{"product_id":"lb3400sk-circuit-breaker","title":"LB3400SK | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eLB3400SK Industrial Circuit Breaker — 400A, 3-Pole, 600V\u003c\/strong\u003e is a rugged, mission-ready protection device designed for maintenance, retrofit, and replacement projects where exact specifications matter. Built for demanding industrial environments, this 3-Pole breaker delivers dependable overload and short-circuit protection to keep critical electrical systems running smoothly.\u003c\/p\u003e \u003cp\u003eKey specifications at a glance:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A — capable of safeguarding heavy-load circuits common in manufacturing floors, machine rooms, and large equipment feeds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole — ideal for three-phase distribution on industrial panels and power systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V — designed for standard industrial networks and equipment rated for high-voltage operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number reference:\u003c\/strong\u003e LB3400SK — the most reliable indicator of compatibility with your existing equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this LB3400SK matters in real-world use:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance and Retrofit readiness:\u003c\/strong\u003e When upgrading panels or replacing aging protection devices, this breaker can restore protective performance without a complete panel redesign.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplacement with confidence:\u003c\/strong\u003e Matching the exact part number minimizes fit issues, reduces downtime, and keeps spare parts readily available for upcoming maintenance windows.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility signal:\u003c\/strong\u003e The 400A, 3-Pole, 600V specifications align with common industrial configurations, making it a practical choice for both new installations and systematic upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical considerations for installation and use:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eVerify fit and ratings before ordering:\u003c\/strong\u003e Rely on the LB3400SK part number as the primary compatibility reference to ensure seamless replacement in your panel or distribution setup.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProfessional installation recommended:\u003c\/strong\u003e Have a qualified electrician confirm the breaker type, mounting method, and wiring configuration to maintain system safety and warranty compliance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlan for maintenance uptime:\u003c\/strong\u003e Consider keeping a spare LB3400SK on hand to shorten maintenance windows and reduce production interruptions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal applications include industrial control panels, manufacturing lines, and distribution enclosures that demand high-current protection and reliable performance. If you’re upgrading from older protection devices or replacing a worn-out breaker, the LB3400SK offers a precise, drop-in option that preserves your electrical architecture while delivering robust protection for critical loads. By sticking to the exact part number and matching the 400A, 3-Pole, 600V specifications, you can achieve a smooth, predictable upgrade path with fewer surprises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46426221609122,"sku":"LB3400SK","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/lb3400sk-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}