Blue Sea Systems Class T Fuse Holder 225–400A with Insulating Cover
Product info
Product info
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The Blue Sea Systems 5502100 Class T Fuse Holder is a robust, high-quality fuse block designed for demanding DC electrical systems in boats, campervans, motorhomes and off-grid power setups. Suitable for Class T fuses from 225A to 400A, it provides fast-acting circuit protection for high-load equipment such as inverters, lithium battery banks, bow thrusters and other powerful onboard electronics.
Built with durability and safety in mind, this fuse holder features a strong heat-resistant base, tin-plated copper fuse mounting blocks and stainless steel studs for secure, corrosion-resistant connections. The included insulating cover helps protect live terminals and includes cable access points, allowing wiring to be routed neatly from different directions.
Its four-stud design gives plenty of working space around the terminals, making it easier to fit large cable lugs without obstruction. The holder is also ignition protected, making it suitable for marine and engine-space applications when installed correctly.
Key Features
- Suitable for Class T fuses from 225A to 400A
- Ideal for high-current DC systems, inverters and battery protection
- Supplied with protective insulating cover
- Four-stud layout for easier installation of large cable lugs
- Stainless steel studs and flange nuts for secure, corrosion-resistant connections
- Tin-plated copper mounting blocks for excellent conductivity
- Heat-resistant base material
- Cover breakouts allow cable entry from multiple directions
- Ignition protected for suitable marine installations
- Suitable for 12V, 24V and 48V systems
Technical Specifications
- Manufacturer: Blue Sea Systems
- Part number: 5502100
- Fuse type: Class T
- Fuse range: 225A–400A
- Maximum amperage: 320A, or 300A continuous inside engine spaces
- Maximum voltage: 160V DC
- Cable size: Up to 4/0 AWG
- Terminal stud size: 5/16"-18 / M8
- Mounting fastener size: 1/4" or M6
- Fuse mounting blocks: Tin-plated copper
- Weight: Approx. 0.5kg
- Approvals: ISO 8846 Marine and SAE J1171 Marine ignition protection
A professional-grade fuse holder for safely protecting high-current electrical circuits in marine, leisure vehicle and off-grid installations. Specs checked against Blue Sea Systems and retailer technical listings
Delivery & Returns
Delivery & Returns
🚚 Fast Dispatch: Order by 2pm and we’ll aim to ship your order the same day, Monday to Friday.
🇬🇧 UK Delivery: DPD, Parcelforce, or Royal Mail
📦 30-Day Returns: Unused items in original packaging
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About Nomadic Leisure
At Nomadic Leisure, we’re more than a retailer — we’re a family-run UK business built on a shared love of travel and adventure. Whether you’re converting a campervan, exploring off-grid living, or setting sail, we provide the gear and expertise to make every journey better.
Our products are tested, trusted, and chosen for quality, reliability, and value — helping you travel with confidence wherever the road (or water) takes you.
- Family-run UK business with real-world experience
- Handpicked products from trusted leisure brands
- Knowledgeable, UK-based customer support