{"product_id":"square-d-mef436ls-circuit-breaker","title":"Square D | MEF436LS | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D \u003cstrong\u003eMEF436LS\u003c\/strong\u003e Circuit Breaker—a robust 400A, \u003cstrong\u003e3-Pole\u003c\/strong\u003e protector designed for demanding electrical environments. Rated for up to \u003cstrong\u003e600V\u003c\/strong\u003e, this unit is the reliable choice for maintenance, retrofit, and replacement projects where exact specifications matter.\u003c\/p\u003e \u003cp\u003eDesigned to integrate seamlessly with panels and equipment that accept the MEF family, the \u003cstrong\u003eMEF436LS\u003c\/strong\u003e gives you a precise, compatible solution when matching existing safety and performance characteristics is essential. This isn’t a generic replacement—it's a specific, verified fit that helps minimize downtime and ensure continued system protection.\u003c\/p\u003e \u003ch3\u003eKey benefits that matter in the field\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e400A interrupting capacity\u003c\/strong\u003e provides robust protection for high-demand circuits typical in industrial and commercial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole configuration\u003c\/strong\u003e supports balanced protection across three-phase systems, aiding in stable voltage and machine performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V rating\u003c\/strong\u003e covers a wide range of distribution applications, helping you future-proof installations.\u003c\/li\u003e \u003cli\u003eThe \u003cstrong\u003epart number MEF436LS\u003c\/strong\u003e is the best reference for compatibility, making procurement and cross-checks straightforward.\u003c\/li\u003e \u003cli\u003eSpecifically suitable for \u003cem\u003emaintenance, retrofit, and replacement\u003c\/em\u003e scenarios—minimizing disruption while restoring reliable protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replacing aging breakers in existing panels that require exact MEF-series specifications.\u003c\/li\u003e \u003cli\u003eRetrofit projects where maintaining the original electrical characteristics is critical for system protection.\u003c\/li\u003e \u003cli\u003eNew builds or service upgrades where a clearly defined 400A, 3-phase, 600V protection profile is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, \u003cstrong\u003econfirm fit and ratings\u003c\/strong\u003e to ensure a seamless match with your panel and wiring. Use the \u003cstrong\u003eMEF436LS\u003c\/strong\u003e part number as the definitive reference when checking compatibility with your equipment and documentation. Follow standard electrical safety practices, verify panel labeling, and adhere to manufacturer guidelines during installation to ensure secure mounting and reliable operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426345308322,"sku":"MEF436LS","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-mef436ls-circuit-breaker-400a-3-pole-600v-978.webp?v=1789560455","url":"https:\/\/www.ampstate.com\/products\/square-d-mef436ls-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}