Blue Sea Systems 5024 ST-Blade Battery Terminal Mount Fuse Block, 4-Circuit, 100 Amp

The Blue Sea Systems 5024 is an ST-Blade fuse block that mounts directly on a battery terminal stud, giving you an independent power source that consolidates branch circuits and eliminates the need for in-line fuses. The kit includes both a positive fuse block and a matching 4-circuit negative busbar, so positive and negative connections are handled from a single compact mounting point on the battery. Each of the four circuits accepts standard ATO or ATC blade fuses rated up to 30 Amps, while the block itself carries a 100 Amp total rating, making it suitable for consolidating multiple accessory circuits at the power source.

Wire connections are made through screw terminals that accept ring terminals, and the kit ships with 8 nylon-insulated ring terminals so both the positive and negative sides are ready to wire. An insulating cover is included and meets ABYC/USCG insulation requirements, protecting the live terminals from accidental contact. The block is ignition protected, meeting ISO 8846 and SAE J1171, which makes it suitable for installation in gasoline engine compartments. Because the block mounts on the battery terminal itself, it can be used to power both always-on (24-hour) circuits and switched circuits from the same block, simplifying wiring at the battery.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 5024
• Current Rating: 100 Amps
• Number of Circuits: 4
• Per-Circuit Fuse Rating: Up to 30 Amps
• Fuse Type: ATO or ATC blade fuse
• Connector Type: Screw terminals (accept ring terminals)
• Number of Contacts: 16
• Mounting Type: Battery terminal mount
• Material: Nylon
• Voltage: 32 Volts (DC)
• Upper Temperature Rating: 260 Degrees Celsius
• Product Dimensions: 8 inches W x 2 inches H
• Weight: 0.5 pounds
• Ignition Protection: Meets ISO 8846 and SAE J1171
• Insulating Cover: Included, meets ABYC/USCG insulation requirements
• Warranty: Lifetime
• Included Components: Fuse block, 4-circuit negative busbar, write-on labels, 8 ring terminals

Frequently Asked Questions

How does the Blue Sea Systems 5024 mount? The 5024 mounts directly on the battery terminal stud rather than on a bulkhead or panel, giving you a compact, independent fused source right at the battery.

How many circuits does the 5024 fuse block provide? It provides four fused circuits, each accepting a standard ATO or ATC blade fuse rated up to 30 Amps.

What is the total current rating of the 5024? The block carries a 100 Amp total rating across its four circuits.

Is the negative side included in the kit? Yes, the Blue Sea Systems 5024 kit includes a matching 4-circuit negative busbar along with the positive fuse block, so both sides mount at the battery terminal.

What type of fuses does the 5024 use? It uses ST-Blade style fuses, accepting common ATO or ATC blade fuses up to 30 Amps per circuit.

Can the 5024 be used for both always-on and switched circuits? Yes, the fuse block can be used for 24-hour circuits and switched circuits within the same block.

Is the 5024 safe for a gasoline engine compartment? Yes, the 5024 is ignition protected, meeting ISO 8846 and SAE J1171, which qualifies it for installation in gasoline engine compartments.

What wire connections does the 5024 use? Wires connect via screw terminals that accept ring terminals; 8 nylon-insulated ring terminals are included in the kit for both the positive block and negative busbar.

Does the 5024 come with a protective cover? Yes, an insulating cover is included and meets ABYC/USCG insulation requirements to protect the live terminals.

What is included in the box with the Blue Sea Systems 5024? The kit includes the fuse block, a 4-circuit negative busbar, write-on labels, and 8 ring terminals.

How much does the 5024 weigh? The Blue Sea Systems 5024 weighs 0.5 pounds.

What voltage is the 5024 rated for? It is rated for 32 Volts DC.