The Schneider Electric LC1F1700W7 is a 3-pole contactor from the TeSys F range, rated for 1700 A conventional free-air thermal current (Ith) at 40 °C and 1700 A operational current in AC-1 utilisation category (resistive loads). For motor starting (AC-3), this contactor would need a different duty rating; the AC-1 rating means it's sized for loads where the current stays near steady-state during switching, not for the inrush of induction motors. The coil is AC-operated at 265-277 V, 40-400 Hz, with an inrush draw of 2200 VA and a hold-in consumption of 36 VA. Operating-time spread is 100-170 ms for opening and 40-75 ms for closing — wide enough that if you're coordinating with a fast upstream breaker, you'll want to verify the timing stack-up in your specific circuit. The control circuit voltage limits are 0.85-1.1 Uc for pick-up and 0.3-0.5 Uc for drop-out at 55 °C, so a marginal supply near the lower bound may cause chatter on a warm panel.
Integration and mounting constraints
Mounting is plate-only — no DIN-rail clip on this frame size. The dimensions are 438 mm wide by 332 mm high by 238.6 mm deep, so it needs a dedicated backplate or sub-panel, not a standard enclosure rail. Power-circuit connections are bolted bar terminations accepting up to 100 x 5 mm busbars; control-circuit connections use screw-clamp terminals accepting 1-4 mm² flexible or solid wire. Tightening torque on the power circuit is 58 N·m — that's substantial; a torque wrench is expected during installation. Heat dissipation is 36 W total, with 200 W per pole in AC-1 duty. That's significant for enclosure thermal management — if you're grouping multiple contactors in a sealed cabinet, the cumulative heat load will drive ventilation or derating decisions. The rated short-time withstand current (Icw) is 10,000 A for 10 seconds at 40 °C, which gives some coordination headroom with upstream fuses or breakers. The associated fuse recommendation is 1600 A gG at ≤ 440 V.
The contactor is certified to IEC 60947-4-1, EN 60947-4-1, UL 60947-4-1, and CSA C22.2 No 60947-4-1, plus JIS C8201-4-1. Rated insulation voltage is 1000 V per IEC/UL 60947-4-1, with an impulse withstand voltage of 8 kV and overvoltage category III. The protective treatment is TH (tropicalized) for humid environments. Operating altitude is 3000 m without derating; ambient temperature range is -5 to 40 °C for operation and -60 to 80 °C for storage.