{"product_id":"square-d-fa14090b","title":"Square D FA14090B 90A 1-Pole 277 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D FA14090B, a purpose-built 90A, 1-Pole 277V circuit breaker engineered for commercial and light-industrial panels. This FA-series device interrupts overcurrent on a single hot conductor in 277-volt distribution systems, protecting wiring, devices, and lighting circuits from faults or overloads. Part Number FA14090B ensures you’re selecting the exact unit needed for precise panel compatibility and reliable performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating: 90 amperes\u003c\/strong\u003e — provides robust protection for high-demand branch circuits commonly found in commercial lighting and power feeds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole configuration: 1-pole\u003c\/strong\u003e — dedicated protection for a single circuit within a panel, with straightforward replacement where FA-series breakers are supported.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating: 277 V\u003c\/strong\u003e — optimized for commercial overhead lighting and distribution environments, distinct from typical residential 120\/240V circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e — designed to fit Square D panels that accept FA-series breakers; confirm panel compatibility before replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWho it’s for\u003c\/strong\u003e: building managers, electricians, and facility technicians responsible for 277-volt circuits in offices, retail spaces, schools, and warehouses. The FA14090B delivers dependable branch-circuit protection, helping to prevent heat buildup and potential equipment damage when faults occur.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy this matters\u003c\/strong\u003e: unlike generic substitutes, this breaker aligns with Square D’s engineering standards and panel interfaces, delivering consistent trip characteristics and reliable performance in 277V systems. It’s a precise match for panels designed to house FA-series protection devices, supporting predictable maintenance and panel labeling.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical tips for use\u003c\/strong\u003e:\n- Verify that your panel accepts FA-series breakers and that FA14090B is the correct part number before installation.\n- Keep a spare FA14090B on hand for planned maintenance in facilities that rely on 277V circuits.\n- When replacing, power down the system and follow standard lockout\/tagout procedures; ensure the unit is fully seated and properly labeled on the panel schedule for future servicing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423236313250,"sku":"FA14090B","price":1082.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-fa14090b","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}