{"product_id":"square-d-la36400mb-circuit-breaker","title":"Square D | LA36400MB | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D LA36400MB circuit breaker is a rugged, three-pole protection device designed for demanding industrial and commercial electrical systems. With a 400A rating and a 600V operating range, it provides reliable protection for three-phase feeders in compatible distribution panels. Built for maintenance, retrofit, and replacement projects, this unit is the precise choice when specs matter and downtime is costly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole (three-phase)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LA36400MB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest use:\u003c\/strong\u003e maintenance, retrofit, and replacement in panels that accept LA-series breakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility tip:\u003c\/strong\u003e Confirm fit and ratings before ordering—the LA36400MB part number is the most reliable reference for compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho benefits most: facility engineers, electrical contractors, and maintenance teams who manage mid-to-large scale distribution panels in manufacturing, commercial buildings, or data-center environments. When a panel requires a precise 400A, 3-pole, 600V device, the LA36400MB delivers a straightforward, drop-in solution that minimizes guesswork and installation time.\u003c\/p\u003e \u003cp\u003eFunctional insights and practical notes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eDesigned to protect three-phase circuits from overloads and short circuits, helping maintain critical equipment uptime.\u003c\/li\u003e \u003cli\u003eIdeal for retrofitting older panels to modern protection standards without changing downstream wiring or panel hardware.\u003c\/li\u003e \u003cli\u003eUse this part number to ensure you’re selecting a genuine Square D component, preserving panel ratings and manufacturer compatibility.\u003c\/li\u003e \u003cli\u003eBefore purchase, audit panel labeling and service requirements to confirm that a 400A, 3-pole, 600V device aligns with your system’s specifications.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoosing this model means leaning into the reliability of Square D for robust electrical protection in applications where precise matching matters. If your project calls for a 400A, 3-pole, 600V breaker with a clear, verifiable part reference, the LA36400MB is designed to meet those exacting criteria and keep your electrical distribution running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427248689314,"sku":"LA36400MB","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-la36400mb-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}