{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LA9FL4G","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LA9FL4G","canonicalUrl":"https://aoctrl.com/schneider/LA9FL4G","factsUrl":"https://aoctrl.com/api/mcp/products/LA9FL4G","rawCanonicalId":null},"summary":{"shortDescription":"Schneider TeSys F LA9FL4G mechanical interlock, PCE, 2 vertical mounting, mechanical interlocking type, for bottom LC1F185...LC1F225 3P or 4P / CR1F185 3P or 4P and top LC1F630 3P or 4P / LC1F800 3P / CR1F630 3P or 4P.","salesMarkdown":"## Overview The LA9FL4G is a Schneider TeSys F mechanical interlock, order code LA9FL4G, in a PCE package with 2 vertical mounting. It provides mechanical interlocking between two contactors to prevent simultaneous closure, essential for reversing or changeover motor starter assemblies. This interlock is designed for use with bottom-mounted contactors in the 185–225 A frame and top-mounted contactors in the 630–800 A frame. The LA9FL4G mounts between two vertical contactors and uses a mechanical linkage to block the armature of one contactor from closing when the other is already closed. This prevents a direct short circuit across the supply that would occur if both contactors in a reversing pair were to close simultaneously. The interlock is a passive mechanical device — no electrical connections or power supply are needed. It relies on the physical travel of the contactor armatures; the interlock rod transfers motion between the two contactors, ensuring that only one can be in the closed position at any time. ## Applications This mechanical interlock is used in reversing contactor assemblies for motor direction control — for example, in conveyor drives, hoists, winches, and pump reversing stations where a three-phase motor must run forward and reverse. It is also used in changeover schemes for dual-power supplies or standby generator transfer. Within the TeSys F range, the LA9FL4G fits assemblies that pair a smaller bottom contactor (up to 225 A frame) with a larger top contactor (up to 800 A frame), a common configuration for high-inertia loads where the reversing contactor must handle the full motor current while the forward contactor is smaller.","metaTitle":"Schneider LA9FL4G TeSys F Mechanical Interlock, 2 Vertical","metaDescription":"Schneider TeSys F LA9FL4G mechanical interlock, PCE, 2 vertical mounting, for LC1F185–LC1F225 bottom / LC1F630–LC1F800 top contactors. Discontinued.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Range":"TeSys","Category":"US10I1222341","lifecycle_stage":"current","Mounting Support":"Asymmetrical AM1-EC rail","Device short name":"LA9F","Interlocking type":"Mechanical","Mounting position":"2 vertical","Interlocked device":"Bottom LC1F185...LC1F225 3P or 4P Bottom CR1F185 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":"$149.69","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c6256d2f6d1b34d6d2cb186ed0be1e8c.pdf","sourceUrl":"https://www.se.com/vn/en/product/LA9FL4G/tesys-f-mechanical-interlock-for-2-vertical-contactors/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LA9FL4G/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LA9FL4G","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/LA9FL4G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}