{"product_id":"blue-sea-systems-5191-fuse-block-terminal-30-300a-battery-post-mount","title":"Blue Sea Systems 5191 Fuse Block Terminal 30-300A | Battery Post Mount","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eDesigned for demanding marine electrical systems, the Blue Sea Systems 5191 fuse block terminal delivers robust protection in a compact form factor. It mounts to a 3\/8\\\" battery post and accepts MRBF fuses from 30A to 300A, offering flexible protection for high-current DC circuits such as main feeders, inverters, windlasses, and bow thrusters.\u003c\/p\u003e\n\u003cp\u003eThe unit is built to withstand open cockpit environments and other harsh marine conditions, featuring a weatherproof body and an insulating cap that helps prevent accidental shorts during maintenance. When used with MRBF fuses, the fuse block can be ignition-protected, adding a safety-focused option for ignition-prone installations. Fuses are sold separately, and the block carries a universal fit for a range of configurations.\u003c\/p\u003e\n\u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVoltage max operating: 58V DC\u003c\/li\u003e\n\u003cli\u003eAmps max operating per block: 300A\u003c\/li\u003e\n\u003cli\u003eTerminal fuses: 30A–300A\u003c\/li\u003e\n\u003cli\u003eTerminal stud size: 5\/16\\\"-18 (8 mm)\u003c\/li\u003e\n\u003cli\u003eMounting hole size: 3\/8\\\" (MN10)\u003c\/li\u003e\n\u003cli\u003eMounting type: battery post mount, single 5\/16\\\" stud for wire connections\u003c\/li\u003e\n\u003cli\u003eInsulating cap helps prevent shorts during service\u003c\/li\u003e\n\u003cli\u003eIgnition protected when used with MRBF fuses\u003c\/li\u003e\n\u003cli\u003eFuses sold separately\u003c\/li\u003e\n\u003cli\u003eFit type: Universal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical applications and benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDC main protection for space-constrained boats\u003c\/li\u003e\n\u003cli\u003eProtection for inverter circuits and other high-current loads\u003c\/li\u003e\n\u003cli\u003eWindlass and bow thruster circuit protection in compact layouts\u003c\/li\u003e\n\u003cli\u003eWeatherproof design suitable for open cockpit and exposed decks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: The 5191 is designed to work with MRBF fuses and provides a dedicated connection point for organized wiring. This block is sold as a fuse block terminal without fuses.\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: What are the voltage and current limits of the 5191 fuse block?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports up to 58V DC and 300A per block, with MRBF fuses from 30A to 300A.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How is the 5191 mounted and is it weatherproof?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Mounts on a 3\/8\" battery post with a 5\/16\" stud; designed for open cockpit and harsh marine environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":53125301928047,"sku":"B0019ZBTV4","price":31.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/blue-sea-systems-5191-fuse-block-terminal.jpg?v=1779177952","url":"https:\/\/taskholt.com\/products\/blue-sea-systems-5191-fuse-block-terminal-30-300a-battery-post-mount","provider":"TaskHolt","version":"1.0","type":"link"}