{"product_id":"eaton-hld3400x-circuit-breaker","title":"Eaton | HLD3400X | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003eEaton HLD3400X circuit breaker is engineered for demanding 600V, three‑phase systems, delivering dependable protection when you’re performing maintenance, retrofit, or replacement work. With a 400A rating and a 3‑pole configuration, this unit is built to fit specific panel and busbar arrangements where exact specs matter, and it leverages Eaton’s rigorous design standards to keep your electrical distribution running smoothly. \u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 400A\u003c\/li\u003e \u003cli\u003ePoles: 3‑Pole\u003c\/li\u003e \u003cli\u003eVoltage: 600V\u003c\/li\u003e \u003cli\u003eReference compatibility: Part number HLD3400X is the best reference for matching equipment\u003c\/li\u003e \u003cli\u003eImportant note: Confirm fit and ratings before ordering\u003c\/li\u003e\n\u003c\/ul\u003e \u003cstrong\u003eWhy this matters for your project\u003c\/strong\u003e\n\u003cp\u003eWhen upgrading or replacing protection hardware in a 3‑phase 600V system, selecting the exact model ensures the electrical characteristics align with your existing gear. The HLD3400X is purpose‑built to slot into panels and configurations that require a 400A, 3‑pole device, helping to maintain coordinated protection and trip behavior across all phases. Using the precise part number minimizes mismatch risk and reduces the time spent on compatibility checks during installation.\u003c\/p\u003e \u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: Replace aging or failed breakers to restore reliable overcurrent protection\u003c\/li\u003e \u003cli\u003eRetrofit: Upfit existing 3‑phase distribution panels to current specifications without changing ancillary hardware\u003c\/li\u003e \u003cli\u003eReplacement: Swap out a like‑for‑like unit to maintain system continuity after maintenance outages\u003c\/li\u003e \u003cli\u003eNew installations requiring exact Eaton HLD3400X compatibility for a 600V, 3‑phase supply\u003c\/li\u003e\n\u003c\/ul\u003e \u003cstrong\u003ePractical considerations\u003c\/strong\u003e\n\u003cp\u003eTo ensure seamless integration, rely on the part number HLD3400X as the definitive reference for compatibility. Before placing an order, cross‑check your panel’s label and mounting configuration against the 3‑pole, 400A, 600V rating to avoid delays. This approach helps you achieve consistent protection performance and minimizes the risk of mismatched components in critical electrical infrastructure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":46426465632418,"sku":"HLD3400X","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\/eaton-hld3400x-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}