{"product_id":"square-d-mhp36300-circuit-breaker","title":"Square D | MHP36300 | Circuit Breaker | 300A","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D MHP36300 circuit breaker—a trusted, high-amp interruption device designed for maintenance, retrofit, and replacement projects that demand precise compatibility with Square D panels. With a robust 300-amp rating, this breaker helps you protect demanding electrical loads while keeping your system within its intended specifications.\u003c\/p\u003e \u003ch3\u003eKey details\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel \/ Part\u003c\/strong\u003e: MHP36300\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 300A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest use\u003c\/strong\u003e: maintenance, retrofit, and replacement in compatible Square D panels\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEssential note\u003c\/strong\u003e: Confirm fit and ratings before ordering; the part number is the best reference for compatibility\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cp\u003eIf you manage or service Square D electrical systems and need a reliable 300A circuit interrupter, the MHP36300 is crafted for professionals performing panel maintenance, panel upgrades, or component replacements. It’s particularly valuable in retrofit projects where upgrading to higher amperage demands careful alignment with the panel’s approved configurations.\u003c\/p\u003e \u003ch3\u003eWhy this 300A breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect compatibility reference\u003c\/strong\u003e: The MHP36300 part number is your best guide to ensuring the breaker fits the target Square D panel without ad-hoc modifications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance-friendly\u003c\/strong\u003e: Keeps critical electrical infrastructure running by offering a readily available, standard 300A option for aging or tripping components.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRetrofit-ready\u003c\/strong\u003e: Enables up-sizing or replacing a worn breaker in systems designed to accept a 300A device, reducing downtime and risk.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear, practical use cases\u003c\/strong\u003e: Ideal for service panels where a precise 300A interruption is required and where maintaining panel integrity is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and practical insights\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: swap in a like-for-like 300A breaker in panels showing signs of wear or nuisance tripping, using the MHP36300 as the definitive compatibility reference.\u003c\/li\u003e \u003cli\u003eRetrofit: upgrade to a 300A protection level in a panel that supports this rating, ensuring the replacement aligns with Square D engineering standards.\u003c\/li\u003e \u003cli\u003eReplacement stock: keep a compatible 300A option on hand for quick, accurate replacements, minimizing troubleshooting time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and verification tips\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, verify that your panel accepts the MHP36300 by checking the panel’s documentation and labeling for approved breaker models. Use the MHP36300 part number as the primary compatibility reference, and confirm the panel’s amperage rating aligns with 300A to avoid mismatches or safety concerns.\u003c\/p\u003e \u003ch3\u003eSpecifications recap\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MHP36300\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427242561698,"sku":"MHP36300","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/square-d-mhp36300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}