{"product_id":"square-d-lx36400-400a-3-pole-plug-in-circuit-breaker","title":"Square D LX36400 - 400 A, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D LX36400 - 400 A, 3-Pole Plug-In Molded Case Circuit Breaker from AmpState. Engineered for dependable branch circuit overcurrent and short-circuit protection, this unit is designed to live in panelboards and load centers where fast, secure protection matters most. Whether you’re upgrading an older panel or stocking for installations, the LX36400 delivers a reliable safeguard for demanding electrical systems.\u003c\/p\u003e \u003ch3\u003eWhy the LX36400 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless replacements, reducing downtime during servicing or panel upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection performance across a range of loads and ambient temperatures, minimizing nuisance trips while safeguarding circuitry.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e with matching Square D load centers and panelboards ensures a precise fit, proper electrical clearance, and reliable long-term operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple sectors\u003c\/strong\u003e suitable for residential, commercial, and light industrial applications, where robust 3-pole protection is essential for three-phase circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications 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 LX36400\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 400 A\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\u003ePractical use cases and benefits\u003c\/h3\u003e\n\u003cp\u003eIn residential settings, the LX36400 is ideal for protection in main distribution panels that feed high-draw loads such as HVAC equipment, electric water heaters, and large subpanels. For commercial spaces, it serves as a reliable safeguard for three-phase distribution in storefronts, offices, and service areas where consistent trip characteristics protect equipment and occupants alike. In light industrial environments, this breaker delivers dependable protection for motor circuits and heavy lighting loads, helping prevent costly downtime due to short circuits or overloads.\u003c\/p\u003e \u003ch3\u003eWhat makes it the right choice\u003c\/h3\u003e\n\u003cp\u003eChoosing a plug-in solution like the LX36400 reduces installation complexity and downtime. Its 3-pole design ensures simultaneous disconnection of all live conductors, enhancing safety and compliance in panelboard configurations. The thermal-magnetic trip mechanism provides a predictable response to overloads and short circuits, giving technicians and facility managers confidence in protection performance across a range of operating conditions. When you need a like-for-like, OEM-compatible replacement that maintains panel integrity and protection curves, this Square D breaker stands out.\u003c\/p\u003e \u003ch3\u003eWho should consider this breaker\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical contractors performing panel upgrades or replacements in residential, commercial, or light industrial projects\u003c\/li\u003e \u003cli\u003eFacilities managers maintaining existing panelboards that require robust 400 A, 3-pole protection\u003c\/li\u003e \u003cli\u003eSystems integrators seeking reliable, OEM-aligned components for three-phase electrical distributions\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility notes\u003c\/h3\u003e\n\u003cp\u003eFor best results, pair the LX36400 with compatible Square D load centers and panelboards. The plug-in design streamlines installation and service calls, enabling swift exchanges without altering wiring configurations. Always verify panel compatibility and follow standard electrical safety practices during installation or replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355329810594,"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_e69f93b8-f5e7-425c-ad38-e0db11e4d3f7.png?v=1764691386","url":"https:\/\/www.ampstate.com\/products\/square-d-lx36400-400a-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}