The LX0FH012 is a replacement or spare contactor coil for the TeSys F range, designed to bolt into the contactor frame and energize the main poles. The latching type holds position magnetically when energized; unlatching takes 45–50 ms, and full unlatching (drop-out) runs 50–100 ms — fast enough for most motor-start and isolation sequences.
Key electrical and mechanical ratings
Coil resistance is 104.8 Ohm at 68 °F (20 °C) in the latching state, and 6622 Ohm in the unlatching state — the high unlatching resistance means the coil driver sees a much lower holding current once the contactor is sealed, which reduces heat in the panel. The control circuit voltage limits are 0.85 to 1.1 times Uc for both latching and unlatching, so on a 440 V nominal circuit the coil stays pulled in down to about 374 V and releases reliably up to 484 V.