{"product_id":"square-d-ma363001121-circuit-breaker","title":"Square D | MA363001121 | Circuit Breaker | 300A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MA363001121 circuit breaker — a purpose-built protector for demanding electrical systems that demand reliable, precise protection. Designed for maintenance, retrofit, and replacement, this unit is tailored to environments where exact specifications matter, ensuring your panel continues to run safely and efficiently.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 3-Pole, ideal for three-phase circuits\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e MA363001121\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest use:\u003c\/strong\u003e Maintenance, retrofit, and replacement projects requiring precise spec alignment\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this model stands out in real-world installations: the 3-pole design provides robust overcurrent protection for 3-phase feeders and equipment operating at up to 600 volts. When you’re upgrading an aging panel, replacing a failed breaker, or retrofitting for a higher-demand circuit, the MA363001121 delivers dependable performance that aligns with the original Square D specifications you rely on.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIndustrial facilities upgrading control panels or motor-distribution circuits into a three-phase 600V system\u003c\/li\u003e \u003cli\u003eMaintenance inventories for facilities with Square D legacy panels that require exact-specified replacements\u003c\/li\u003e \u003cli\u003eRetrofit projects where maintaining proper protection coordination and trip characteristics is essential\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical selection tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways verify fit and ratings against your panel’s data sheet. The MA363001121 part number is your strongest reference for compatibility.\u003c\/li\u003e \u003cli\u003eConfirm the breaker’s form factor, mounting, and termination method matches the existing installation to avoid compatibility gaps.\u003c\/li\u003e \u003cli\u003eUse this model for applications where a 300 A, 3-Pole, 600 V protection device is required to safeguard three-phase equipment and feeders.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn short, the Square D MA363001121 is a precise, reliable choice for specialists who need an exact-match replacement or retrofit component. By sticking with the specified part number and ratings, you preserve protective coordination, minimize downtime, and maintain the integrity of your 3-phase, 600V electrical system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347864226,"sku":"MA363001121","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-ma363001121-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}