The CR1F400PF7 is a TeSys F magnetic latching contactor from Schneider Electric — a 3-pole (3 NO) device rated for 400 A operational current and capable of switching a 200 kW motor at 400 V AC under AC-4 duty, the most demanding category for plugging and inching. The magnetic latching mechanism holds the main poles closed without continuous coil power, so the coil only draws current during the latching and unlatching transitions — 1600 VA for 40–75 ms to latch, 16 VA for 50–100 ms to unlatch. The coil accepts dual control voltages — 230 V or 110 V, both AC 50–400 Hz and DC — giving flexibility across different control circuits without changing the contactor. The rated insulation voltage is 1000 V per IEC 60947-4, and the operational voltage goes up to 1000 V AC. It is built for motor control and resistive loads, with utilisation categories AC-3 (squirrel-cage motors: starting, switching off running motors), AC-1 (resistive loads), and AC-4 (plugging, inching, reversing).
The headline 400 A rated operational current (Ie) is the continuous current the main poles carry in free air at ≤40 °C. Under AC-4, that figure drops to 370 A at <40 °C and ≤440 V — the duty cycle matters. The motor power rating of 200 kW at 400 V AC-4 tells you the heaviest motor load this contactor can handle under reversing or inching duty. For AC-3 (normal starting/running), the same contactor handles higher currents, but the evidence does not give that specific figure — the AC-4 number is the conservative bound. The short-time withstand current (Icw) is 3600 A for 1, 5, and 10 seconds at 40 °C — that is the fault current the contactor can carry without welding or damage until an upstream protective device clears. The rated breaking capacity reaches 4000 A at 220–440 V, 3500 A at 500 V, and 3000 A at 660/690 V. Associated fuse ratings are 400 A aM or gG at ≤440 V, or 500 A BS88. These numbers govern coordination with upstream fuses or circuit breakers. Power dissipation per pole runs 45 W under AC-3 and 70 W under AC-1 — relevant for enclosure thermal design. The contactor operates from -15 °C to 70 °C ambient and stores from -60 °C to 80 °C.
Physical integration and connections
The CR1F400PF7 measures 219 mm deep, 213 mm wide, and 206 mm tall — a substantial frame for a 400 A contactor. Power connections are bolted, accepting lugs or ring terminals for up to two 150 mm² cables per pole, or bars with a busbar cross-section of 30 x 5 mm. Tightening torque is 35 N·m. This is a panel-mount device, not DIN-rail; it bolts directly to a backplate or mounting bracket.