{"product_id":"fa34045-square-d-molded-case-circuit-breakers-i-line-style-plug-in-45-amp-3-pole-480-v","title":"Square D FA34045 Molded Case Circuit Breaker – 45A 3-Pole 480V I-Line Plug-In | 18kAIC","description":"\u003ch2\u003eSquare D FA34045 – 45 Amp Molded Case Circuit Breaker | I-Line Plug-In | 3-Pole | 480V | 18kAIC\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSquare D FA34045\u003c\/strong\u003e is a \u003cstrong\u003ethermal-magnetic molded case circuit breaker (MCCB)\u003c\/strong\u003e engineered for reliable overcurrent and short-circuit protection in industrial and commercial power distribution systems. With a \u003cstrong\u003e45-amp rating, 3-pole configuration, and 480VAC voltage rating\u003c\/strong\u003e, this breaker is a proven performer in demanding electrical environments.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is the Square D FA34045?\u003c\/h2\u003e\n\n\u003cp\u003eThe FA34045 belongs to Square D's \u003cstrong\u003eFA-frame series\u003c\/strong\u003e — a compact, high-performance line of molded case circuit breakers designed for use in \u003cstrong\u003eI-Line panelboards and switchboards\u003c\/strong\u003e. It features \u003cstrong\u003eplug-in I-Line style connections\u003c\/strong\u003e, allowing for fast, tool-free installation and replacement in compatible Square D I-Line panels.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D (Schneider Electric)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e FA34045\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmpere Rating:\u003c\/strong\u003e 45A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 480VAC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupting Rating:\u003c\/strong\u003e 18,000 AIC (18kAIC) at 480V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrip Type:\u003c\/strong\u003e Thermal-Magnetic (LI – Long-Time \u0026amp; Instantaneous)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e I-Line Style Plug-In\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e FA Frame\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e UL Listed, NEMA rated\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003ch3\u003eThermal-Magnetic Trip Mechanism\u003c\/h3\u003e\n\u003cp\u003eThe FA34045 uses a \u003cstrong\u003edual-function LI trip unit\u003c\/strong\u003e — combining \u003cem\u003elong-time delay\u003c\/em\u003e for overload protection and \u003cem\u003einstantaneous trip\u003c\/em\u003e for short-circuit response. This ensures both equipment and wiring are protected against sustained overloads and sudden fault currents.\u003c\/p\u003e\n\n\u003ch3\u003eI-Line Plug-In Connection\u003c\/h3\u003e\n\u003cp\u003eDesigned exclusively for \u003cstrong\u003eSquare D I-Line panelboards\u003c\/strong\u003e, the plug-in design eliminates the need for separate lugs or bolt connections. Breakers can be installed and replaced quickly, reducing downtime during maintenance or upgrades.\u003c\/p\u003e\n\n\u003ch3\u003e18kAIC Interrupting Capacity\u003c\/h3\u003e\n\u003cp\u003eWith an \u003cstrong\u003e18,000 ampere interrupting capacity at 480V\u003c\/strong\u003e, the FA34045 safely interrupts fault currents in most light commercial and industrial applications without damage to the breaker or panel.\u003c\/p\u003e\n\n\u003ch3\u003e3-Pole Design for 3-Phase Systems\u003c\/h3\u003e\n\u003cp\u003eThe 3-pole configuration provides simultaneous protection on all three phases of a 480VAC three-phase system — the standard for motors, HVAC equipment, compressors, and industrial machinery.\u003c\/p\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMotor branch circuit protection (up to 45A)\u003c\/li\u003e\n  \u003cli\u003eHVAC and refrigeration equipment\u003c\/li\u003e\n  \u003cli\u003eIndustrial machinery and manufacturing lines\u003c\/li\u003e\n  \u003cli\u003eCommercial building electrical distribution panels\u003c\/li\u003e\n  \u003cli\u003eReplacement in existing Square D I-Line switchboards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIs the FA34045 Compatible with My Panel?\u003c\/h2\u003e\n\u003cp\u003eThe Square D FA34045 is compatible with \u003cstrong\u003eSquare D I-Line style panelboards and load centers\u003c\/strong\u003e that accept FA-frame plug-in breakers. Always verify your panel's bus rating, frame compatibility, and available space before installation. Consult your panel's nameplate or Square D documentation for approved breaker types.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Alpha Brokers \u0026amp; Controls?\u003c\/h2\u003e\n\u003cp\u003eWe specialize in \u003cstrong\u003enew, surplus, and hard-to-find circuit breakers\u003c\/strong\u003e from top manufacturers including Square D, Eaton, Siemens, and GE. Our inventory is inspected and verified before shipping. Whether you need a direct replacement or sourcing support for obsolete equipment, we're here to help.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat does FA34045 mean?\u003c\/h3\u003e\n\u003cp\u003eIn Square D's naming convention: \u003cstrong\u003eFA\u003c\/strong\u003e = FA frame series, \u003cstrong\u003e3\u003c\/strong\u003e = 3-pole, \u003cstrong\u003e4\u003c\/strong\u003e = 480V voltage class, \u003cstrong\u003e045\u003c\/strong\u003e = 45-amp rating. The \"I-Line\" suffix indicates the plug-in bus connection style.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the interrupting rating of the FA34045?\u003c\/h3\u003e\n\u003cp\u003eThe FA34045 has an interrupting rating of \u003cstrong\u003e18,000 AIC (18kAIC) at 480VAC\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCan the FA34045 be used in a Square D QO or Homeline panel?\u003c\/h3\u003e\n\u003cp\u003eNo. The FA34045 is designed specifically for \u003cstrong\u003eSquare D I-Line style panelboards\u003c\/strong\u003e. It is not compatible with QO or Homeline residential panels, which use different frame and bus designs.\u003c\/p\u003e\n\n\u003ch3\u003eIs this breaker UL Listed?\u003c\/h3\u003e\n\u003cp\u003eYes. The Square D FA34045 is \u003cstrong\u003eUL Listed\u003c\/strong\u003e and manufactured to NEMA and ANSI standards for molded case circuit breakers.\u003c\/p\u003e\n\n\u003ch3\u003eWhat trip type does the FA34045 use?\u003c\/h3\u003e\n\u003cp\u003eThe FA34045 features a \u003cstrong\u003ethermal-magnetic LI trip unit\u003c\/strong\u003e, providing long-time (overload) and instantaneous (short-circuit) protection.\u003c\/p\u003e","brand":"Square D \/ Schneider Electric","offers":[{"title":"New","offer_id":48396207292664,"sku":"FA34045-N","price":497.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1209\/3176\/files\/FA34035-2T.jpg?v=1778795181","url":"https:\/\/alphabreakersandcontrols.com\/products\/fa34045-square-d-molded-case-circuit-breakers-i-line-style-plug-in-45-amp-3-pole-480-v","provider":"Alpha Breakers \u0026 Controls","version":"1.0","type":"link"}