{"product_id":"square-d-ma366001121-circuit-breaker","title":"Square D | MA366001121 | Circuit Breaker | 600A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MA366001121 Circuit Breaker — a robust three‑pole unit engineered for heavy‑duty electrical protection in both retrofit projects and new installations. Rated at 600 amps and 600 volts, this breaker is designed to safeguard large three‑phase circuits from overloads and short circuits while fitting into Square D panel systems.\u003c\/p\u003e \u003cp\u003eWhat sets MA366001121 apart\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh‑capacity protection\u003c\/strong\u003e: 600A rating enables it to safely interrupt large current loads in industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree‑pole configuration\u003c\/strong\u003e: Reliable protection across all three phases with a common trip for coordinated shutdown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry‑standard compatibility\u003c\/strong\u003e: Part number MA366001121 as the best reference for matching panels and accessories within Square D ecosystems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600V maximum voltage\u003c\/strong\u003e: Suitable for medium to high voltage applications common in facilities, manufacturing lines, and data centers.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIntended use and installation scenarios\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaintenance and service work: replace worn or failing breakers to restore circuit protection without changing the panel’s electrical architecture.\u003c\/li\u003e\n\u003cli\u003eRetrofit projects: upgrade legacy protection with a modern, compatible 3‑pole 600V breaker that aligns with existing Square D equipment.\u003c\/li\u003e\n\u003cli\u003eReplacement for aging equipment: ensure continuity of electrical safety with a part‑number matched unit.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFit, rating, and compatibility tips\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlways confirm fit and ratings before ordering — the part number MA366001121 is the most reliable reference for compatibility with compatible Square D panels and accessories.\u003c\/li\u003e\n\u003cli\u003eCheck your panel’s labeling for required breaker type, ampacity, and voltage rating to ensure a seamless replacement.\u003c\/li\u003e\n\u003cli\u003eHandle with standard electrical safety practices and follow manufacturer installation instructions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose Square D for heavy‑duty protection\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTrusted brand legacy in industrial and commercial electrical systems.\u003c\/li\u003e\n\u003cli\u003eSolid build and proven reliability for critical protection needs in manufacturing, facilities management, and utility infrastructure.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIf you’re sourcing a replacement or upgrading to a robust 600A, 3‑pole, 600V protection solution, the MA366001121 from Square D delivers compatibility, capacity, and confidence in one trusted package. Add it to your project shortlist and secure reliable circuit protection that keeps systems running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347143330,"sku":"MA366001121","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-ma366001121-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}