{"product_id":"square-d-lla36400u31x-400a-600v-3-pole-plug-in-circuit-breaker","title":"Square D LLA36400U31X - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LLA36400U31X—a 400 A, 600 V, 3-pole plug-in molded case circuit breaker designed to shield panelboards and load centers from overcurrent and short circuits. Available from AmpState, this unit blends industrial-grade protection with fast, hassle-free serviceability.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless replacement, minimizing panel downtime during upgrades or routine maintenance.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by reacting to both sustained overloads and sudden short-circuit events, helping prevent wiring damage and equipment failure.\u003c\/p\u003e \u003cp\u003eEngineered to be compatible with matching OEM load centers and panelboards, this 3-pole breaker provides a dependable, coordinated protection scheme for multi-phase electrical distribution. It’s suitable for residential, commercial, and light industrial applications where robust protection and easy maintenance matter.\u003c\/p\u003e \u003ch3\u003eKey specifications\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 LLA36400U31X\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\u003eVoltage rating:\u003c\/strong\u003e 600 V\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 cases\u003c\/h3\u003e\n\u003cp\u003eUse the LLA36400U31X as the main feeder protection in commercial panels or as a high-capacity protective device in light industrial setups. It’s well-suited for panel replacements and upgrades where fast, reliable plug-in installation minimizes downtime while maintaining a coordinated protection scheme across multi-pole circuits.\u003c\/p\u003e \u003ch3\u003eWhy choose this unit\u003c\/h3\u003e\n\u003cp\u003eThis breaker doesn’t just meet the basics—it delivers a proven protection strategy tuned for reliability in demanding environments. The combination of a plug-in form factor, a robust thermal-magnetic trip system, and OEM-compatible compatibility means you get quick serviceability without compromising safety or coordination with your existing load centers.\u003c\/p\u003e \u003ch3\u003eWhat to know before installation\u003c\/h3\u003e\n\u003cp\u003eEnsure compatibility with your OEM load centers and panelboards to maintain coordinated protection. The plug-in design is optimized for rapid replacement and streamlined field service, reducing downtime during maintenance or panel upgrades.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355326927010,"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_6d3a32ee-e77e-4d55-a26f-1062d3c14ed8.png?v=1764691364","url":"https:\/\/www.ampstate.com\/products\/square-d-lla36400u31x-400a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}