{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LA9FL4F4F","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LA9FL4F4F","canonicalUrl":"https://aoctrl.com/schneider/LA9FL4F4F","factsUrl":"https://aoctrl.com/api/mcp/products/LA9FL4F4F","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys F, LA9FL4F4F, mechanical interlock for 3 vertical contactors, LC1F115 through LC1F800 and CR1F150 through CR1F630.","salesMarkdown":"The LA9FL4F4F is a mechanical interlock accessory from the TeSys F range, designed to key three contactors vertically so only one can close at a time. It prevents simultaneous closure — critical for reversing drives, star-delta transitions, or any circuit where two contactors energizing together creates a phase-to-phase short. Mounts in a 3-vertical stack. The interlock ties the bottom contactor (LC1F115 through LC1F150 or CR1F150, 3P or 4P), the middle contactor (same range), and the top contactor (LC1F630 or LC1F800 3P, or CR1F630 3P or 4P). That covers the full TeSys F frame from 115 A up to 800 A. ## Integration note This is a purely mechanical interlock — no electrical connections, no auxiliary contacts. It clips onto the contactor fronts and uses a sliding bar to block the other armatures when one pulls in. The 3-vertical stack eats the same DIN-rail footprint as the contactors themselves; no extra panel width needed, just height. For a 3-contactor star-delta starter on a 250 kW motor, this interlock guarantees the star and delta contactors never overlap. The mechanical tie is faster than any electrical interlock relay and doesn't fail if a coil supply drops. No direct replacement exists because none is needed — this is the current mechanical interlock for the TeSys F contactor family. If you're maintaining a panel built around LC1F contactors, this is the factory-specified interlock.","metaTitle":"Schneider TeSys LA9FL4F4F mechanical interlock, 3 vertical c","metaDescription":"Active TeSys F mechanical interlock for 3 vertical contactors LC1F115-LC1F800. Mechanical interlocking type. Order LA9FL4F4F against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"Range":"TeSys","title":"LA9FL4F4F","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 LC1F115...LC1F150 3P or 4P Bottom CR1F150 3P or 4P Middle LC1F115...LC1F150 3P or 4P Middle CR1F150 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/066b2175b72a39ff25fe84f3fdda812b.pdf","sourceUrl":"https://www.se.com/sg/en/product/LA9FL4F4F/tesys-f-mechanical-interlock-for-3-vertical-contactors/"},"ai":{"faq":[{"question":"Which contactors does this interlock work with?","answer":"It interlocks three vertical contactors: bottom and middle positions accept LC1F115 through LC1F150 or CR1F150 (3P or 4P); top position accepts LC1F630 or LC1F800 3P, or CR1F630 3P or 4P."},{"question":"What is the mounting arrangement?","answer":"Three vertical contactors stacked. The interlock bar runs vertically across all three armatures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LA9FL4F4F","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/LA9FL4F4F 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}}