The Square D XCKJ10511 is a heavy-duty limit switch from the Osiswitch line, built for position sensing on industrial machinery, conveyors, and automated gates where the environment is wet or dusty. The Zamak zinc alloy body and IP66 / NEMA 4 enclosure mean it handles washdown and outdoor exposure without a secondary cover — that's the same rating you'd spec for a food-processing line or a car-wash bay. Contact rating is 10 A at 240 VAC and 0.27 A at 250 VDC, SPDT configuration. The AC side handles typical motor-starter or relay-coil loads; the DC side is low-current — 0.27 A at 250 VDC is about 67 W, so it's fine for a PLC input or a small DC solenoid, not a DC motor contactor. The spring-return snap-action gives a clean break, which helps with DC arc extinction at that voltage. The rotary head with a Delrin roller lever gives 23° pretravel and 90° total travel, with 11° differential travel. That means the lever has to move about a quarter-turn before the contacts flip, and the deadband between make and break is about 11°. It's a standard feel for a roller-lever limit switch — predictable for cam-actuated sequences.
Approvals include UL and CSA, plus it's built to EN/IEC 60204-1 and EN/IEC 60947-5-1.
Connection and mounting
Termination is through a PG13.5 cable gland with screw-clamp terminals inside. That's a metric thread — common in European-sourced panels — so you'll need a PG13.5 cord grip or conduit adapter. The non-plug-in body means the cable enters directly; there's no separate base to swap if the switch fails, but it also means one less potential leak path in wet locations. Operating temperature range is -13 to 158 °F (-25 to 70 °C). That's fine for most indoor and outdoor enclosures in temperate climates; if you're mounting it on a freezer door or a kiln, check the ambient at the actuator.