The LX4FG350 is a 350 V DC wide-range contactor coil from the TeSys FG series, designed as a service part for TeSys contactors that take an FG coil platform. It's the replacement coil when the original fails or when a control circuit change requires a 350 V DC nominal. Coil technology is straightforward — no built-in suppressor module, so you'll need to add flyback suppression externally if the driving circuit doesn't already provide it. The 350 V DC rating is the nominal control voltage; the coil operates between 0.85 and 1.1 Uc (roughly 298 to 385 V DC) at 55 °C, and drops out between 0.15 and 0.2 Uc (about 52 to 70 V DC). That's a wide operating band, which helps in systems with sagging DC buses.
Timing and thermal behavior
Closing time is 30 to 40 ms; opening is 30 to 50 ms. Average resistance is 147.1 Ω inrush and 40385 Ω holding at 20 °C.