The LX1FK075 is a replacement coil for the TeSys LX1F contactor range, wound for 75 V AC 50/60 Hz control circuits. It pulls the main contactor in — that's its whole job, and it does it without a built-in suppressor module, so you'll need to add one externally if the application demands it.
Coil resistance sits at 66.4 Ω holding and 3.7 Ω inrush at 20 °C — that inrush figure tells you the instantaneous current draw when the coil first pulls in, which matters for sizing your control transformer and fuse. The operating time window is 100 to 170 ms for opening and 40 to 75 ms for closing, so don't expect a fast-acting contactor; this is a standard industrial-duty coil, not a high-speed switching device. Rated for 10 Mcycles mechanical durability and a maximum operating rate of 2400 cycles per hour at 55 °C. That rate limit is the real-world constraint: if your application cycles the contactor faster than once every 1.5 seconds, this coil will overheat and fail prematurely. Control voltage limits are 0.85 to 1.1 Uc for operation and 0.3 to 0.5 Uc for drop-out at 55 °C. That 0.3 to 0.5 Uc drop-out window means the contactor will release when the control voltage dips below roughly 22.5 to 37.5 V AC — wide enough to tolerate brownouts but tight enough to avoid nuisance drop-outs on a sagging line.
Sourcing reality — this one is obsolete
If you need a pin-compatible alternative, you'll need to verify the mounting footprint and coil voltage against a current TeSys coil (like the LX1FK series at a different voltage) or a third-party equivalent — but that's a cross-reference exercise, not a guaranteed swap.