Description
Product Overview
The Blue Sea 5502 Fuse Block Class T is engineered for high‑current applications where reliability and safety are paramount. With a 400 A current rating and 400 copper contacts, this fuse block provides a solid foundation for demanding marine and automotive electrical systems. The use of copper ensures excellent conductivity and low resistance, reducing heat buildup and extending the lifespan of both the fuse block and the circuits it protects.
Designed for DIN‑rail mounting, the block fits seamlessly into standard panels, saving valuable space while maintaining a clean, organized layout. The screw‑type connector offers a secure, vibration‑resistant connection that is easy to install and service. Each contact is individually insulated, meeting ignition‑protected specifications to prevent accidental sparks in hazardous environments.
Measuring 8.86 × 7.36 × 2.87 inches and weighing just under one pound, the unit balances compactness with robust construction. The enclosure is fabricated from high‑grade materials that resist corrosion, making it suitable for marine installations where exposure to saltwater and humidity is common. The product carries the reputable Blue Sea Systems brand, known for marine‑grade electrical components that meet stringent industry standards.
Beyond its technical specifications, the 5502 Fuse Block offers practical benefits such as easy visual inspection of fuse status, straightforward replacement procedures, and compatibility with a wide range of fuse types. Whether you are upgrading an existing system or building a new installation, this fuse block provides the flexibility and confidence required for mission‑critical power distribution.
![[Product front view showing all components]](https://www.workspacelife.store/wp-content/uploads/2026/07/155a80b42307448c948f0ff6b0f0ec42.jpg)
Usage
This fuse block excels in environments where high current loads and reliable protection are essential. In marine applications, it safeguards engine control units, navigation equipment, and lighting circuits from overloads and short circuits, ensuring safe operation even in rough seas. The DIN‑rail design allows installers to mount the block alongside other control devices, creating a tidy and serviceable panel layout.
Automotive enthusiasts and professional mechanics also benefit from the 5502 Fuse Block when retrofitting performance vehicles or building custom electric systems. Its 400 A capacity accommodates powerful alternators, high‑output audio amplifiers, and advanced lighting setups without compromising safety. The screw connectors simplify wiring, reducing installation time and minimizing the risk of loose connections that could lead to intermittent faults.
Its compact footprint makes it ideal for confined spaces such as engine compartments, instrument panels, and offshore equipment enclosures. The block’s robust construction tolerates temperature extremes and vibration, making it suitable for both on‑shore and offshore installations where durability is a non‑negotiable requirement.
Why Choose Us
Choosing the Blue Sea 5502 Fuse Block means selecting a product backed by decades of marine‑grade engineering expertise. Blue Sea Systems has a reputation for delivering components that exceed industry standards for safety, performance, and longevity. Each fuse block undergoes rigorous testing to verify compliance with ignition‑protected specifications, giving you confidence that the device will perform reliably under fault conditions.
Our commitment to quality extends beyond the manufacturing process. We provide comprehensive technical documentation, detailed installation guides, and responsive customer support to assist you throughout the product lifecycle. Should you encounter any challenges, our knowledgeable support team is ready to offer troubleshooting assistance, ensuring minimal downtime for your projects.
In addition to the product itself, we offer a range of complementary accessories such as DIN‑rail brackets, spare fuses, and wiring kits that are engineered to work seamlessly with the 5502 Fuse Block. This ecosystem approach simplifies procurement and guarantees compatibility, allowing you to focus on the core aspects of your electrical design.
Key Features
- High 400 A current rating delivers robust protection for heavy‑duty marine and automotive circuits.
- Copper contacts provide superior conductivity and reduced heat buildup for longer service life.
- DIN‑rail mounting enables compact, organized panel installations and easy future upgrades.
- Screw‑type connectors ensure secure, vibration‑resistant connections that are simple to install.
- Comprehensive after‑sales support includes technical documentation, installation assistance, and responsive customer service.
FAQ
What size fuses can I use with the 5502 Fuse Block?
The block is compatible with standard blade‑type fuses that match the 400 A rating and the physical dimensions of the contacts. It is recommended to use fuses supplied by Blue Sea Systems or other reputable manufacturers that meet the same ignition‑protected specifications.
Can this fuse block be used in a marine environment with exposure to saltwater?
Yes. The enclosure is fabricated from corrosion‑resistant materials and the internal contacts are sealed to protect against moisture and salt ingress. This makes the 5502 Fuse Block suitable for both interior and exterior marine installations.
How does the ignition‑protected rating benefit my installation?
Ignition‑protected rating means the fuse block is designed to prevent the ignition of flammable gases or vapors in the event of a fault. This safety feature is critical for marine vessels, offshore platforms, and any environment where explosive atmospheres may be present.
Is the DIN‑rail mounting compatible with standard panels?
Absolutely. The block conforms to the IEC 60715 standard for DIN‑rail dimensions, allowing it to be mounted on any panel that supports a standard DIN rail. This ensures broad compatibility across a wide range of control cabinets and enclosures.
What warranty does Blue Sea Systems provide for this fuse block?
Blue Sea Systems offers a limited warranty that covers manufacturing defects for a period of one year from the date of purchase. The warranty does not cover damage caused by improper installation, misuse, or external factors such as corrosion from non‑marine environments.




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