Blue Sea Systems 5025 ST Blade 6-Circuit Fuse Block with Negative Bus and Cover, 100 Amp

The Blue Sea Systems 5025 is a 6-circuit ST Blade fuse block built for organizing and protecting DC electrical circuits on boats and other 12/24-volt DC systems. It consolidates six individually fused positive circuits alongside an integrated negative bus bar, so every ground connection on that circuit group terminates at one central point instead of a tangle of ring terminals. The block accepts standard ATO or ATC blade-style fuses, which are widely available and easy to swap during troubleshooting or maintenance.

Current-carrying buses and fuse clips are tin-plated copper for strong conductivity and resistance to corrosion in the humid, salt-air conditions typical of marine and mobile installations. The block is rated 32 volts DC and can carry up to 100 amps total across the group, with up to 30 amps supported per individual circuit. A clear insulating cover snaps on with a push-button latch to guard live terminals from accidental shorts and debris, and it doubles as spare-fuse storage with recessed areas for writing on circuit labels. Terminals use #8 (M4) screw connections for mounting and wiring.

This fuse block suits DC panel builds, accessory circuit distribution, and any 12V or 24V system where a compact, serviceable, corrosion-resistant fuse and ground termination point is needed.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 5025
• Number of Circuits: 6
• Current Rating: 100 Amps total (up to 30 Amps per circuit)
• Voltage Rating: 32 Volts DC
• Fuse Type: ATO or ATC blade fuses (ST Blade)
• Connector Type: Screw
• Mounting Type: #8 Screw (M4)
• Material: Plastic housing with tin-plated copper buses and fuse clips
• Product Dimensions: 3.32 inches W x 1.52 inches H
• Weight: 0.55 pounds
• Upper Temperature Rating: 130 degrees Celsius
• Included Components: Fuse block, cover, 20 write-on circuit labels
• Warranty: Lifetime
• UPC: 632085050252

Frequently Asked Questions

How many circuits does the Blue Sea Systems 5025 fuse block have? The 5025 has 6 individually fused circuits plus an integrated negative bus bar for grounding all 6 circuits at one point.

What type of fuse does the 5025 use? It uses standard ATO or ATC blade-style fuses, sold separately and widely available at auto parts and marine stores.

What is the amp rating of this fuse block? The Blue Sea 5025 is rated for 100 amps total across the block, with up to 30 amps supported per individual circuit.

What voltage systems is the 5025 rated for? It is rated for 32 volts DC, making it suitable for both 12-volt and 24-volt DC marine and mobile electrical systems.

Does the 5025 come with a cover? Yes, the Blue Sea 5025 includes a clear insulating cover with a push-button latch that protects terminals and stores spare fuses.

How much does the Blue Sea 5025 fuse block weigh? It weighs 0.55 pounds.

What are the dimensions of the 5025 fuse block? The block measures 3.32 inches wide by 1.52 inches high.

What materials are the buses and fuse clips made of? Tin-plated copper is used for the buses and fuse clips on the 5025, which resists corrosion in marine and mobile environments.

How is the 5025 fuse block mounted and wired? It uses #8 (M4) screw connections for both mounting and circuit wiring.

What is included in the box with the 5025? The Blue Sea 5025 ships with the fuse block, the insulating cover, and 20 write-on circuit labels for identifying each circuit.

What is the negative bus bar used for on the 5025? The integrated negative bus bar lets all 6 circuits' ground wires terminate at a single point on the 5025 block instead of requiring separate grounding hardware.

What is the maximum operating temperature for the 5025? The Blue Sea Systems 5025 carries an upper temperature rating of 130 degrees Celsius.