The Schneider Electric CR1F6304EZ7 is a TeSys F magnetic latching contactor — a 4-pole, 4 NO device rated for motor control and resistive loads across AC-1, AC-3, and AC-4 utilisation categories. Its magnetic latching mechanism holds the main poles closed without continuous coil power; the coil draws 620 W DC during the latching pulse and 45 W DC during the unlatching pulse, then drops to zero holding current. This makes it suited for applications where sustained coil power is undesirable or where a contactor must stay closed through a control-power interruption.
For AC-3 (starting/running) the conventional free-air thermal current Ith is 1000 A at 40 °C, which is the thermal limit for the main pole assembly. Motor power spans from 200 kW at 220–230 V up to 450 kW at 690 V and 1000 V AC, 50/60 Hz. The UL/CSA horsepower ratings follow a similar curve: 800 hp at 575–600 V for 3-phase motors. The control circuit is 48 V DC with a latching range of 0.85–1.1 Uc and unlatching range of 0.85–1.1 Uc. Operating time is 40–80 ms latching, 50–100 ms unlatching. The rated insulation voltage Ui is 1000 V per IEC 60947-4 and BS 775, with an impulse withstand Uimp of 8 kV. Short-time withstand Icw is 5050 A for 1 s, tapering to 1600 A for 10 min — this defines how long the contactor can carry fault current while a breaker clears.
This is a large-frame contactor — 15.3 in wide, 12.0 in tall, 10.04 in deep — designed for bolted bus-bar connection via two 60 x 5 mm bars per pole. The tightening torque on the main connections is 513.3 lbf·in (58 N·m). It is not a DIN-rail snap-on device; it mounts on a backplate or chassis, and the bus-bar interface means it integrates into a switchboard or motor control centre lineup. The associated fuse rating is 630 A aM or gG at ≤440 V, or BS88 at 1000 A — use that as the starting point for coordination studies.