Blue Sea Systems 5025 ST Blade Fuse Block 6 Circuit - Clean, Safe

Our review of the Blue Sea Systems 5025 ST Blade Fuse Block finds it a practical choice for boaters and vehicle owners who need a tidy, reliable way to add multiple fused circuits at a battery or distribution point. The biggest reason to buy is its combination of a covered, ABYC/USCG-compliant insulating design and a clearly organized positive and negative bus that accepts ATO/ATC fuses and ring or spade terminals, making installations quicker and safer on 12V and 24V systems.

Key Features

• Six fused circuits: Provides up to six ATO/ATC fast-acting blade circuits so you can add multiple accessories without separate fuse holders.
• High block capacity: The block handles up to 100A total and 30A per circuit, accommodating substantial accessory loads on 12V and 24V installations.
• Covered insulation: The clear insulating cover meets ABYC and USCG requirements and includes label recesses and storage for two spare fuses for safer, neater installations.
• Positive and negative bus studs: #10-32 studs for both positive and negative distribution simplify wiring and centralize connections for a cleaner setup.
• Durable terminals: #8-32 screw terminals with captive star lock washers accept ring or spade terminals and are specified with a torque value for consistent, vibration-resistant connections.

Who It's For

This fuse block is ideal for recreational boat owners, small commercial craft, and automotive or RV users who need to add up to six protected circuits and prefer a compact, covered solution that meets marine insulation standards. Installers who value clearly labeled circuits and a cover with spare fuse storage will appreciate the practical layout.

It is less suited to systems that require circuits above 30A each or where a different fuse type is preferred; users needing larger bus studs or higher per-circuit ratings should consider a heavier-duty distribution option.

Pros & Cons

Pros

• Clear insulating cover with label recesses and spare fuse storage keeps fuses accessible and protected.
• Accepts standard ATO/ATC blade fuses and common ring or spade terminals for easy wiring integration.
• Positive and negative distribution with #10-32 studs centralizes connections for a neater installation.
• Meets ABYC/USCG insulation requirements and includes captive screws and recommended torque specs for reliable connections.

Cons

• Maximum 30A per circuit limits use for heavier individual loads where higher-amp circuits are needed.

Specifications

Part number	5025
Circuits	6 ST blade (ATO/ATC)
Max amps per block	100A
Max amps per circuit	30A
Max volts	32V DC
Mounting	#8 (M4) screw
Terminal types	#8-32 screws with captive star lock washer; #10-32 studs for buses

Our Verdict

The Blue Sea Systems 5025 ST Blade Fuse Block is a sensible, well-built option for anyone adding multiple protected circuits to a boat, RV, or vehicle battery area; its covered, ABYC/USCG-compliant design and organized bus studs deliver secure, tidy installations and good value for typical accessory loads up to 30A per circuit.

Frequently Asked Questions

Does it accept spare fuses?
Yes. The clear insulating cover includes recesses and storage for two spare blade fuses.

What fuse type fits this block?
It accepts ATO/ATC fast-acting blade fuses; fuses are sold separately.

Is it suitable for marine use?
Yes. The insulating cover satisfies ABYC and USCG insulation requirements and the unit is designed for battery-mounted distribution on boats.