The Square D XCKL102H7 is a limit switch from the XCKL series, built with a Zamak body and a roller plunger actuator on top. The IP66 rating means the housing seals against dust ingress and high-pressure water jets from any direction — so it holds up on washdown lines or outdoor conveyor stations without an extra boot. The 1NO/1NC contact form gives one normally-open and one normally-closed set, which is the standard arrangement for dual-channel safety circuits or position feedback with a separate signal. AC contact rating is 3 A at 240 V, and DC contact rating is 0.27 A at 250 V — the DC figure is the one that governs inductive loads like DC solenoids or small relays, because DC arcs are harder to extinguish than AC.
Temperature and environmental limits
Operating temperature range is -13 °F to 158 °F (-25 °C to 70 °C). The switch is rated shock and vibration resistant, which is typical for a limit switch on a reciprocating machine or a vehicle-mounted application. No boot is included on the actuator — if the roller plunger sees direct washdown, an external boot kit is worth adding to keep debris out of the plunger shaft.