{"product_id":"square-d-994340-circuit-breaker","title":"Square D | 994340 | Circuit Breaker | 40A | 3-Pole | 480V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D 994340\u003c\/strong\u003e circuit breaker is a purpose-built, high-reliability solution for demanding 3‑phase, 480V electrical systems. Designed for maintenance, retrofit, and replacement projects, this 40A, 3‑pole bolt‑on unit delivers precise protection where it matters most in commercial and industrial panels.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3‑Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt‑On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference number:\u003c\/strong\u003e 994340\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this Square D breaker stands out:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrongexact compatibility with square d panels\u003e—the 994340 part number is the most reliable reference for matching form, fit, and electrical characteristics in 3‑phase, 480V systems.\u003c\/strongexact\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration‑resistant connection in compatible enclosures, helping maintain consistent protection in busy industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustry-ready 3‑pole design\u003c\/strong\u003e delivers coordinated protection across all three phases, essential for balanced 3‑phase loads and equipment protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh‑voltage capability\u003c\/strong\u003e tuned for 480V applications, making it suitable for manufacturing lines, data centers, and other heavy‑duty installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePractical for replacements and retrofits\u003c\/strong\u003e when upgrading or restoring panels that require precise specs and a reliable, known‑brand component.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use cases:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or outdated breaker in 480V, 3‑phase industrial panels.\u003c\/li\u003e \u003cli\u003eRetrofit projects where the exact Square D 994340 specification is required to maintain panel compatibility.\u003c\/li\u003e \u003cli\u003eMaintenance outages that demand quick, straightforward substitutions with minimal panel modification.\u003c\/li\u003e \u003cli\u003eSpare parts stocking for service teams managing Square D electrical infrastructure in commercial facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eInstallation and procurement tips:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm \u003cstrong\u003efit and ratings\u003c\/strong\u003e before ordering—the part number 994340 is your best reference for compatibility with your Square D panel.\u003c\/li\u003e \u003cli\u003eEnsure the panel and associated bus architecture are rated for \u003cstrong\u003e480V\u003c\/strong\u003e and support a \u003cstrong\u003e3‑pole\u003c\/strong\u003e bolt‑on breaker of 40A capacity.\u003c\/li\u003e \u003cli\u003eFollow standard electrical safety practices during replacement, including de‑energizing the equipment and verifying no residual voltage on the bus before installation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompared to generic substitutes, this Square D unit provides a purpose‑built solution that aligns with existing Square D panels, reducing mismatch risk and installation guesswork. If you’re upgrading or replacing in a 480V, 3‑phase environment, the 994340 bolt‑on breaker is engineered to meet the reliability expectations of industrial applications while simplifying maintenance and service workflows.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427302559906,"sku":"994340","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-994340-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}