{"product_id":"square-d-mef436li-circuit-breaker","title":"Square D | MEF436LI | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eSquare D MEF436LI is a 400A, 3-Pole, 600V circuit breaker designed for reliability in demanding electrical environments. Identified by part number MEF436LI, this unit is ideal for maintenance, retrofit, and replacement projects where exact specs must be matched to the original equipment. Before ordering, confirm fit and ratings using the MEF436LI reference as the primary compatibility check.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhat makes it stand out\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eExact compatibility when you need a like-for-like replacement for Square D panels that require MEF436LI\u003c\/li\u003e\n\u003cli\u003eHigh-current protection with a 400A rating to safeguard feeders, motors, and critical circuits in three-phase systems\u003c\/li\u003e\n\u003cli\u003eThree-pole design supports balanced protection across all three phases in commercial and industrial installations\u003c\/li\u003e\n\u003cli\u003e600V maximum voltage rating suitable for common industrial power distribution environments\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTypical use cases\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eMaintenance: swap in a new breaker to restore reliable protection without reconfiguring the panel\u003c\/li\u003e\n\u003cli\u003eRetrofit: upgrade legacy installations that were originally configured for 400A, 3-Pole, 600V protection\u003c\/li\u003e\n\u003cli\u003eReplacement: quickly replace an aging or failed breaker with an exact spec match to maintain system integrity\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecifications at a glance\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eAmperage: 400A\u003c\/li\u003e\n\u003cli\u003ePoles: 3-Pole\u003c\/li\u003e\n\u003cli\u003eVoltage: 600V\u003c\/li\u003e\n\u003cli\u003ePart number: MEF436LI\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNotes: Confirm fit and ratings before ordering. The part number MEF436LI is the best reference for compatibility with your panel and electrical system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426345373858,"sku":"MEF436LI","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-mef436li-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}