{"product_id":"seaflo-300a-4-position-marine-battery-disconnect-switch-12-24-48v-waterproof-ip66-300a-continuous","title":"SEAFLO 300A 4-Position Marine Battery Disconnect Switch — 12\/24\/48V Waterproof IP66, 300A Continuous","description":"\u003cp\u003e\u003cstrong\u003eSEAFLO's 300A 4-position battery disconnect switch is a heavy-duty, waterproof selector that isolates or combines battery banks for marine, RV, automotive, and off-grid power systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact selector switch (Model SFCBS-300-402) gives you flexible battery control for 12V, 24V, and 48V DC installations. Built for harsh environments, it uses tin-plated copper studs and a one-piece terminal design to keep electrical resistance low and connections secure under vibration. With an IP66 waterproof rating and compliance to ABYC, UL 1500, and SAE J1171 standards, it’s built to last on boats, recreational vehicles, and industrial vehicles where dependable high-current switching matters.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this switch improve battery management on a boat or RV?\u003c\/h3\u003e\n\u003cp\u003eThe 4-position selector provides clear, manual control over which battery banks feed the loads. You can isolate one bank for charging, select a second bank, combine both for extra cranking power, or turn power off entirely—making maintenance and emergency starts easier and safer.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePositions: OFF \/ 1 \/ 2 \/ 1+2 for flexible routing\u003c\/li\u003e\n  \u003cli\u003eContinuous 300A rating with 500A intermittent support (5 min)\u003c\/li\u003e\n  \u003cli\u003eCranking capacity up to 900A for heavy-start demands\u003c\/li\u003e\n  \u003cli\u003eWorks with 12V, 24V, and 48V systems for multi-application use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the SEAFLO switch durable in marine or off-road conditions?\u003c\/h3\u003e\n\u003cp\u003eMaterials and construction are chosen to resist corrosion and mechanical stress. Tin-plated copper studs improve conductivity while resisting salt and moisture corrosion, and the one-piece stud design prevents loosening under vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIP66 enclosure resists powerful water jets and splashing\u003c\/li\u003e\n  \u003cli\u003eTinned copper terminals reduce oxidation and energy loss\u003c\/li\u003e\n  \u003cli\u003eRobust mounting and vibration-resistant terminal layout\u003c\/li\u003e\n  \u003cli\u003eMeets ABYC, UL 1500, and SAE J1171 safety and ignition protection standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and wire this battery selector?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone familiar with DC battery systems: mount the switch, connect the battery cables to the clearly labeled studs, and secure using the specified 3\/8\" - 16 (M10) hardware. The single-piece studs simplify termination and reduce points of failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTerminal stud: 3\/8\" - 16 (M10) for common cable lugs\u003c\/li\u003e\n  \u003cli\u003eClear 4-position selector knob for intuitive operation\u003c\/li\u003e\n  \u003cli\u003ePanel-mountable form factor for neat integration\u003c\/li\u003e\n  \u003cli\u003eCompatible with common battery cable sizes used in marine\/RV systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich electrical ratings ensure this switch handles high-current demands?\u003c\/h3\u003e\n\u003cp\u003eThe SEAFLO selector is rated for continuous heavy loads and short-term peak currents, letting it tolerate routine loads and the surge demands of engine cranking or inrush currents from inverters and chargers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous current rating: 300A\u003c\/li\u003e\n  \u003cli\u003eIntermittent rating: 500A for 5 minutes\u003c\/li\u003e\n  \u003cli\u003eCranking rating: 900A for 30 seconds\u003c\/li\u003e\n  \u003cli\u003eDesigned for 12V, 24V, and 48V DC applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This SEAFLO battery disconnect switch is aimed at boat owners, RV enthusiasts, fleet operators, and off-grid system installers who need a rugged, easy-to-operate solution for isolating or combining battery banks. Choose it if you require a high-current, vibration-resistant selector with proven marine safety compliance and waterproof protection for demanding environments.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this switch suitable for both 12V and 24V systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The SEAFLO SFCBS-300-402 supports 12V, 24V, and 48V DC systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this handle engine cranking currents?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It has a 900A cranking rating (30 sec) and 300A continuous capacity.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SEAFLO","offers":[{"title":"Default Title","offer_id":67591429750969,"sku":"B09H65X952","price":62.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/seaflo-front-panel-selector.jpg?v=1790550852","url":"https:\/\/redleafauto.ca\/products\/seaflo-300a-4-position-marine-battery-disconnect-switch-12-24-48v-waterproof-ip66-300a-continuous","provider":"Redleaf Auto","version":"1.0","type":"link"}