The Schneider Electric LC1F1400RD is a 3-pole contactor from the TeSys F range, rated 1400 A conventional free-air thermal current (Ith) at 40 °C and 1400 A operational current in AC-1 utilisation category — meaning it's built for resistive loads like large heating banks or furnace elements, not motor starting (that would be AC-3). Control is via a 440 VDC coil with a 0.85–1.1 Uc pick-up range and a drop-out band of 0.3–0.5 Uc at 55 °C. It's a plate-mount unit, 332 mm tall, 438 mm wide, 238.6 mm deep — sized for a 100 x 5 mm busbar connection on the power side.
The 1400 A AC-1 rating is the headline number — it governs resistive load switching. The short-time withstand (Icw) profile tells you how long it can ride through a fault: 8000 A for 10 s, 6000 A for 30 s, 4500 A for 1 min, stepping down to 2600 A for 10 min. That's the curve for coordination with upstream protective devices. The associated fuse recommendation is 1600 A gG at ≤ 440 V. Heat dissipation runs 10 W holding, 150 W per pole under AC-1 load. Closing time is 50–60 ms, opening 45–60 ms.
Certified to IEC 60947-4-1, EN 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, and JIS C8201-4-1. Rated insulation voltage 1000 V per IEC/UL, 1500 V per VDE 0110 group C. Impulse withstand voltage 8 kV, overvoltage category III. Protective treatment TH for tropical environments. Operating altitude 3000 m without derating.