Blue Sea Systems 5191 Fuse Block Terminal (30–300A) – Marine DC Power Protection

Key specifications

• Voltage max operating: 58 V DC
• Amps max per block: 300 A
• Terminal fuses: 30–300 A MRBF fuses
• Terminal stud size: 5/16"-18 (8 mm)
• Mounting hole compatibility: accepts common mounting hardware
• Weatherproof and corrosion‑resistant for harsh environments
• Insulating cap prevents accidental shorts
• Ignition protected when used with MRBF fuses
• Fuses sold separately
• Fit type: Universal

Practical applications

For boaters and vehicle enthusiasts, this fuse block provides organized, high‑capacity protection for essential systems. It excels at safeguarding large battery banks and multiple accessories from overcurrent events, while remaining compact enough to fit in tight engine rooms or open cockpit panels.

• DC main distribution and inverter protection in marine or RV setups
• Windlass and bow thruster circuit safeguarding
• Multiple circuit organization within a single compact unit

Durability and maintenance

Designed for longevity, the fuse block uses corrosion‑resistant materials and a weatherproof design suitable for exposed locations. An insulating cap helps reduce the risk of shorts during maintenance, and the clear labeling speeds wiring checks and inspections.

• Corrosion‑resistant construction for saltwater environments
• Clear amperage labeling aids quick identification
• Compact form factor supports clean, efficient installations
• Flexibility to pair with your preferred MRBF fuse ratings

Note: Fuses are sold separately. The design supports universal fit across a range of boats and vehicles, making it a versatile option for organized, robust power protection.