The TeSys LX4D4XD is a replacement control relay-contactor, classified under Category 18401 — World Service Parts (CTR Access). This means it's stocked as a service spare for existing TeSys installations, not a new-design-in component.
Sourcing Reality for the BOM Line
For a procurement buyer filling a BOM line, the LX4D4XD is a straightforward order: active status means no last-time-buy clock, no broker scavenger hunt. The description notes it replaces an obsolete control relay-contactor within the TeSys family, so if you're swapping out an older TeSys part that's gone end-of-life, this is the direct service replacement.