{"product_id":"square-d-lhf3640030dc-circuit-breaker","title":"Square D | LHF3640030DC | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D \u003cstrong\u003eLHF3640030DC\u003c\/strong\u003e circuit breaker is built for demanding electrical environments that rely on robust, reliable protection for 600V circuits. With a 400A rating and 3-pole configuration, this device is purpose-built for three-phase systems that require precise, dependable overcurrent protection in maintenance, retrofit, and replacement projects.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference:\u003c\/strong\u003e Part number LHF3640030DC\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned to slide into existing Square D installations where matching specs are essential, this breaker helps minimize downtime and compatibility risks during upgrades or service work. Its three-pole design ensures balanced protection across all phases, helping to safeguard wiring, motors, and other equipment from overcurrent conditions in industrial and commercial panels.\u003c\/p\u003e \u003ch3\u003eWhy this model stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike generic substitutes, the LHF3640030DC is chosen for scenarios where exact specifications matter. It’s ideal for:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMaintenance: keep your distribution panel protected and compliant during routine servicing.\u003c\/li\u003e \u003cli\u003eRetrofit: upgrade or modernize systems while preserving original panel compatibility.\u003c\/li\u003e \u003cli\u003eReplacement: swap in a proven, same-spec unit when a previously installed breaker reaches end of life.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch4\u003ePractical considerations and getting it right\u003c\/h4\u003e\n\u003cp\u003eBefore ordering, verify fit and ratings to ensure seamless integration with your panel. The part number \u003cstrong\u003eLHF3640030DC\u003c\/strong\u003e is the best reference for compatibility, so keep it on hand for future purchases and parts replacements.\u003c\/p\u003e \u003cp\u003eIdeal for electrical professionals and maintenance teams managing 3-phase, high-load applications, this Square D circuit breaker helps you protect critical equipment, reduce disruption, and maintain safe, reliable operation in both retrofit projects and ongoing service life.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eUse cases at a glance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtecting 3-phase equipment in 600V systems\u003c\/li\u003e \u003cli\u003eReplacing aging or damaged breakers with an exact-spec unit\u003c\/li\u003e \u003cli\u003eUpgrading protection in retrofit installations while preserving panel integrity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426350485666,"sku":"LHF3640030DC","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-lhf3640030dc-circuit-breaker-400a-3-pole-600v-989.webp?v=1789561487","url":"https:\/\/www.ampstate.com\/products\/square-d-lhf3640030dc-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}