{"product_id":"square-d-fa340901021-circuit-breaker","title":"Square D | FA340901021 | Circuit Breaker | 3-Pole | Plug-In","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FA340901021—a 3-pole plug-in circuit breaker crafted for dependable protection of three-phase electrical systems. Designed for maintenance, retrofit, and replacement, this unit is built to align with your panel’s exact specifications when you rely on the FA340901021 part number as the compatibility reference.\u003c\/p\u003e \u003cp\u003eWhy this breaker stands out:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole (3‑phase) design\u003c\/strong\u003e tailored for three-phase distribution, delivering balanced protection across all conductors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug‑in installation\u003c\/strong\u003e enables quick, field-friendly replacements in compatible Square D panels, reducing downtime during service or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number accuracy\u003c\/strong\u003e FA340901021 is the definitive reference for compatibility—useful for cross‑checking panels, catalogs, and spare inventories.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile use cases\u003c\/strong\u003e ideal for panel maintenance, retrofit projects, and stocking reliable spares to minimize disruption when components need replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and practical scenarios\u003c\/h3\u003e\n\u003cp\u003eIn industrial facilities, commercial electrical rooms, or equipment rooms, this 3-pole plug-in breaker protects three-phase motors, conveyors, and other three-phase loads. When upgrading or replacing aging protection, using the exact FA340901021 part ensures proper fit and reliable tripping behavior, helping maintain safety and uptime without the guesswork of aftermarket substitutions.\u003c\/p\u003e \u003ch3\u003eHow to verify compatibility\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eCross-reference the part number FA340901021 with your panel catalog to confirm plug-in suitability.\u003c\/li\u003e \u003cli\u003eCompare required electrical ratings (current rating, voltage, and interrupting capacity) to your system’s specifications before ordering.\u003c\/li\u003e \u003cli\u003eEnsure your panel accepts plug-in 3-pole breakers of Square D design to guarantee a proper mechanical fit and electrical performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecs at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePoles: 3-Pole\u003c\/li\u003e \u003cli\u003eMounting: Plug-In\u003c\/li\u003e \u003cli\u003ePart number: FA340901021\u003c\/li\u003e \u003cli\u003eBrand: Square D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427225227426,"sku":"FA340901021","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-fa340901021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}