{"product_id":"square-d-lll36400u31x-400a-3p-600v-circuit-breaker","title":"Square D LLL36400U31X Circuit Breaker, 400A, 3-Pole, 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LLL36400U31X circuit breaker — a rugged, industrial-grade safety device engineered for demanding electrical environments. With a 400 A rating, a 3-pole configuration for three-phase systems, and a 600 V maximum, this breaker is designed to protect your power distribution from faults while supporting reliable operation in heavy-use facilities.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LLL36400U31X\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this model stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect-fit for industrial service panels\u003c\/strong\u003e — designed to integrate with Square D panel systems and compatible installations when paired with the correct part number and application configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection\u003c\/strong\u003e — the 3-pole design ensures coordinated interruption across all phases, helping prevent unbalanced faults and protecting connected equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility pathway\u003c\/strong\u003e — use the part number LLL36400U31X to confirm fit for your specific panel and service requirements. If you’re unsure, our team can help verify the match.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eIndustrial electrical service installations needing robust protection for main feeders or large branch circuits.\u003c\/li\u003e \u003cli\u003eMaintenance projects replacing aging breakers to restore reliable trip performance and safety.\u003c\/li\u003e \u003cli\u003eSystem upgrades in manufacturing facilities, data centers, or large commercial\/industrial sites operating on 3-phase 600 V systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it protects your operation\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eQuickly interrupts fault currents to shield equipment and personnel.\u003c\/li\u003e \u003cli\u003eSupports safer, more dependable electrical distribution under heavy loads.\u003c\/li\u003e \u003cli\u003eStreamlines procurement and maintenance by centering decisions on a single part number for compatibility checks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eGetting the right fit\u003c\/h3\u003e\n\u003cp\u003eTo verify fit, compare your equipment requirements with the LLL36400U31X specifications and your panel’s documentation. If you need assistance matching a part number or confirming compatibility for your application, send us a message and we’ll help you confirm the right fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46415712780450,"sku":"LLL36400U31X","price":30425.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_513d6710-3734-4b27-839d-f68e6f4b470a.png?v=1765492974","url":"https:\/\/www.ampstate.com\/products\/square-d-lll36400u31x-400a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}