{"product_id":"square-d-lja36400u31x-400a-3p-600v-circuit-breaker","title":"Square D LJA36400U31X 400A 3P 600V Circuit Breaker, Plug-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LJA36400U31X — a high-capacity, plug-on circuit breaker engineered for dependable protection in panelboards, load centers, and electrical distribution systems. Designed with retrofit projects in mind, this 400 A, 3-pole device keeps your part numbers consistent for easier maintenance planning and faster service calls.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3 Poles\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting\u003c\/strong\u003e: Plug-On\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: LJA36400U31X\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTypical Applications\u003c\/strong\u003e: Panelboards, Load centers, Electrical distribution networks\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe LJA36400U31X stands out where uptime and reliability matter. Its plug-on design streamlines installation, reduces service time during upgrades, and provides solid, repeatable protection for three-phase circuits in commercial and industrial environments. By choosing this model, you align your distribution protection with a trusted brand and a part number that supports streamlined maintenance and inventory management.\u003c\/p\u003e \u003ch3\u003eUse cases and practical benefits\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eRetrofit and upgrade projects where maintaining a consistent part number simplifies ordering and sparing.\u003c\/li\u003e \u003cli\u003eMaintenance planning for ongoing electrical distribution maintenance, minimizing downtime during breaker swaps.\u003c\/li\u003e \u003cli\u003eNew installations in panelboards and load centers that require a rugged, 3-pole 600 V protection device with plug-on mounting.\u003c\/li\u003e \u003cli\u003eSpare-part strategy for facilities that rely on Square D components to reduce procurement lead times.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNeed help matching a part number or confirming compatibility with your panel or distribution setup? AmpState provides guidance to verify fit and ensure a correct, secure installation. \u003cstrong\u003eAvailabe from AmpState\u003c\/strong\u003e, with support to confirm fit and answer technical questions about the LJA36400U31X.\u003c\/p\u003e \u003cp\u003eChoose the Square D LJA36400U31X for dependable, plug-on circuit protection that keeps your electrical distribution running smoothly—now and in the future.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410873929890,"sku":"LJA36400U31X","price":13633.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/square-d-lja36400u31x-400a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}