The LC1F2100F7 is a 3-pole TeSys F contactor rated for 2100 A conventional free-air thermal current (Ith) and 2100 A operational current in AC-1 utilisation category — meaning it is sized for resistive heating loads, not motor starting. AC-1 duty covers loads where the current waveform stays nearly sinusoidal with no significant inrush, such as large electric furnaces, banked heaters, or power-factor correction capacitor banks. The 110 V AC control circuit (40-400 Hz) draws 2200 VA inrush and holds at 36 VA; dropout occurs between 0.3 and 0.5 Uc, so the coil reliably releases below about 55 V AC. Rated breaking capacity is 3150 A per IEC 60947-4-1, and the short-time withstand current (Icw) reaches 10 kA for 10 seconds — enough to coordinate with upstream 2000 A gG fuses at ≤ 440 V without nuisance opening during a downstream fault. The contactor carries overvoltage category III and an impulse withstand voltage of 8 kV, so it suits fixed-installation distribution panels where transient overvoltages from the mains are expected.
The contactor is certified to IEC 60947-4-1, EN 60947-1, EN 60947-4-1, JIS C8201-4-1, UL 60947-4-1, and CSA C22.2 No 60947-4-1. Rated insulation voltage is 1000 V per IEC 60947-4-1 and 1500 V per VDE 0110 group C. The protective treatment (TH) indicates suitability for tropical/humid environments. Operating altitude reaches 3000 m without derating.
Mounts on a plate (not DIN rail) — the 438 mm width and 332 mm height require a dedicated backplate in the enclosure. Power connections use bolted bars accepting up to 100 x 5 mm busbars; control circuit connections are screw-clamp terminals accepting 1…4 mm² flexible or solid wire. Tightening torque is 58 N.m on the power circuit and 1.2 N.m on the control circuit. Heat dissipation is 36 W total (200 W per pole in AC-1), so forced ventilation or derating may be needed in a sealed cabinet above 40 °C ambient.