The Schneider Electric TeSys F CR1F4004G7 is a 4-pole (4 NO) bistable magnetic contactor rated for 400 A at <40 °C in AC-1 utilisation category — that is resistive loads like heaters or lighting banks, not motor starting. The 127 V control circuit (AC 50/60 Hz, AC 400 Hz, or DC) latches and unlatches via a pulsed coil, meaning the contactor holds its state without continuous coil power. Latching pull-in draws up to 1450 VA at 50/60 Hz, while the unlatching pulse is a lower 12 VA; once switched, the coil sits at near-zero steady-state dissipation.
The 400 A rated operational current (Ie) at <40 °C in AC-1 is the headline number — it governs the continuous resistive load this contactor can carry. The conventional free-air thermal current (Ith) is 500 A at 40 °C, giving a 25 % headroom above the operational rating for short-term overloads. Rated breaking capacity reaches 4000 A at 220...440 V and 3000 A at 600...690 V, which tells you it can interrupt fault currents up to those levels without welding contacts — important for panel coordination studies. Making capacity is 4500 A rms, sized for closing onto an already-energised load. Operating time is 40...75 ms latching and 50...100 ms unlatching, so expect roughly two line cycles before the main poles settle.
The CR1F4004G7 occupies 261 mm width by 375 mm height by 219 mm depth on the panel or mounting plate. The 4-pole block is screw-clamp terminated for power wiring up to the associated fuse rating of 400 A aM or 500 A gG/gG. Coil consumption of 1450 VA latching means the control transformer needs to be sized for that inrush; the 0.85...1.1 Uc voltage limits mean the coil will hold latch down to 108 V on a 127 V nominal supply.