The Schneider Electric LC1F1700F7 is a 3-pole TeSys F contactor rated for 1700 A in AC-1 utilisation category (resistive load) at 40 °C, with a 110 V AC control coil operating at 40–400 Hz. This is a heavy-duty, plate-mounted contactor sized for large resistive heating banks, furnace control, or high-current distribution switching — not a motor-starting contactor (that would be an AC-3 rated device).
The 1700 A AC-1 rating governs continuous resistive current. The contactor dissipates 36 W total (200 W per pole in AC-1 duty), so panel ventilation or forced cooling may be needed if enclosed with other high-heat devices. For short-circuit coordination, the associated fuse is 1600 A gG at ≤ 440 V; the contactor itself can withstand 10,000 A for 10 seconds (Icw). The control coil draws 2200 VA inrush and 36 VA holding at 20 °C; the drop-out voltage is 0.3–0.5 Uc (33–55 V for a 110 V coil), so verify your control supply stays above 85% of Uc during dips. Operating time is 100–170 ms opening, 40–75 ms closing — not a fast-switching device, but adequate for resistive load cycling at up to 600 cycles per hour at 55 °C.
Standards & Approvals
The LC1F1700F7 carries certification to EN 60947-1, IEC 60947-4-1, JIS C8201-4-1, UL 60947-4-1, and CSA C22.2 No 60947-4-1. The rated insulation voltage is 1000 V per IEC/UL 60947-4-1, with an impulse withstand voltage of 8 kV (overvoltage category III). The protective treatment is TH (tropicalized) for humid environments. These approvals mean the contactor is accepted in European, North American, and Japanese installations — no separate regional variant needed.