AC - 110 kW at 500–690 V AC (approximate, depending on supply and load) Coil Voltage (Control) AC‑operated, various coil‑voltage variants available (e.g. 220–230 V AC for many versions) Standards IEC 60947‑4‑1 / EN 60947‑4‑1 compliant (standard for motor‑control contactors) Auxiliary / Control Options Compatible with auxiliary contact blocks / accessories (side‑ or top‑mount) for extended functionality Typical Applications Three‑phase motor control (start/stop), contactor switching, load distribution, motor bypass/isolation, HVAC, pumps, compressors, general industrial loads