Blue Sea 2151 Terminal Fuse Block - 3/8" Mounting Hole - 2 Terminal Studs

The Blue Sea 2151 Terminal Fuse Block is a compact, high-amperage electrical protection device purpose-built for demanding marine DC systems. After years running boats through rough conditions, you know that reliable circuit protection isn't optional—it's essential for safety and equipment longevity. This 2-terminal stud configuration is engineered for main distribution, inverter circuits, windlass, bow thruster protection, and other high-current applications where space constraints and amp capacity demand a no-compromise solution.

The isolated stud design employs standard 5/16" hardware, allowing stacking of multiple terminals to expand circuit configurations without replacing the entire block. This modular approach saves installation time and cost on retrofit projects or expanded electrical systems. The compact footprint—measuring 3 x 3 x 7 inches and weighing just 0.3 lbs—fits tight engine rooms, console spaces, and below-deck compartments where traditional distribution panels won't fit. The 3/8" mounting hole ensures solid, corrosion-resistant installation on aluminum or steel bulkheads, and the fuse block's sealed construction resists salt spray and moisture intrusion common in marine environments.

Cruisers, sportfish captains, and liveaboard operators rely on Blue Sea terminal fuse blocks to protect expensive inverters, electric windlasses, and thruster circuits that demand millisecond-response protection. Whether you're upgrading an older boat's electrical architecture or building a custom marine installation, this block's proven design and industry reputation ensure your 12V or 24V DC circuits won't fail when you're miles offshore. Installation requires only basic tools and standard marine-grade wire lugs, making it suitable for professional installers and experienced boaters tackling their own projects.