Blue Sea Systems 5185 150A Battery Terminal Fuse — 10,000 AIC, Marine DC Main Protection

Blue Sea Systems 5185 is a 150-amp battery terminal fuse engineered to provide high-capacity DC main circuit protection for large battery banks.

This compact terminal fuse is built for marine and high-demand DC electrical systems where ABYC-level short-circuit interruption and durable connection hardware are essential. Designed to be installed with the recommended terminal fuse blocks, the 5185 delivers robust fault protection with a high interrupting capacity and is sized for battery-main circuits on large boats, work vehicles, or stationary power setups.

How does this fuse meet safety standards for large battery banks?

The 5185 is rated with a very high interrupting capacity to handle severe fault currents safely at 14 V DC, helping systems comply with ABYC guidance for DC main protection. Its construction and rating make it suitable where large battery banks could produce extremely high short-circuit currents.

• 150 amp continuous rating for primary battery circuits
• 10,000 AIC (at 14 V DC) interrupting capacity
• Engineered to protect against high-energy faults common in large banks

What installation steps and accessories are required?

The 5185 is a terminal-type fuse and is not intended to be mounted directly onto a battery post. To install correctly you must use one of Blue Sea Systems' designated terminal fuse blocks so the fuse is properly supported and insulated.

• Requires Terminal Fuse Block PN 5191 or PN 2151 for mounting
• Do not install the fuse directly on the battery terminal
• Ensure correct torque and secure connections per block instructions

What physical and electrical specs should I expect?

The unit is compact and built for heavy-duty use, with small package dimensions that make it easy to situate within a DC distribution assembly or battery compartment. Its electrical performance emphasizes high fault interruption at typical marine battery voltages.

• Nominal rating: 150 amps continuous
• Interrupting capacity: 10,000 AIC @ 14 V DC
• Compact packaging roughly 7.62 cm x 3.556 cm x 2.54 cm for easy placement

How does the 5185 compare to other battery fuses for marine use?

Compared with lower-rated fuses, the 5185 provides a much higher AIC value, which matters when battery banks can deliver very large fault currents. Its design pairs with Blue Sea's terminal fuse blocks to create a safe, serviceable DC main protection assembly preferred in professional marine installations.

• Higher interrupting capacity than typical automotive fuses
• Designed for boat and large-power installations where ABYC guidance applies
• Integrates with Blue Sea Systems fuse blocks for code-compliant setups

Who this is for: The Blue Sea Systems 5185 is intended for boat builders, marine electricians, fleet maintenance teams, and serious DIY installers who need a compact, high-interrupt-capacity fuse for battery-main protection. Choose this fuse when you have large battery banks or high-current DC systems and will install it into the recommended PN 5191 or PN 2151 terminal fuse block to meet best-practice safety and installation requirements.