{"product_id":"square-d-mgp36400-circuit-breaker","title":"Square D | MGP36400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MGP36400 Circuit Breaker—a rugged solution for demanding 3‑phase power systems. With a 400A rating, 3 poles, and a 600V operating capability, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter. The MGP36400 is the right choice when you need dependable protection that keeps industrial and commercial electrical distribution running smoothly.\u003c\/p\u003e \u003cp\u003eThe MGP36400 is part of the Square D MGP lineup, designed to integrate with compatible panels and distribution gear with minimal modification. Before you order, verify fit and ratings to ensure seamless compatibility—the part number (MGP36400) is the clearest reference for matching exact equipment.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e400 A current rating\u003c\/strong\u003e provides strong protection for heavy feeder cables and main distribution paths.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e safeguards all three phases in a 3‑phase 600V system, helping maintain balance and reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V operating voltage\u003c\/strong\u003e supports industrial and commercial electrical environments where higher voltage distribution is standard.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection\u003c\/strong\u003e delivers precise overcurrent response, helping prevent damage from overloads and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRetrofit-friendly design\u003c\/strong\u003e and standard mounting\/connectivity simplify replacement in existing Square D installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility reference\u003c\/strong\u003e—confirm fit and ratings using the MGP36400 part number to avoid mismatches in panels and distribution gear.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replacing main feeders in industrial facilities with 3‑phase 600V systems.\u003c\/li\u003e \u003cli\u003eRetrofits and maintenance projects where exact 400A, 3-pole, 600V specifications are required.\u003c\/li\u003e \u003cli\u003eNew or upgraded commercial electrical rooms that rely on reliable, standardized Square D protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the MGP36400 for your electrical protection needs\u003c\/h3\u003e\n\u003cp\u003eChoosing a breaker from the Square D MGP family means you’re prioritizing consistency, reliability, and long-term availability. This unit is designed to plug into compatible panels with the same mounting footprint and connection scheme, reducing installation time and rework. With the MGP36400, you’re investing in precise protection for high-load feeders and critical equipment, helping you minimize downtime and protect valuable assets.\u003c\/p\u003e \u003cp\u003eNotes: Always confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring that your 400A, 3‑pole, 600V circuit breaker integrates smoothly with your existing Square D installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426775388322,"sku":"MGP36400","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/square-d-mgp36400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}