The LX1FF850 is a replacement coil for the TeSys F contactor range, not a complete contactor — it's the magnetic actuator that pulls the main poles in. Control circuit is 1000 V AC 60 Hz, so this is for a 60 Hz panel (not 50 Hz line voltage). Closing time runs 23...35 ms, opening 5...15 ms, which puts it in the standard range for F-frame contactors.
Coil holds in at 0.85...1.1 Uc and drops out at 0.35...0.55 Uc — that dropout margin means the contactor releases cleanly on a sag down to 350 V AC (on a 1000 V nominal line), which is generous for brownout ride-through. No built-in suppressor module, so you'll need an external RC snubber or varistor across the coil if driving it from a PLC output or solid-state relay; the coil's inductance of 48.9 H will generate a healthy kickback spike without one.