The LX4FG045 is a replacement contactor coil from the Schneider Electric TeSys range, designed for DC wide-range control circuits at 45 V DC nominal. It's the service part that mates with the FG-series contactor armature — not a standalone contactor, just the coil assembly you swap when the old one opens or the winding goes open-circuit. Closing time runs 30 to 40 ms, opening 30 to 50 ms. The coil draws a 2.52 Ω inrush at 20 °C, then settles to 557.8 Ω holding — that's a DC wide-range design that pulls in hard and holds on low power, which is typical for TeSys FG contactors in panel applications where you want consistent pick-up across a sagging bus. Operational voltage window is 0.85 to 1.1 times Uc at 55 °C, meaning it reliably picks up at about 38 V DC and stays sealed up to 49.5 V DC. Drop-out range is 0.15 to 0.2 Uc — roughly 6.75 to 9 V DC — so it drops cleanly on a control-power loss without chattering.
What that means for a BOM line: if this coil is on your panel's spare-parts list or a legacy machine's bill of materials, the only practical sourcing path is through surplus or broker channels. We can quote it against an RFQ — condition is everything on these, and we'll tell you what we find (new-in-box sealed surplus is the ideal; used pulls are a different conversation). No built-in suppressor module on this coil, so if your control circuit relies on a free-wheeling diode or varistor, it's external — verify the existing panel wiring includes one before you swap, or the back-EMF from the coil collapse can take out a PLC output or a 24 VDC supply.