The Schneider Electric TeSys LX4FX400 is a replacement contactor coil for the FX series of contactors, part of the broader TeSys range. It is a DC low-consumption control circuit coil rated for 400 V DC control voltage, with an operating range of 0.85...1.1 Uc at 131 °F (55 °C) and a drop-out range of 0.2...0.4 Uc at the same temperature.
The 400 V DC control voltage is the headline spec — this coil is designed for DC control circuits, not standard 24 V or 120 V AC panels. The opening time of 100...130 ms and closing time of 70...80 ms define the mechanical response of the contactor; for applications requiring fast arc extinction or precise timing, these numbers confirm the coil's switching speed is within the expected range for a power contactor of this class. The coil is supplied without a built-in suppressor module, which means the installer must add external flyback diode or RC snubber protection across the coil terminals to prevent voltage spikes from damaging the control circuit. This is standard practice for DC coils but worth flagging if the existing installation expects a suppressed coil.
This coil mounts directly onto the FX series contactor frame. It is a service part (category 18401-WORLD SERVICE PARTS(CTR ACCESS)), meaning it is intended as a replacement or spare for existing FX contactors in the field, not as a first-fit component for new assemblies. The single-unit packaging confirms it is ordered per coil, not in bulk reels.