{"product_id":"md3400w-circuit-breaker","title":"MD3400W | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the MD3400W Circuit Breaker — a purpose-built, industrial-grade protective device engineered for reliability in demanding environments. With a 400A rating, 3-pole configuration, and 600V operating capability, this breaker is purposefully designed for maintenance, retrofit, and replacement projects where exact specifications matter and downtime isn’t an option.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference:\u003c\/strong\u003e MD3400W\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the MD3400W for your workflow\u003c\/h3\u003e\n\u003cp\u003eWhen your goal is to restore or upgrade an industrial distribution path without surprises, the MD3400W delivers. It’s purpose-built to slot into systems that require a precise 400A, three-pole, 600V protection device. Its industrial-grade construction helps safeguard critical equipment and personnel, while its exact specifications reduce compatibility risk during retrofits and replacements.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and lifecycle replacement in manufacturing lines, processing plants, and commercial fleets with 400A, 3-Pole, 600V circuits\u003c\/li\u003e \u003cli\u003eRetrofit projects where upgrading panel protection demands exact spec matching to existing bus, terminals, and trip pathways\u003c\/li\u003e \u003cli\u003eReplacement of failed or aging breakers in legacy systems that rely on a 3-pole, 600V protective device\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow to verify compatibility and install safely\u003c\/h3\u003e\n\u003cp\u003eTo ensure a smooth replacement or retrofit, always confirm fit and ratings before ordering. The part number MD3400W should be your primary reference for compatibility. Before installation, verify:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePanel and enclosure listings confirm 400A, 3-Pole, 600V protection is supported\u003c\/li\u003e \u003cli\u003eBus bar connections, conductor sizes, and mounting pattern align with the existing setup\u003c\/li\u003e \u003cli\u003eElectrical codes and safety procedures are followed, including lockout\/tagout and proper torque specifications from the equipment manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical notes for operators and technicians\u003c\/h3\u003e\n\u003cp\u003eThis MD3400W is more than a drop-in part — it’s a deliberate choice that aligns with your system’s protection strategy. By choosing the exact MD3400W reference, you minimize guesswork, reduce installation risk, and maintain consistent protection across your electrical distribution. Keep the manufacturer’s guidelines handy, and document the replacement with the same level of care you apply to other critical safety components.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46426457637026,"sku":"MD3400W","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\/md3400w-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}