{"product_id":"blue-sea-5121-400a-class-t-fuse","title":"Blue Sea 5121 400A Class T Fuse","description":"\u003ch2\u003eBlue Sea 5121 — 400A Class T Fuse (A3T)\u003c\/h2\u003e\u003cp\u003e400A Class T fuse for large inverter installations — MultiPlus 12\/3000, oversized 3000W+ inverter banks, or builds with significant headroom planned for future expansion.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400A continuous rating\u003c\/strong\u003e — sized for 3500W-4000W inverter installations at 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass T fuse class\u003c\/strong\u003e — fastest-acting high-current fuse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA3T form factor\u003c\/strong\u003e — fits \u003ca href=\"\/products\/blue-sea-5502100-class-t-fuse-block\"\u003eBlue Sea 5502100\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e200,000 AIC\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhich Fuse Size Do You Need?\u003c\/h3\u003e\u003cp\u003eRule of thumb: inverter continuous watts × 1.5 ÷ 12V = minimum fuse amperage. So:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2000W inverter → 250A fuse\u003c\/li\u003e\n\u003cli\u003e3000W inverter → 375A fuse (use 400A or 300A depending on install margin)\u003c\/li\u003e\n\u003cli\u003e3600W+ inverter → 400A fuse\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhen in doubt, size up. A larger fuse will still protect the cable if properly matched to cable ampacity.\u003c\/p\u003e\n\u003ch3\u003ePairs Well With\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/blue-sea-5502100-class-t-fuse-block\"\u003eBlue Sea 5502100 Class T Fuse Block\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/inverters\"\u003e3000W+ inverters (Samlex PST-3000 \/ Xantrex Freedom SW3012)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/renogy-12v-300ah-mini-lithium-battery\"\u003eRenogy 12V 300Ah Mini Lithium Battery\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/renogy-100a-300a-busbar\"\u003eRenogy Bus Bar (high-current distribution)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help sizing or wiring?\u003c\/strong\u003e Use our \u003ca href=\"\/pages\/power-station-size-calculator\"\u003ePower Calculator\u003c\/a\u003e to size your battery bank, then the \u003ca href=\"\/pages\/system-build-helper\"\u003eSystem Build Helper\u003c\/a\u003e to plan the full install.\u003c\/p\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":51785459073156,"sku":"5121","price":97.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0996\/3968\/9348\/files\/19028XL.jpg?v=1776879265","url":"https:\/\/trailvault.co\/products\/blue-sea-5121-400a-class-t-fuse","provider":"TrailVault","version":"1.0","type":"link"}