The LX1FF030 is a replacement contactor coil from the TeSys F range, designed to drop into the corresponding TeSys F contactor frame when the original coil fails or a voltage change is needed. It's an AC-operated coil, rated for 30 V AC at 50 Hz and 36 V AC at 60 Hz — so if you're swapping a coil on a line running 50 Hz, you're feeding it 30 V; on a 60 Hz line, it's 36 V. The coil pulls in at 85–110% of rated control voltage and drops out between 35–55% of Uc, which is a wide enough band to handle a saggy control transformer without nuisance dropouts.
Closing time runs 23 to 35 ms, opening between 5 and 15 ms — fast enough for most motor starting and general switching duty, but not a high-speed DC switching coil. The inrush power hits 550 VA at 50 Hz (650 VA at 60 Hz), and hold-in drops to 45 VA (55 VA at 60 Hz). That inrush matters for sizing your control transformer: a single coil this size won't stress a typical 100 VA transformer, but if you're ganging several contactors on one transformer, add up the inrush numbers. Heat dissipation runs 12 to 16 W at 50 Hz, so panel ventilation around a densely packed row of these coils is worth a thought.