The CR1F4004F7 is a TeSys F magnetic latching contactor from Schneider Electric, configured with 4 normally-open power poles and rated for 400 A in AC-4 duty at 40 °C on a 440 V supply. The magnetic latching mechanism holds the contacts closed without continuous coil power — the coil draws 1600 VA during the latching pulse and only 16 VA to unlatch, so it's suited for applications where sustained coil hold-in current is undesirable or where a power loss must not drop the load out. Rated operational voltage goes to 1000 V AC, and the utilisation categories cover AC-1 (resistive), AC-3 (motor starting/running), and AC-4 (plugging/inching). Control circuit voltage is 110 V AC 50...400 Hz or 110 V DC.
The 400 A AC-4 rating is the headline figure — this contactor is built for severe switching duty where the motor is reversed or jogged under load, not just started and run. AC-4 imposes higher arcing stress than AC-3, so the 400 A AC-4 rating means it can handle a 400 A motor load in that demanding cycle. For comparison, the same contactor is rated higher in AC-1 (resistive) and AC-3 (standard motor) duty, but the AC-4 number is the one that governs in harsh reversing applications. The rated breaking capacity reaches 4000 A at 220...440 V, and the making capacity is 4500 A — both confirm it can interrupt and close onto fault currents without welding. The short-time withstand current (Icw) is 3600 A for 1 second at 40 °C, giving coordination margin with upstream protection.
The contactor measures 8.6 in deep by 10.3 in wide by 8.1 in tall — a substantial footprint that requires panel space and bolted connections. Power circuit terminals accept lugs or ring terminals up to 150 mm², or bars 30 x 5 mm, with a tightening torque of 35 N.m (309.8 lbf.in). The coil is AC/DC compatible (110 V) and draws a 1600 VA pulse to latch, then 16 VA to unlatch — the control circuit must be sized for that inrush. The mechanical durability is rated at 1 million cycles, so it is built for a long service life in a fixed installation.