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

Blue Sea Systems 5176 is a 40A terminal fuse designed to provide ABYC-compliant DC main circuit protection for large battery banks with a clear window for instant blown-fuse visual checks.

This compact terminal fuse is engineered for marine and mobile battery systems where high interrupt rating and ignition protection matter. With a light-blue body, visual inspection window, and a 10,000 AIC interrupt rating at 14V DC, the 5176 meets ABYC requirements for protecting main DC circuits on larger battery banks. It’s intended for use with the matching terminal fuse blocks rather than direct battery mounting, giving installers a safer, code-compliant method to add overcurrent protection.

How does the terminal fuse protect my battery bank?

The 5176 interrupts excessive current before wiring or connected equipment sustain damage, thanks to a high interrupt rating and reliable fuse element. It clears faults quickly while remaining stable during normal loads, reducing the risk of fire or equipment loss from sustained short circuits.

• 40 amp continuous rating for DC main circuits
• 10,000 AIC at 14V DC for fast, high-energy fault interruption
• Light-blue housing with clear window for easy blown-fuse identification
• Ignition-protected design for safe installation aboard gasoline-powered boats

Where and how should I install this fuse?

The 5176 must be mounted in an approved terminal fuse block (PN 5191 or PN 2151) and not attached directly to battery posts. Using the specified blocks ensures correct mechanical support, rated current paths, and compliance with marine wiring standards.

• Use only terminal fuse blocks PN 5191 or PN 2151 with this fuse
• Do not mount the fuse directly to the battery terminal
• Install in a dry, accessible location for visual inspection through the window
• Follow ABYC and vessel wiring best practices for conductor sizing and routing

What are the key safety and performance features?

Designed for marine environments, the 5176 combines a high interrupt capacity with ignition protection and a visible indicator to simplify maintenance. The form factor and materials keep the fuse reliable under vibration and typical vessel conditions.

• 10,000 AIC rating satisfies ABYC DC main circuit protection requirements
• Ignition-protected housing suitable for gasoline-powered boats
• Clear inspection window reveals blown condition without disassembly
• Compact package dimensions: 8.128 cm L x 3.81 cm W x 2.032 cm H

How do I choose the right fuse for my system?

Match the fuse amperage to the protected circuit and confirm the fuse’s interrupt rating meets or exceeds potential fault current at the installation point. For terminal-style protection, ensure you select compatible terminal fuse blocks and consider wiring size, equipment limits, and ABYC guidance when specifying protection.

• Select 40A when circuit load and downstream device ratings match
• Verify 10,000 AIC exceeds available fault current at the battery bank
• Pair with PN 5191 or PN 2151 terminal fuse block for correct mounting
• Confirm conductor ampacity and vessel wiring standards compliance

Who is this for: The Blue Sea Systems 5176 40A terminal fuse is for marine electricians, boat owners, and mobile power integrators needing ABYC-compliant DC main protection for larger battery banks. It suits installations that require ignition-protected hardware, visible blown-fuse indication, and a high interrupt rating when paired with the correct terminal fuse block.