What this coil is
The LX1FK280 is a TeSys F contactor coil — a replacement coil for the TeSys F contactor range, designed to be swapped into the contactor frame. It operates on a 265...277 V AC control circuit at 40...400 Hz. This coil draws 1100 VA inrush at 68 °F (20 °C) and settles to 18 VA holding power. The inrush resistance is 56.5 Ω; the holding resistance is 1490 Ω. Heat dissipation runs 18 W across the 40...400 Hz range. Opening time is 100...170 ms; closing time is 40...75 ms.
Sourcing reality — obsolete
Verify the control voltage and mounting footprint against the existing contactor frame before committing.
Coil voltage and control circuit notes
The control circuit is AC only, 40...400 Hz. Operational voltage range is 0.85...1.1 Uc at 131 °F (55 °C). Drop-out occurs at 0.3...0.5 Uc. This coil has no built-in suppressor module. If the contactor frame or panel design expects a built-in varistor or RC snubber, an external suppressor must be added across the coil terminals to protect the control circuit from switching transients. The closed-circuit inductance is 7.3 H, which matters for sizing external suppression components — a higher inductance slows current decay and increases the voltage spike on opening.
Ambient operating temperature range is 23...131 °F (-5...55 °C). The coil mounts into the TeSys F contactor frame — no DIN-rail or panel footprint of its own; it is a drop-in replacement part for the contactor assembly.