The LX9FJ912 is a specific contactor coil from the Schneider TeSys F range, designed as the replaceable magnetic coil for TeSys F contactors. It operates the contactor's armature — 60 ms to open, 20 ms to close — which governs how fast the main poles make or break the load circuit. The control circuit accepts either 24 V DC or 27...29 V AC at 40...400 Hz, making it flexible for panels with mixed control voltages. Inrush power hits 500 VA at 20 °C; holding power drops to 23 VA once the armature seals. Heat dissipation runs 11.4 to 13.9 W, so the coil contributes noticeable thermal load inside the enclosure — factor that into cabinet sizing if multiple contactors are ganged. The coil lacks a built-in suppressor module, so you'll need an external RC snubber or varistor across the coil terminals if driving it from a PLC output or electronic timer.
This coil mounts directly onto the TeSys F contactor's magnet assembly — it is the replaceable element, not the full contactor. The control circuit voltage limits are 0.85...1.1 Uc for pickup at 55 °C, and dropout occurs between 0.3 and 0.5 Uc at the same temperature — useful to know when verifying hold-in on a brownout or long control-wire run.