The CR1F185FZ7 is a 3-pole magnetic latching contactor from the Schneider Electric TeSys F range, designed for control applications switching resistive and motor loads. The 110 V DC low-consumption coil draws 500 W to latch and 20 W to unlatch, with operating times of 35...40 ms latching and 50...100 ms unlatching. Rated operational voltage is 1000 V AC at 25...200 Hz, with a rated insulation voltage of 1000 V per IEC 60947-4 and BS 775. The utilisation categories cover AC-1 (resistive), AC-3 (motor starting/running), and AC-4 (plugging/inching) — so it handles the full range of contactor duty cycles. Motor power ratings span 55 kW at 220...230 V up to 110 kW at 690 V AC, and UL/CSA horsepower ratings go from 50 hp at 200...208 V to 150 hp at 575...600 V.
The AC-1 rating (275 A Ith) is higher because resistive loads don't produce the same inrush. The magnetic latching mechanism holds the contacts closed without continuous coil power — the 500 W pulse latches it, then the coil drops to zero hold current. That makes it suitable for applications where a sustained coil draw is undesirable (battery-backed systems, low-energy designs). The unlatching pulse is only 20 W, so the total energy per cycle is modest. Rated short-time withstand current (Icw) is 1500 A for up to 10 seconds, dropping to 400 A at 10 minutes — this defines how long the contactor can carry a fault current before the upstream protection must open. The associated fuse recommendation is 200 A aM or 315 A gG at ≤ 440 V, which coordinates with the contactor's breaking capacity.
The contactor measures 7.1 in deep, 6.6 in wide, and 6.9 in tall — sized for panel mounting with lug-ring terminals accepting up to 150 mm² cable or two 25 x 3 mm bars. Tightening torque is 159.3 lbf·in (18 N·m) on the power connections. The TH protective treatment means it's tropicalized for humid environments. Maximum operating rate is 120 cycles per hour at 40 °C. It can be used up to 3000 m altitude without derating. Mechanical durability is rated at 1 million cycles.