{"product_id":"nan-rdf400j-3-disconnect-switch","title":"RDF400J-3 - 400A, Fused Disconnect Switch","description":"\u003cdiv\u003eThe RDF400J-3 fused disconnect switch is engineered for demanding industrial and commercial environments where safe electrical isolation and dependable performance are non-negotiable. With a robust 400A rating, this device delivers reliable disconnection under load while supporting lockout\/tagout procedures to keep maintenance teams safe. Key advantages you’ll feel in everyday operation\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400A current capacity\u003c\/strong\u003e makes the RDF400J-3 ideal for heavy feeders, large motors, and high-demand equipment without compromising safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFused disconnect design\u003c\/strong\u003e provides built-in overcurrent protection, enabling quick isolation of faults and protecting downstream circuitry from damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe lockout\/tagout compatibility\u003c\/strong\u003e facilitates compliant maintenance practices, ensuring circuits stay de-energized during service and inspections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable disconnection under load\u003c\/strong\u003e Designed to shut off power cleanly when it’s still energized, reducing arc risk and improving operator safety during routine servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable, purpose-built for busy facilities\u003c\/strong\u003e Built to withstand the rigors of industrial and commercial use, delivering long-term reliability in electrical rooms, substations, and equipment yards.\u003c\/li\u003e\n\u003c\/ul\u003e Who this is for and how it solves real-world problems\n\u003cp\u003eThe RDF400J-3 is the right choice for facilities that demand rigorous electrical isolation without sacrificing uptime. It’s well-suited for feeding large pumps, conveyors, HVAC systems, compressors, and other high-load equipment in manufacturing floors, processing plants, and commercial buildings. When maintenance crews need to work safely, a fused disconnect switch with lockout\/tagout support ensures circuits are physically isolated, preventing accidental energization and protecting personnel.\u003c\/p\u003e Why the RDF400J-3 stands out\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated protection\u003c\/strong\u003e The fused element isn’t just a breaker—it's a safeguard that helps prevent fault propagation and equipment damage, improving overall system resilience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision isolation\u003c\/strong\u003e With dependable under-load disconnection, you get predictable shutdown behavior, which simplifies maintenance planning and reduces downtime risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-friendly safety alignment\u003c\/strong\u003e The design accommodates standard lockout devices and tags, streamlining compliance with safety standards in industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e Practical use cases and quick-start guidance\n\u003cp\u003eScenario ideas to maximize the RDF400J-3’s value:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFeeding heavy machinery in a production line, where a secure isolation point is required during routine servicing.\u003c\/li\u003e\n\u003cli\u003eIsolating critical feeders in a commercial electrical room to support scheduled maintenance without affecting other loads.\u003c\/li\u003e\n\u003cli\u003eProviding a safe, compliant disconnect point for large motors and compressors that demand reliable under-load performance.\u003c\/li\u003e\n\u003c\/ul\u003e Maintenance and care notes for lasting performance\n\u003cp\u003eTo maintain peak reliability, perform regular inspections of fuse elements and terminations, verify that the lockout\/tagout provisions remain accessible and functional, and confirm that mounting and enclosure connections are secure. Routine checks help ensure the RDF400J-3 continues to deliver safe, predictable isolation and protection over time.\u003c\/p\u003e Specifications at a glance\n\u003cul\u003e\n\u003cli\u003eAmperage rating: \u003cstrong\u003e400A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct type: \u003cstrong\u003eFused Disconnect Switch\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eModel: \u003cstrong\u003eRDF400J-3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e In summary, the RDF400J-3 isn’t just a switch—it’s a safety-focused, high-capacity solution designed for the realities of industrial and commercial electrical systems. It combines robust overload protection, dependable under-load disconnection, and lockout\/tagout compatibility to help you protect personnel, equipment, and uptime. Add the RDF400J-3 to your panel, and you’ll have a reliable transfer point that supports compliant maintenance practices while delivering steady, long-term performance in demanding environments.\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default Title","offer_id":46383738454178,"sku":"RDF400J-3","price":4610.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/rdf400j-3-400a-fused-disconnect-switch-971.webp?v=1788824891","url":"https:\/\/www.ampstate.com\/products\/nan-rdf400j-3-disconnect-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}