Part identification and key specs
The LX0FL055 is a 48 V DC low-consumption contactor coil from the Schneider Electric TeSys F range — the replacement coil for TeSys F contactors that use this control voltage. It operates with a latching time of 50 to 100 ms and an unlatching time of 40 to 80 ms, so the contactor responds within a predictable window for control logic timing. Coil resistance measures 3.94 Ω for the latching winding and 59.17 Ω for the unlatching winding at 68 °F (20 °C) — these values let you verify the coil is healthy with a simple ohmmeter before installation. Rated for a maximum operating rate of 120 cycles per hour at 104 °F (40 °C), which suits it for moderate-duty switching applications like conveyor or pump control.
The 48 V DC control circuit voltage (Uc) with a tolerance band of 0.85 to 1.1 Uc means the coil reliably latches between roughly 40.8 V and 52.8 V DC, and unlatches in the same range. If your control supply sags below 40.8 V, the contactor may drop out unexpectedly — factor that into your DC power supply sizing. Mechanical durability of 1 million cycles gives a baseline service life under ideal conditions. In practice, switching frequency, ambient temperature, and load type all derate that number — the 120 cycles/hour limit at 104 °F (40 °C) is the thermal constraint to watch.