{"product_id":"seaflo-300a-4-position-battery-disconnect-switch-12-24-48v-heavy-duty-ip66-waterproof-tin-plated-copper-studs","title":"SEAFLO 300A 4-Position Battery Disconnect Switch – 12\/24\/48V Heavy-Duty, IP66 Waterproof, Tin-Plated Copper Studs","description":"\u003cstrong\u003eSEAFLO’s 300A 4-position battery disconnect switch is a heavy-duty selector that isolates or combines battery banks for 12V, 24V, and 48V systems with IP66 waterproof protection.\u003c\/strong\u003e\n\n\u003cp\u003eBuilt for marine, automotive, RV, off-grid and industrial setups, this selector switch (Model SFCBS-300-402) gives you secure, vibration-resistant power control. It handles continuous 300A and short-term peaks up to 900A cranking, uses tin-plated copper studs for improved conductivity and corrosion resistance, and meets common marine safety standards for reliable operation in demanding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this switch improve power control on a boat or RV?\u003c\/h3\u003e\n\u003cp\u003eThe 4-position design lets you choose between isolating a bank, sending one battery to all loads, or paralleling batteries for combined power. That flexibility lets you preserve a starter battery, prioritize charging, or boost available current when needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePositions: OFF \/ 1 \/ 2 \/ 1+2 (combine)\u003c\/li\u003e\n  \u003cli\u003eUse to isolate house and start batteries or tie them together for high-current needs\u003c\/li\u003e\n  \u003cli\u003eSelectable operation simplifies maintenance and emergency starts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it withstand saltwater spray, vibration, and heavy use?\u003c\/h3\u003e\n\u003cp\u003eYes — the switch is built with a durable one-piece terminal stud and tin-plated copper for long-term corrosion resistance. Its IP66 rating protects against powerful water jets and debris, while the robust construction resists loosening from vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIP66 waterproof enclosure for exposure to spray and washdowns\u003c\/li\u003e\n  \u003cli\u003eTinned copper studs resist corrosion in marine environments\u003c\/li\u003e\n  \u003cli\u003eOne-piece stud and rugged housing for vibration resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical ratings and compatibility should I expect?\u003c\/h3\u003e\n\u003cp\u003eThis selector supports 12V, 24V, and 48V DC systems, with a continuous rating of 300A and intermittent capacity up to 500A for five minutes. It also handles high cranking currents (900A for 30 seconds), making it suitable for engines, inverters, and heavy DC loads.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous: 300A; Intermittent: 500A (5 min); Cranking: 900A (30 sec)\u003c\/li\u003e\n  \u003cli\u003eTerminal studs: 3\/8\" - 16 (M10) for common battery cable fittings\u003c\/li\u003e\n  \u003cli\u003eCompatible with 12V, 24V, and 48V battery systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes it meet safety and regulatory marine standards?\u003c\/h3\u003e\n\u003cp\u003eThe SEAFLO selector is tested to relevant marine ignition protection and safety norms to ensure safer installation near engines and fuel systems. Certification alignment helps simplify compliance for boat and vehicle installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplies with ABYC marine guidelines\u003c\/li\u003e\n  \u003cli\u003eMeets UL 1500 and SAE J1171 ignition protection standards\u003c\/li\u003e\n  \u003cli\u003eManufactured to reduce ignition risk in demanding environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Technicians, boat owners, RVers, off-grid installers and fleet operators who need a durable, high-current battery selector that handles harsh conditions and offers flexible power management. Choose this SEAFLO 4-position switch when you require robust electrical performance, corrosion-resistant terminals, and certified safety for marine and mobile power systems.\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: Can this switch handle a boat starter and house bank together?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Use the 1+2 position to combine banks for high-current starts or separate positions to isolate them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What cable size fits the terminal studs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Terminals are 3\/8\"-16 (M10); they accept common battery lugs and heavy-gauge cables for 300A continuous service.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SEAFLO","offers":[{"title":"Default Title","offer_id":48085635891358,"sku":"B09H65X952","price":49.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/seaflo-front-panel.jpg?v=1785875791","url":"https:\/\/northtrailauto.ca\/products\/seaflo-300a-4-position-battery-disconnect-switch-12-24-48v-heavy-duty-ip66-waterproof-tin-plated-copper-studs","provider":"North Trail Auto","version":"1.0","type":"link"}