The Square D XCKM101 is a general-duty compact limit switch with a rotary lever plunger actuator. Its 240 VAC 3 A contact rating drops to 0.27 A at 250 VDC. The 1NO-1NC contact configuration gives one normally-open and one normally-closed set, which covers the standard feedback-and-interlock pair for a safety circuit or a two-wire proximity replacement. Spring-return snap action means the contacts transfer at a fixed actuation point regardless of plunger speed — no slow-contact welding risk on a slow-moving cam. Termination is via a PG11 cable gland with screw-clamp terminals inside. The PG11 entry accepts cable diameters roughly 6–10 mm, and the screw clamps handle solid or stranded wire up to about 2.5 mm². This is a field-wireable gland, not a quick-disconnect — plan for a 14 mm panel knockout and a wrench for the gland nut.
Deployment context
The ZAMAK zinc-alloy body and -13 to 158 °F operating range suit this switch for dry indoor locations. No IP rating is listed. Approvals include UL 508 (industrial control equipment), CSA C22.2 No. 14, and CE per the Low Voltage Directive. The applicable standards EN/IEC 60204-1 (safety of machinery — electrical equipment) and EN/IEC 60947-5-1 (control circuit devices — switching elements) confirm it meets the machinery directive requirements for a position switch in a CE-marked panel.
Key fit checks are the 1NO-1NC contact arrangement, rotary lever plunger actuator, and PG11 cable entry. The 240 VAC 3 A / 250 VDC 0.27 A rating suits most pilot-duty circuits.