{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XCKM121H7","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"XCKM121H7","canonicalUrl":"https://aoctrl.com/schneider/XCKM121H7","factsUrl":"https://aoctrl.com/api/mcp/products/XCKM121H7","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Osiswitch XCKM121H7 general duty compact limit switch, 240 VAC 3 A / 250 VDC 0.27 A, 1NO-1NC, ZAMAK zinc alloy body, thermoplastic roller lever plunger, 1/2 inch NPT cable gland.","salesMarkdown":"## What the 3 A contact rating means for your circuit The XCKM121H7 is rated 3 A at 240 VAC and 0.27 A at 250 VDC — that's the maximum continuous switching current, not the inrush. For a typical 120 VAC control circuit pulling a small relay coil (say 0.5 A holding), you've got headroom. But if you're switching a DC solenoid or a brake, the DC rating drops fast because DC arcs don't self-extinguish the way AC does. The 0.27 A at 250 VDC is the hard ceiling — stay under it or the contacts weld shut. The 1NO-1NC contact configuration gives you one normally-open and one normally-closed set in the same switch body. That lets you wire the NC as a safety feedback (opens when the lever is tripped) and the NO as a position signal to the PLC — all in one package without a second switch. ## Mechanical fit: pretravel, differential, and operating force The thermoplastic roller lever plunger is the wear point — the roller reduces friction against the cam surface, so it lasts longer than a plain plunger in high-cycle applications. The ZAMAK zinc alloy body handles the mechanical abuse of a machine frame or conveyor edge. ## Approvals and compliance documentation The XCKM121H7 carries UL 508, CSA C22.2, and CE approvals — that covers North American and European machinery safety standards. It also references EN/IEC 60204-1 (electrical equipment of machines) and EN/IEC 60947-5-1 (control circuit devices). These are the standards a panel builder or machine integrator needs to see for a CE declaration or UL 508A panel listing. Proposition 65 warning applies — the product contains DINP and DIDP, which are phthalates used in the plastic components. That's a California labeling requirement, not a functional restriction.","metaTitle":"Schneider Electric XCKM121H7 Limit Switch","metaDescription":"Schneider Electric XCKM121H7 general duty compact limit switch, 240 VAC 3 A / 250 VDC 0.27 A, 1NO-1NC, UL 508, CSA, CE. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Limit Switches"],"specifications":{"UPC":"78590123318","Type":"GENERAL DUTY, COMPACT","Model":"XCKM","title":"XCKM121H7","Approval":"UL 508, CSA C22.2, CE","Category":"General Duty Limit Switches","Pretravel":"4.6 MM","Brand Name":"Osiswitch[R]","description":"SQUARE D XCKM121H7: LIMIT SWITCH 240VAC 10AMP XCK +OPTIONS","Sub-Category":"General/Heavy Duty Limit Switch","UPC 12 Digit":"389110309693","Body Material":"ZAMAK[R] ZINC ALLOY","Contact Rating":"240 VAC 3 AMPERE, 250 VDC 0.27 AMPERE","Operation Type":"SPRING RETURN, SNAP ACTION","Connection Type":"1/2 INCH NPT CABLE GLAND/SCREW CLAMP TERMINAL","Operating Force":"5.4 LB","lifecycle_stage":"current","Actuator/Head Type":"THERMOPLASTIC ROLLER LEVER PLUNGER","Manufacturer Brand":"Square D Co.","Differential Travel":"2.2 MM","Product Description":"Telemecanique XCKM121H7 Limit Switch 240Vac 10Amp Xck +Options","Contact Configuration":"1NO-1NC","Operating Temperature":"-13 TO 158 DEG F","Additional Information":"APPLICABLE STANDARD EN/IEC 60204-1, EN/IEC 60947-5-1","Full Technical Description":"General Duty, Compact Type; 1NO-1NC Contact Configuration; 1/2 Inch NPT Cable Gland/Screw Clamp Terminal Connection Type; Spring Return, Snap Action Operation Type; 240 VAC 3 Ampere, 250 VDC 0.27 Ampere Contact Rating; UL 508, CSA C22.2, CE Approval; ZAMAK[R] Zinc Alloy Body Material; -13 to 158 Deg F Operating Temperature; 5.4 lb Operating Force; 2.2 mm Differential Travel; Thermoplastic Roller Lever Plunger Actuator/Head Type; 4.6 mm Pretravel; OSISWITCH[R] Brand; Applicable Standard En/Iec 60204-1, En/Iec 60947-5-1; XCKM Model","Proposition 65 Warning (CA)":"WARNING: This product can expose you to chemicals including: Diisononyl phthalate (DINP), which is known to the State of California to cause cancer, and Di-isodecyl phthalate (DIDP), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$315.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ec88b3e40563acc0821d6a54988e2ffd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the XCKM121H7 or check availability?","answer":"The XCKM121H7 is an active part, sourced to order against your BOM quantity. Submit an RFQ for your volume and we'll respond with a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/XCKM121H7","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/XCKM121H7 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}