The LX1FK350 is a replacement coil for Schneider TeSys LX1F contactors, rated 350 V AC 50/60 Hz. It's the part that pulls the contactor in — no built-in suppressor module, so you supply your own RC snubber or varistor across the coil terminals if the application needs one. Coil resistance tells you the draw: 89.6 Ω inrush at 68 °F (20 °C) drops to 2410 Ω holding at the same temperature. That inrush-to-hold ratio is typical for AC-operated contactor coils — the high initial current slams the armature home, then the holding current drops to a fraction of that. Operating window is 100...170 ms opening, 40...75 ms closing. That's the mechanical travel time; add the control system's scan or relay delay when timing a safety circuit.
Voltage tolerance and dropout behaviour
Control circuit voltage limits are 0.85...1.1 Uc for operation at 131 °F (55 °C), meaning the coil must see between about 298 V and 385 V to pull in reliably. Dropout happens between 0.3 and 0.5 Uc — roughly 105 V to 175 V — so the contactor drops out cleanly on a brownout without chattering.
Listed as Active by Schneider. This is a current-production coil, not a last-time-buy or NRND part.
Durability and rate limits
Rated for 10 Mcycles mechanical — that's the coil and contactor mechanism together, not just the coil. Maximum operating rate is 2400 cycles per hour at 131 °F (55 °C), which works out to one operation every 1.5 seconds. Keep the ambient within -5...55 °C for rated life.