{"product_id":"square-d-mgl26400-circuit-breaker","title":"Square D | MGL26400 | Circuit Breaker | 400A | 2-Pole | 18kA","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D MGL26400 circuit breaker—a robust, 400A, 2-pole device designed to protect heavy electrical systems with precision. Built for maintenance, retrofit, and replacement projects, this breaker delivers dependable performance when your existing Square D installation demands exact specs.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MGL26400\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInterrupt rating:\u003c\/strong\u003e 18kA\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the MGL26400 for your Square D system\u003c\/h3\u003e\n\u003cp\u003eWhen you're upgrading or replacing a main or feeder breaker in a Square D installation, matching the \u003cstrong\u003epart number MGL26400\u003c\/strong\u003e guarantees alignment with the panel’s design and trip characteristics. The 400A rating supports substantial load centers, while the 2-pole configuration protects both hot legs, ensuring comprehensive protection for multi-wire circuits. The 18kA interrupt rating means it can safely clear high-energy faults, helping reduce damage to downstream equipment.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eThis breaker is ideal for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance outages where exact replacement is required\u003c\/li\u003e \u003cli\u003eRetrofit projects updating older Square D panels to current safety standards\u003c\/li\u003e \u003cli\u003eReplacement after a fault in a 400A, two-pole circuit\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and ordering notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e Confirm fit and ratings before ordering. The \u003cstrong\u003epart number is the best reference for compatibility\u003c\/strong\u003e with your Square D panel or distribution system. Because electrical systems vary, verify that your panel accepts MGL-series breakers and that 18kA interrupt capacity aligns with your fault current calculations.\u003c\/p\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eKeep spare MGL26400 on hand for planned maintenance or unexpected outages to minimize downtime.\u003c\/li\u003e \u003cli\u003eBefore installation, ensure the panel’s bus design and wiring accommodate a 2-pole 400A breaker with 18kA interrupt capacity.\u003c\/li\u003e \u003cli\u003eDocument the replacement using the exact part number (MGL26400) to simplify future maintenance or audits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Square D MGL26400 circuit breaker when you need a precise, reliable 2-pole, 400-amp protection device for demanding applications. Its design aligns with Square D standards, delivering predictable performance and straightforward compatibility for maintenance, retrofit, or replacement projects.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46424750588066,"sku":"MGL26400","price":6518.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-mgl26400-circuit-breaker-400a-2-pole-18ka-826.webp?v=1789410990","url":"https:\/\/www.ampstate.com\/products\/square-d-mgl26400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}