{"product_id":"eaton-3mfs400rt-400a-120-240v-fuse-switch","title":"Eaton 3MFS400RT - 400A, 120\/240V, Fuse Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton 3MFS400RT is a rugged 400A fuse switch designed to deliver reliable on\/off isolation and precise overcurrent protection in demanding industrial and commercial environments. Built to stand up to demanding duty, this switch provides a clear, hands-on method to disconnect power and protect critical circuits when it matters most.\u003c\/p\u003e \u003ch3\u003eKey advantages\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e400 Ampere rating\u003c\/strong\u003e supports high-load applications, including motor circuits and heavy equipment feeds.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e120\/240V operation\u003c\/strong\u003e fits common US electrical systems, enabling straightforward integration into existing panel layouts.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOn\/off isolation\u003c\/strong\u003e provides a simple, secure way to de-energize systems for maintenance, service, or emergency shutdowns.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOvercurrent protection\u003c\/strong\u003e helps shield wiring and equipment from short circuits and overloads, reducing downtime and repair costs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact, maintainable design\u003c\/strong\u003e is ideal for panelboards and spaces where space is at a premium, without sacrificing accessibility or serviceability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for industrial and commercial use\u003c\/strong\u003e—well-suited for motor disconnects, branch circuit protection, and panelboard integration where a robust fusible switch is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor disconnects in manufacturing lines, pumps, conveyors, and HVAC drives where rapid isolation is essential for maintenance and safety.\u003c\/li\u003e \u003cli\u003ePanelboard installations that require a compact, maintainable switching solution with built-in protection.\u003c\/li\u003e \u003cli\u003eBranch circuit protection in commercial facilities, processing plants, and light industrial environments needing dependable performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 3MFS400RT\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120\/240V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose this fuse switch\u003c\/h3\u003e\n\u003cp\u003eThe Eaton 3MFS400RT stands out through its combination of high-current capability and practical, space-conscious design. It’s built to endure industrial use, offering dependable power isolation when technicians need to service equipment or perform routine maintenance. By integrating seamlessly with panelboards and branch circuits, it helps streamline electrical protection strategies, making it easier to manage risk, reduce unplanned downtime, and keep facilities running smoothly.\u003c\/p\u003e \u003ch3\u003ePractical tips for deployment\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePlan for clear access to the switch handle during routine maintenance to minimize downtime.\u003c\/li\u003e \u003cli\u003eCoordinate with your protection scheme to ensure the 3MFS400RT aligns with upstream fusing and downstream loads.\u003c\/li\u003e \u003cli\u003eDocument the 400A rating and 120\/240V capability in your electrical one-line drawings for future serviceability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default","offer_id":46390272065698,"sku":"3MFS400RT","price":6291.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/fusible_disconnect_generic_99df68ce-28d6-418b-9b3f-97f9d765c1de.png?v=1765367547","url":"https:\/\/www.ampstate.com\/products\/eaton-3mfs400rt-400a-120-240v-fuse-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}