Compact, Reliable DC Power Distribution for Marine, RV & 4WD Systems
Consolidate auxiliary electrical circuits and eliminate messy wiring with the Blue Sea Systems ST Blade Fuse Block (4 Circuits with Ground Bus). Designed for harsh marine and off-grid environments, this high-performance distribution block provides central protection for up to 4 ATO/ATC blade fuses, along with an integrated negative ground bus bar to streamline your installation.
Featuring tin-plated copper buses and screw terminals, it delivers maximum conductivity and corrosion resistance. The clear insulating cover features a clip-latch system with storage for spare fuses, while satisfaction-rated flame-retardant materials ensure maximum safety in engine bays, caravan setups, and dual-battery systems.
Key Features
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Integrated Ground Bus: Includes a common negative ground bus bar to consolidate returns and eliminate extra terminal blocks.
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4-Fuse Circuit Protection: Accepts standard ATO and ATC fast-acting blade fuses from 1A to 30A per circuit.
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Corrosion-Resistant Components: Tin-plated copper buses and screw terminals provide superior electrical conductivity and marine-grade corrosion defense.
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Insulating Protective Cover: Clear cover satisfies ABYC/USCG safety requirements, incorporates easy-to-use write-on label recesses, and holds 2 spare fuses.
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High Amp Rating: Built to handle up to 30A maximum per circuit and 100A total continuous rating across the entire block.
Technical Specifications
| Specification |
Details |
| Brand |
Blue Sea Systems |
| Circuits |
4 Fuse Positions |
| Ground Bus |
Integrated Negative Bus Bar |
| Max Voltage |
32V DC |
| Max Amperage (Per Circuit) |
30A |
| Max Amperage (Total Block) |
100A |
| Fuse Type |
Standard ATO / ATC Blade Fuses |
| Terminal Type |
#8-32 Screws with Captive Star Washers |
| Main Stud Size |
#10-32 Stud with Ring Terminal Connection |
| Base Material |
Reinforced Polycarbonate |
We appreciate your business and are committed to providing exceptional service and timely delivery. Please review the shipping information below before placing your order.
Is It In Stock?
Over 98% of the products listed on our website are in stock.
If a part is not currently in stock, we will notify you as soon as we process your order. We process all orders on the same business day they are received.
If you would like to confirm availability before placing your order, please contact us.
Packaging
Rest assured that all items will be securely packaged to minimise the risk of damage during transit. Fragile or high-value parts may be packaged with additional protective materials such as bubble wrap, foam padding, or reinforced cartons.
Where Do You Ship From?
All parts are stocked and shipped from our location at The Boat Works Marina on the Gold Coast, Australia.
Shipping Rates
Shipping rates vary based on the size, weight, and destination of the package. Estimated shipping costs are displayed during checkout before your order is placed.
Free Shipping – Australia
We offer Free Shipping on parts orders over $55 within Australia.
If you select Free Freight, your order will generally be sent using Australia Post Standard or another standard delivery service.
Australia Post standard delivery is typically 4–10 business days within Australia.
If delivery time is important, we recommend selecting one of our paid express freight services.
Please note:
- Certain items do not qualify for Free Freight. Please refer to the product description for details.
- Dangerous goods, oils, lubricants, DeFOUL, Propspeed products, batteries, and certain oversized items may be excluded from Free Freight and may require road freight services.
Order Tracking
Once your order has been dispatched, you will receive an email containing your tracking number and carrier information.
Who Do You Ship With?
We ship using:
- Australia Post
- StarTrack
- Team Global Express
- UPS
- DHL Express
- FedEx
- TNT
- Couriers Please
- Freight forwarding and brokerage services such as Transdirect
We have extensive experience shipping throughout Australia and worldwide. We will select the carrier we believe is most suitable for your location and the type of goods being shipped.
If you would prefer to use your own carrier account or would like to discuss shipping options, please contact us.
International Orders
We ship worldwide.
International orders may be subject to import duties, taxes, VAT/GST, customs clearance fees, brokerage charges, and other fees imposed by the destination country.
These charges are not included in the product price or shipping cost displayed at checkout and are the responsibility of the recipient.
Customs regulations vary by country. In some cases, customs authorities may require additional information such as a passport number, national identification number, tax identification number, or business registration number before a shipment can be cleared for delivery.
If you are unsure what charges may apply in your country, we recommend contacting your local customs office before placing an order.
