The Schneider LX4D2SW is a replacement control relay-contactor under the TeSys line, classified under Category 18402-World Service Parts (Control Access). This means it's a service-part variant — a drop-in intended to replace an older or obsolete control relay or contactor in an existing TeSys installation, not a new-design component for a greenfield panel. If you're maintaining a line that originally used a TeSys control relay and the original order code is no longer available, this is the service-part cross-reference that keeps the cabinet running without re-wiring the control scheme.
Installation and Integration Note
The coil and auxiliary contacts land on the same terminal layout as the original TeSys relay it replaces, so the existing wiring harness should transfer without re-terminating every conductor — a real time-saver when you're swapping a failed relay during a shift. Verify the coil voltage and contact configuration against the nameplate of the unit you're pulling out; the LX4D2SW's spec sheet carries that detail, and matching it avoids a second trip to the panel.