TeSys F LC1F400W7 — 500 A AC-3 Contactor, End-of-Life Sourcing
The Schneider Electric LC1F400W7 is a 3-pole TeSys F contactor rated for 500 A in AC-3 duty (motor switching) at ≤ 440 V, with a corresponding motor power of 200 kW at 380...400 V AC. The coil is wound for 265...277 V AC at 40...400 Hz. This is a heavy-duty, plate-mounted contactor sized for large motor loads — think 200+ kW pumps, compressors, or conveyors on 400 V three-phase lines. The utilisation category is AC-1 (resistive) and AC-3 (motor), so it handles both general switching and across-the-line starting of squirrel-cage motors. The rated breaking capacity is 3200 A per IEC 60947-4-1, meaning it can safely interrupt locked-rotor currents without welding the main poles.
If you need a form-fit-function replacement, the closest active TeSys F variant with similar AC-3 current and coil voltage should be evaluated — but the exact pin-for-pin substitute is not documented here. A cross-reference check against the panel's existing wiring and mounting footprint is recommended before committing a replacement.
At 400 V, that translates to 200 kW motor power; at 690 V, the same contactor handles 280 kW. The AC-1 rating (resistive load) is not separately stated but the 500 A Ith (thermal current) at 50 Hz with 0.26 mOhm impedance gives a heat dissipation of 14 W total, or 65 W per pole in AC-1 and 42 W per pole in AC-3. That matters for enclosure sizing — 14 W is modest for a contactor this size, but the per-pole dissipation in continuous AC-1 duty adds up in a sealed panel. The control circuit is AC only, 265...277 V at 40...400 Hz. Pull-in inrush is 750 W / 1075 VA at 20 °C; holding power drops to 5 W / 15 VA. The drop-out voltage range is 0.3...0.5 Uc, so the coil releases reliably between about 80 and 140 V. That is a wide dropout band — good for brownout ride-through on the control transformer.
Mounting is plate-only — no DIN-rail clip on this frame size. The dimensions are 213 mm wide × 206 mm high × 219 mm deep. Power circuit connections accept bar (30 × 5 mm busbar) or ring-lug terminals for up to 2 × 150 mm² cable. Control circuit wiring uses screw-clamp terminals accepting 1...4 mm² flexible or solid. Tightening torque is 35 N·m on the power side, 1.2 N·m on the control side. The front face is IP20 with shrouds fitted, per IEC 60529 and VDE 0106 — finger-safe but not washdown-rated. Protective treatment is TH (tropicalised) for humid environments.
Standards & Approvals
Rated insulation voltage is 1000 V per IEC 60947-4-1 and 1500 V per VDE 0110 group C. Associated fuse protection: 400 A aM or 500 A gG at ≤ 440 V.