{"product_id":"square-d-fcj34090-circuit-breaker","title":"Square D | FCJ34090 | Circuit Breaker | 90A | 3-Pole | 480V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D FCJ34090 circuit breaker delivers dependable protection for 480V three-phase power systems with a precise 90A rating. Designed for maintenance, retrofit, and replacement projects, this 3-pole device fits into panels and distribution schemes that require exact compatibility and robust, reliable performance.\u003c\/p\u003e \u003cp\u003eKey features that matter in real-world electrical work:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 90A, providing strong, level protection for medium to high-load circuits without unnecessary nuisance trips in appropriate applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole configuration, ideal for three-phase power and balancing loads across all phases in industrial circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 480V, suitable for larger-scale commercial and industrial installations that run at higher line voltages.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference\u003c\/strong\u003e: FCJ34090 — using the exact part number is the most reliable way to ensure compatibility with your existing Square D equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication fit\u003c\/strong\u003e: A practical choice for replacement, retrofit, or new-install projects where maintaining precise specs is critical for panel and equipment protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy it stands out in a crowded field\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect compatibility with Square D ecosystems\u003c\/strong\u003e: When your panel or drive is built around FCJ-series components, this 90A, 3-pole unit integrates smoothly, minimizing downtime and mismatch risks.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear alignment with 480V three-phase systems\u003c\/strong\u003e: Specifically engineered for higher-voltage, three-phase environments, making it a safer, more reliable choice for demanding industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWhy the part number matters\u003c\/strong\u003e: The FCJ34090 designation serves as the best reference for cross-checking panel compatibility, mounting style, and electrical connections. Always verify the fit and ratings before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use scenarios\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed breaker in 480V, three-phase industrial panels with FCJ-series components.\u003c\/li\u003e \u003cli\u003eRetrofits in manufacturing lines upgrading protection without altering existing busbars or mounting schemes.\u003c\/li\u003e \u003cli\u003eSpare-part planning for service fleets that service large facilities with 480V distribution networks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical guidance for a smooth match\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUse the exact part number (FCJ34090) as your primary compatibility reference to avoid mismatches with mounting, terminals, or trip characteristics.\u003c\/li\u003e \u003cli\u003eBefore ordering, confirm the panel model, bus connection type, and the required amperage\/voltage ratings align with 90A, 480V, and 3-pole configuration.\u003c\/li\u003e \u003cli\u003eKeep a small reference of common three-phase protection needs on hand—this helps you decide quickly whether FCJ34090 is the right substitute during maintenance windows.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Square D FCJ34090, you gain a reliable, precisely matched circuit protection solution crafted for 480V three-phase systems. Its 90A, 3-pole design is built to support steady operation in demanding environments, helping you protect equipment, minimize downtime, and maintain system integrity across your industrial infrastructure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426382041250,"sku":"FCJ34090","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-fcj34090-circuit-breaker-90a-3-pole-480v-157.webp?v=1789567001","url":"https:\/\/www.ampstate.com\/products\/square-d-fcj34090-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}