{"product_id":"square-d-999290-circuit-breaker","title":"Square D | 999290 | Circuit Breaker | 90A | 2-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D 999290 circuit breaker—a dependable, high-capacity protection device designed for demanding electrical installations. With a 90-amp rating and two-pole configuration, this breaker is built to safely interrupt current on dual-hot circuits and accommodate higher-voltage systems up to 600V. Ideal for maintenance, retrofit, and replacement projects where exact compatibility matters.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 90 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 999290\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e Confirm fit and ratings before ordering. Part number is the best reference for compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Square D breaker stands out\u003c\/h3\u003e\n\u003cp\u003eThe 2-pole design protects two hot legs with a common trip, ensuring simultaneous disconnect in the event of a fault. Its 90A capacity makes it suitable for feeder protection and motor circuits in commercial or industrial panels, while the 600V rating provides headroom for higher-voltage distribution environments. This is a purpose-built replacement part that aligns with Square D panels and accessories, helping you keep systems up to date without unnecessary rewiring.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing an existing 999290 or compatible Square D circuit breaker in maintenance or upgrade projects\u003c\/li\u003e\n\u003cli\u003eRetrofits where higher current protection is required for feeders or motors\u003c\/li\u003e\n\u003cli\u003eProtection of two-hot-leg circuits in 120\/240V or higher-voltage panel configurations\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse the part number 999290 as the primary reference when checking panel compatibility.\u003c\/li\u003e\n\u003cli\u003eEnsure your panel is rated for 600V operation and accepts 2-pole breakers of this size.\u003c\/li\u003e\n\u003cli\u003eFollow standard electrical safety practices and torque specifications provided by your panel manufacturer during installation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for decision-makers\u003c\/h3\u003e\n\u003cp\u003eWhen evaluating protection options for a retrofit or replacement project, this Square D 999290 offers a robust combination of current capacity (90 A), dual-pole protection, and a 600V rating, making it suitable for a range of commercial and light-industrial applications. If the goal is reliable fault interruption on both hot legs with a known, verifiable part reference, this breaker aligns with the common Square D ecosystem and helps maintain system consistency across panels and devices.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427302297762,"sku":"999290","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-999290-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}