{"product_id":"square-d-lll36400u33x-400a-3-pole-circuit-breaker","title":"Square D LLL36400U33X - 400 A, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D \u003cstrong\u003eLLL36400U33X\u003c\/strong\u003e is a 400 A, 3-pole molded case circuit breaker built to shield panelboards and load centers from overcurrent and short-circuit faults. With this unit in your electrical system, you gain reliable, rapid interruption to protect vital circuits and connected equipment.\u003c\/p\u003e \u003cp\u003eIts \u003cstrong\u003ecompact molded-case design\u003c\/strong\u003e maximizes panel space, allowing you to fit high-capacity protection without crowding other devices. The \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across varying loads and temperatures, reducing nuisance trips while maintaining dependable circuit safety.\u003c\/p\u003e \u003cp\u003eDesigned for \u003cstrong\u003eseamless compatibility\u003c\/strong\u003e with matching OEM Square D load centers and panelboards, this breaker installs cleanly in compatible assemblies, simplifying upgrades or main-breaker replacements in existing panels. It’s suitable for \u003cstrong\u003eresidential, commercial, and light industrial\u003c\/strong\u003e applications requiring robust 400 A protection for feeders and branch circuits.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LLL36400U33X\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUse cases in real-world setups include serving as a main feeder breaker in large service panels, protecting heavy feeders in commercial electrical rooms, or acting as a main-protection device in substantial residential subpanels. Its combination of high current capability, compact footprint, and compatibility with Square D load centers makes it a practical choice when you need dependable protection without sacrificing panel room.\u003c\/p\u003e \u003cp\u003eFor installation, ensure you’re pairing this breaker with a compatible OEM panelboard or load center and follow local electrical codes. The LLL36400U33X delivers clear, predictable performance when properly integrated into your protection scheme, helping you maintain safe, compliant, and efficient electrical distribution.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355327746210,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_5129cbd1-40b3-41ca-bee1-b4110e0b23f2.png?v=1764691375","url":"https:\/\/www.ampstate.com\/products\/square-d-lll36400u33x-400a-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}