The LX0FF224 is a TeSys F contactor coil — the replaceable solenoid that pulls in and holds the main power contacts on a TeSys F frame contactor. It is a dual-voltage design: the latching circuit operates at 220 V AC/DC while the unlatching (hold-in) circuit runs at 24 V AC/DC, which means the coil draws high inrush to close the contacts then drops to a lower hold-in voltage, reducing continuous power dissipation in the panel. Operating time is 35 to 40 ms for latching (closing) and 50 to 100 ms for unlatching (opening), so the contactor responds fast enough for motor starting and general switching duty but not for high-speed semiconductor switching.
Control circuit and integration notes
The control circuit accepts AC at 50 to 400 Hz or DC, standard for industrial panels where a 220 V control transformer feeds the latching circuit and a separate 24 V supply handles the hold-in. The coil resistance measures 29.5 Ω for the latching winding and 39.5 Ω for the unlatching winding at 20 °C — useful for calculating inrush current and verifying the control transformer sizing. Voltage tolerance is 0.85 to 1.1 times the rated control voltage on both circuits, so a 220 V latching supply can sag to 187 V and still pull the contactor in. Mounts directly onto the TeSys F contactor base; no additional wiring adapter needed. The coil terminals accept standard ring or fork crimp terminals. Panel builders should verify the control transformer VA rating covers the latching inrush — the 29.5 Ω resistance at 220 V implies roughly 7.5 A peak inrush, though the hold-in current at 24 V is under 1 A.