{"product_id":"square-d-ma365001121-circuit-breaker","title":"Square D | MA365001121 | Circuit Breaker | 500A | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MA365001121 circuit breaker — a high-current protection solution engineered for commercial and industrial panels that demand precise, reliable performance. With a 500A rating and a 600V maximum, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter. The part number MA365001121 serves as the clearest reference for compatibility, helping you verify a perfect fit before you order.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 500A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MA365001121\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest compatibility reference:\u003c\/strong\u003e The MA365001121 part number is the most reliable indicator for matching your Square D equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Square D breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact-fit reliability:\u003c\/strong\u003e Designed to integrate with Square D panels and distribution gear, reducing the risk of misfits during replacements or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current protection:\u003c\/strong\u003e 500A rating provides robust protection for demanding circuits in commercial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for retrofit and maintenance:\u003c\/strong\u003e Ideal for projects where you’re updating older systems or swapping in a like-for-like replacement to minimize downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility reference:\u003c\/strong\u003e Rely on the part number MA365001121 as the best indicator of fit, ensuring you don’t guess your way through a replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases and applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and service upgrades on established Square D panels where a like-for-like replacement is required.\u003c\/li\u003e \u003cli\u003eRetrofits in commercial facilities and light-industrial settings that demand reliable high-current protection.\u003c\/li\u003e \u003cli\u003eReplacement parts for aging systems in service equipment, main distribution panels, or large-capacity circuits.\u003c\/li\u003e \u003cli\u003eProject work where exact specs are essential to maintain system integrity and safety compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for a smooth install\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eVerify fit and ratings before ordering:\u003c\/strong\u003e Use the MA365001121 part number as the best compatibility reference to ensure the breaker matches your equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEngage a licensed electrician:\u003c\/strong\u003e Ensure proper handling, isolation of power, and adherence to local electrical codes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrepare for safe installation:\u003c\/strong\u003e Follow standard lockout\/tagout procedures and inspect for any panel-specific requirements before replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat you gain with this OEM Square D part\u003c\/h3\u003e\n\u003cp\u003eOpting for the MA365001121 means choosing a breaker that’s built to align with Square D’s design language and electrical characteristics. This alignment translates to fewer compatibility surprises, streamlined installation, and dependable protection for high-current loads in your facility. If you’re upgrading or replacing in a system that expects a 500A, 600V device, this breaker is crafted to meet those exacting standards — backed by the reassurance that the part number is your strongest clue to a correct, long-lasting fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347241634,"sku":"MA365001121","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-ma365001121-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}