{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LA9FL4J4F","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LA9FL4J4F","canonicalUrl":"https://aoctrl.com/schneider/LA9FL4J4F","factsUrl":"https://aoctrl.com/api/mcp/products/LA9FL4J4F","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys F, LA9FL4J4F, mechanical interlock for 3 vertical contactors, active lifecycle.","salesMarkdown":"The LA9FL4J4F is a mechanical interlock from the TeSys F range, designed to prevent simultaneous closure of up to three vertically stacked contactors — a standard safety practice for reversing or dual-speed motor starters where both contactors must never energize at the same time. The interlock physically blocks the armature of one contactor while the other is pulled in, so even a welded main contact or a stuck coil cannot create a phase-to-phase short across the load. ## Which Contactors It Fits This accessory mounts in a 3-vertical stack and interlocks the following combinations: bottom position accepts LC1F115 through LC1F150 (3P or 4P) or CR1F150 (3P or 4P); middle position accepts LC1F400 (2P, 3P, or 4P) or CR1F400 (3P or 4P); top position accepts LC1F630 (3P or 4P), LC1F800 (3P), or CR1F630 (3P or 4P). That means you can mechanically interlock a small reversing pair (e.g., two LC1F115s) or a three-contactor star-delta or dual-speed starter with mixed frame sizes — the same LA9FL4J4F covers the spread. Sourcing is straightforward — specify this order code against an RFQ for quoted delivery.","metaTitle":"TeSys LA9FL4J4F Mechanical Interlock, Active, for 3 Contacto","metaDescription":"Active TeSys F mechanical interlock LA9FL4J4F for 3 vertical contactors. Mounts LC1F115–LC1F800 & CR1F150–CR1F630. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"Range":"TeSys","title":"LA9FL4J4F","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 LC1F400 2P or 3P or 4P Middle CR1F400 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/1fe68f9945639fbac371036832eccf33.pdf","sourceUrl":"https://www.se.com/vn/en/product/LA9FL4J4F/tesys-f-mechanical-interlock-for-3-vertical-contactors/"},"ai":{"faq":[{"question":"What contactors does the LA9FL4J4F interlock?","answer":"It interlocks three vertically mounted contactors: bottom LC1F115–LC1F150 or CR1F150; middle LC1F400 or CR1F400; top LC1F630, LC1F800, or CR1F630 — in 3P or 4P variants as listed."},{"question":"What is the TeSys range for this part?","answer":"The LA9FL4J4F belongs to the TeSys F range of contactors and accessories."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LA9FL4J4F","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/LA9FL4J4F 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}}