The Square D XCKJ162H7 is a heavy duty limit switch from the Telemecanique XCKJ series, built for position sensing in industrial environments where mechanical actuation is the reliable choice. It uses a steel roller plunger actuator with spring return and snap action — the roller follows cam profiles or machine motion, and the snap action gives a clean break, reducing contact bounce. Contact configuration is 1NO-1NC, rated 240 VAC 3 A and 250 VDC 0.27 A, which covers typical control-circuit loads (PLC inputs, relay coils, contactor auxiliaries) but not direct motor switching. The fixed body design means the head is not field-rotatable; the conduit entry is a fixed 1/2-inch NPT, so plan the cable routing before mounting.
Where it fits — enclosure and approvals
Enclosure is NEMA 1/2/3/4/12 and IP66, meaning it is dust-tight, protected against hose-directed water and ice formation — suitable for washdown areas, outdoor installations, and dry indoor locations alike. Approvals include UL 508 (industrial control equipment), CSA C22.2, CE, and CCC, so it is accepted in North American, European, and Chinese panels without additional certification work. The part also complies with EN/IEC 60947-5-1 (control circuit devices) and EN/IEC 60204-1 (safety of machinery), which covers the electrical safety and switching performance standards for limit switches in machine tools. RoHS compliant, so it passes the material restriction requirements for EU and many other markets.