{"product_id":"square-d-lra36400u43x","title":"Square D LRA36400U43X 400A 3-Pole 600 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LRA36400U43X — a purpose-built protector for demanding industrial and commercial electrical systems. This 400 A, 3-pole circuit breaker delivers dependable overcurrent protection at up to 600 V, making it a precise, reliable choice for safeguarding large feeders, three-phase equipment, and critical motor loads. With the exact part number LRA36400U43X, you can trust a perfect fit in compatible Square D panels and enclosures.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 400 A — robust protection for high-load feeders and heavy-duty circuits\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3 — designed for three-phase systems, ensuring coordinated interruption across all phases\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V — suitable for industrial distribution networks and commercial applications\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LRA36400U43X — guarantees exact replacement compatibility within Square D installations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand reliability:\u003c\/strong\u003e Square D’s lineage of safety and dependable performance in electrical protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this model stands out in real-world setups: it’s built to handle the complexities of large facilities where dependable trip performance across three phases is non-negotiable. Whether you’re protecting feeders feeding HVAC, processing equipment, conveyors, or power distribution panels, this 400 A, 3-pole device helps ensure quick and controlled shutoffs when faults occur, reducing risk to both equipment and personnel.\u003c\/p\u003e \u003ch4\u003eIdeal use cases\u003c\/h4\u003e\n\u003cul\u003e \u003cli\u003eInterrupting faults on three-phase feeders feeding motors and heavy machinery in manufacturing facilities\u003c\/li\u003e \u003cli\u003eProviding main overcurrent protection for commercial or industrial panelboards that require 600 V ratings\u003c\/li\u003e \u003cli\u003eServing as a dedicated protection device for critical three-phase power distribution in large industrial spaces\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical notes for installation and compatibility: ensure the breaker is used in a compatible Square D panel or enclosure that supports the LRA36400U43X family, and follow standard electrical practices for torque and termination. This part is intended for professionals performing precise, code-compliant replacements and upgrades in systems where reliability and exact fit are essential.\u003c\/p\u003e \u003cp\u003eChoosing the Square D LRA36400U43X means pairing a high-capacity, three-phase protection solution with the peace of mind that comes from a recognized brand. If your installation requires a 400 A, 3-pole device rated for up to 600 V, this part delivers the performance and compatibility you need to keep large electrical networks safe and operating smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423051731106,"sku":"LRA36400U43X","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-lra36400u43x","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}