{"product_id":"square-d-li36400-400a-3-pole-plug-in-circuit-breaker","title":"Square D LI36400 - 400 A, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LI36400 – a 400A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built for fast installation and straightforward replacements, this unit keeps electrical systems running smoothly in busy spaces—from homes to commercial offices and light industrial environments.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and easy replacement in dense panel layouts, minimizing downtime during service or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection against overcurrent and short circuits, adapting to varying load conditions for consistent performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400A, 3-pole configuration\u003c\/strong\u003e provides robust protection for high-current branch circuits and multi-wire panelboard setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is specifically meant to work with matching Square D load centers and panelboards, ensuring proper fit, electrical coordination, and reliable operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded-case construction\u003c\/strong\u003e offers rugged durability suitable for residential, commercial, and light industrial applications, with clear labeling for straightforward servicing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LI36400\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cp\u003eDesigned for a range of applications, this LI36400 is well-suited to protecting large residential service panels, commercial office spaces, light industrial panels, and equipment rooms where high-current reliability matters. It’s a practical replacement option when upgrading or expanding panel capacity, or when upgrading to a compatible plug-in solution that preserves existing panelboard architecture.\u003c\/p\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eChoose the LI36400 when your system requires a direct plug-in fit with Square D panelboards and load centers to maintain precise trip coordination and protection margins.\u003c\/li\u003e \u003cli\u003eDuring installation, ensure the power is de-energized and verify the panel’s compatibility with a 3-pole, 400A plug-in breaker to avoid mismatches.\u003c\/li\u003e \u003cli\u003eConsider spare units for quick field replacement to reduce downtime during maintenance windows in commercial or industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eSecure the Square D LI36400 400A, 3-pole plug-in breaker for reliable, high-current protection that aligns with your OEM panels and supports smooth, uninterrupted operation in residential, commercial, and light industrial settings. AmpState makes it available for fast, dependable sourcing when uptime matters.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355324502178,"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_2de8b260-96a7-4bf4-980d-906559dd66f4.png?v=1764691332","url":"https:\/\/www.ampstate.com\/products\/square-d-li36400-400a-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}