What the XCKP2101N12 is and where it sits on the line
The Square D / Telemecanique XCKP2101N12 is a medium-duty limit switch, the class of mechanical position sensor used on machine guarding, conveyor gates, valve actuators and packaging heads where a repeating physical trip is the input the PLC needs. It carries the Telemecanique XCKP form-factor — the compact plastic-bodied DIN-mountable limit switch range that replaces the legacy metal-bodied XCK-P series on most modern machine builds, with the same contact-block geometry but a lighter housing better suited to indoor enclosures.
Ordering fingerprint and cross-check before the PO
The UPC 12-digit 389119078019 is the cleanest cross-check field — it survives across distributors and decodes to this exact XCKP2101N12 variant, which matters because the XCKP family is broad and adjacent codes such as XCKP2101N11 differ in actuator and contact arrangement. Because no official L-record successor appears in the catalogue for this code, the spec is stable: an integrator specifying the XCKP2101N12 today is specifying the same variant that has shipped for recent production runs, not a rolling substitute.