The Square D / Telemecanique XCKJ10511H29 is a fixed-body miniature limit switch from the XCKJ family, built for position sensing on industrial machinery. Its contact rating is 240 VAC at 3 A and 250 VDC at 0.27 A — that is a signal-level switch, not a motor-load device, so it feeds a PLC input or a contactor coil, not a direct power circuit. The 1NO-1NC contact block with spring-return snap action gives you one normally-open and one normally-closed set. The NC side is positively opened at 0.5 N force, which means the contacts are mechanically forced apart even if they weld — that is the safety-relevant feature for guard-door or interlock circuits per EN/IEC 60947-5-1. The thermoplastic roller lever actuator rides on a Zamak metal body, and the whole assembly is sealed to IP66 and NEMA 1/2/3/4/12. That means it handles hose-down cleaning and outdoor exposure — suitable for food processing lines, washdown zones, or covered outdoor conveyor sections.
Mounting and wiring reality
This is a fixed-body switch — the head is not field-rotatable, so the roller lever orientation is locked as shipped. The connection is a 1.5-meter pre-wired cable with an M20 x 1.5 metric gland entry, not a quick-disconnect plug. If your panel uses M12 or mini-change connectors, you will need a junction box or a cable splice. Overall dimensions are 1.57 inches wide by 1.73 inches deep by 3.03 inches high — compact enough for tight rail or bracket mounting. The actuation speed is rated at 1.5 meters per second, so it keeps up with fast-moving cams or slides.
Approvals and compliance — what the marks mean
The XCKJ10511H29 carries UL 508 (Industrial Control Equipment), CSA C22.2 No. 14, CE, and CCC marks. That means it is accepted for panel builds in North America (UL/CSA), the European Union (CE), and China (CCC). It is also RoHS compliant, so no restricted substances in the materials. The applicable standards include EN/IEC 60947-5-1 (control circuit devices and switching elements) and EN/IEC 60204-1 (safety of machinery — electrical equipment). These are the standards a machinery CE mark or a UL 508A panel shop will look for on a limit switch used in a safety-related position-sensing circuit.