{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LA9FL4K4K","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LA9FL4K4K","canonicalUrl":"https://aoctrl.com/schneider/LA9FL4K4K","factsUrl":"https://aoctrl.com/api/mcp/products/LA9FL4K4K","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys F LA9FL4K4K, mechanical interlock, for 3 vertical contactors, LC1F500/CR1F500/LC1F630/LC1F800, active production.","salesMarkdown":"The LA9FL4K4K is a mechanical interlock from the TeSys F range, designed to prevent simultaneous closure of up to three contactors mounted vertically. It physically blocks the armature of one contactor when another is engaged, which is the standard way to enforce source-transfer or reversing schemes without relying on control logic alone. It interlocks specific TeSys F contactor models: bottom position accepts LC1F500 2P/3P/4P or CR1F500 3P/4P, middle position accepts the same, and top position accepts LC1F630 3P/4P or LC1F800 3P. Mounting is fixed at 3 vertical — the interlock bar runs along the vertical axis, so the three contactors must be stacked in a column. This is a panel-layout constraint to account for before wiring. ## Integration note The interlock is a passive mechanical bracket and rod assembly — no wiring, no coil, no auxiliary contacts. It mounts between the contactors on the DIN-rail or panel plate. Verify the contactor stack order matches the interlock's position assignments (bottom, middle, top) before tightening the mounting screws. The interlock does not add any electrical burden; it only enforces mechanical exclusivity. If the application requires electrical interlocking as well (e.g., for remote diagnostics), add normally-closed auxiliary contacts from each contactor's own block into the opposite coil circuit.","metaTitle":"TeSys LA9FL4K4K Mechanical Interlock, 3 Vertical Contactors","metaDescription":"TeSys F mechanical interlock LA9FL4K4K for 3 vertical contactors. Active production. Interlocks LC1F500, CR1F500, LC1F630, LC1F800. Source to RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"Range":"TeSys","title":"LA9FL4K4K","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","description":"TeSys F- mechanical interlock - for 3 vertical contactors","lifecycle_stage":"current","Device short name":"LA9F","Interlocking type":"Mechanical","Mounting position":"3 vertical","Interlocked device":"Bottom LC1F500 2P or 3P or 4P Bottom CR1F500 3P or 4P Middle LC1F500 2P or 3P or 4P Middle CR1F500 3P or 4P Top LC1F630 3P or 4P Top LC1F800 3P Top CR1F630 3P or 4P","Nbr. of units in pkg.":"1","Product or Component Type":"Mechanical interlock","Accessory / separate part category":"Interlocking accessory"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/dccd0c30138b3164e8be48c757b96019.pdf","sourceUrl":"https://www.se.com/sg/en/product/LA9FL4K4K/tesys-f-mechanical-interlock-for-3-vertical-contactors/"},"ai":{"faq":[{"question":"What contactors does this interlock work with?","answer":"It interlocks LC1F500 2P/3P/4P, CR1F500 3P/4P in the bottom and middle positions, and LC1F630 3P/4P or LC1F800 3P in the top position. The three contactors must be mounted vertically in a column."},{"question":"What is the TeSys range?","answer":"TeSys is Schneider Electric's brand for motor control and protection components — contactors, overload relays, breakers, and their accessories. The LA9FL4K4K is part of the TeSys F sub-range, which covers high-current contactors and associated parts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LA9FL4K4K","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/LA9FL4K4K when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}