The LC1E300F7: Rated making capacity is 3000 A at 440 V AC; rated breaking capacity is 2400 A at the same voltage. These figures, certified to IEC 60947-4-1, tell you the contactor can close into and interrupt fault currents well above its continuous rating — essential for coordinating with upstream fuses or MCCB. Associated fuse recommendation is 500 A gG at ≤ 690 V for type 1 coordination.
Durability and operating limits in continuous use
Mechanical durability is 5 million cycles; electrical durability is 500,000 cycles in AC-3 and 400,000 in AC-1. Maximum operating rate is 1200 cycles per hour at 55 °C — that is one close-open every 3 seconds, which covers high-duty applications like conveyor indexing or compressor cycling. Operating altitude is 3000 m without derating, and the contactor meets pollution degree 3 (conductive pollution typical in industrial enclosures).