Blue Sea Systems 5176 40A Battery Terminal Fuse — light-blue, ignition‑protected, 10,000 AIC

The Blue Sea Systems 5176 is a 40A battery terminal fuse designed to provide ABYC-compliant DC main protection for large battery banks when installed in the correct terminal fuse block.

Built for marine and mobile power applications, this light-blue 40-amp terminal fuse offers a high interrupt capacity and a visible blown-indicator window. It is ignition-protected for safe use aboard gasoline-powered boats and engineered to meet ABYC requirements for DC main circuit protection when paired with the recommended terminal fuse blocks.

How does this fuse protect my large battery bank?

The 5176 terminal fuse interrupts fault currents to prevent wiring and component damage in heavy-duty DC systems. With a 10,000 AIC (at 14 VDC) interrupt rating, it can safely clear high short-circuit currents typical of large battery installations when properly mounted in an approved fuse block.

• 40 amp continuous rating for typical DC main loads
• 10,000 AIC at 14 VDC meets ABYC DC main protection guidelines
• Clear window offers quick visual verification of a blown fuse
• Must be used only with compatible terminal fuse blocks (PN 5191 or PN 2151)

Can I install the 5176 directly on a battery terminal?

No — the 5176 is a terminal fuse and must be mounted in a compatible terminal fuse block rather than clamped directly to a battery post. Using a proper fuse block ensures secure electrical connection, correct mechanical support, and compliance with safety standards.

• Required fuse blocks: PN 5191 or PN 2151
• Avoid direct battery-terminal mounting to prevent unreliable contacts
• Fuse block provides appropriate spacing and insulation for marine use

Is this fuse safe for gasoline-powered boats and tight spaces?

The 5176 is ignition-protected, making it suitable for installation aboard gasoline-powered vessels where spark suppression is necessary. Its compact package dimensions allow installation in confined fuse panels or electrical compartments when paired with the correct block.

• Ignition-protected design reduces spark risk during operation
• Compact dimensions: 8.128 cm L x 3.81 cm W x 2.032 cm H for space-conscious installations
• Color-coded light-blue body simplifies amperage identification

What maintenance and inspection steps should I follow?

Regular inspection helps ensure continued protection: visually check the clear window for a blown element, confirm tight connections at the fuse block, and replace fuses with the exact Blue Sea 5176 40A part when needed. Avoid substituting non-approved fuse types or mounting methods.

• Inspect clear window for blown condition during routine checks
• Verify secure connections and corrosion-free terminals at the fuse block
• Replace only with the same Blue Sea 5176 40A terminal fuse

Who is this for: The Blue Sea Systems 5176 40A terminal fuse is intended for boat owners, marine electricians, RV installers, and anyone designing or maintaining large DC battery systems who need ABYC-level DC main circuit protection. It’s especially suited to installations that require high interrupt capacity, ignition protection, and a compact, easily inspected fuse solution — provided it’s used with the recommended terminal fuse blocks for safe, code-compliant operation.