Fuse Holders - In Line
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
What Are Inline Fuse Holders?
Inline fuse holders are compact housings designed to place a fuse directly within a single wire run, providing targeted overcurrent protection exactly where it's needed. They install along wiring harnesses to put overcurrent protection in places where fuse blocks will not fit, or where routing cables to a junction box would prove impractical. Whether you're wiring a boat, vehicle, RV, or trailer, inline fuse holders are one of the most flexible and essential components in any electrical installation.
Why Inline Fuse Protection Matters
Marine fuse blocks and holders protect onboard electrical systems from short circuits and overloads. When a fault occurs, the fuse is designed to fail first, interrupting power before wiring or connected equipment is damaged — a sacrificial function that helps reduce the risk of costly repairs and lowers the chance of electrical fires, especially in confined engine rooms and distribution panels.
Inline fuse holders provide a way to install fused protection along the positive conductor of a circuit, and unlike breakers on a boat's DC panel, inline fuses can be rated below 2.5A to protect sensitive electronic equipment that may only require one amp of protection. This makes them indispensable for modern electronics-heavy installations.
What to Look for When Shopping Inline Fuse Holders
Choosing the right inline fuse holder involves matching several key specs to your application:
- Fuse Type: Common formats include AGC (glass tube), ATO/ATC (blade), MDL, and MAXI fuses. Make sure your holder accepts the fuse style already used in your system.
- Wire Gauge: Match the holder's AWG rating to your wiring. Wire gauge compatibility typically ranges from 8 to 16 AWG, depending on the product.
- Waterproofing: For marine, outdoor, or under-hood use, look for watertight or weatherproof housings. Watertight construction limits moisture intrusion in exposed or damp locations, and many holders are made from materials like Polybutylene Terephthalate (PBT) that resist heat, corrosion, and mechanical stress.
- Amperage Rating: Confirm the holder's maximum amp rating meets or exceeds your circuit's load. Options range from low-amp holders for sensitive electronics to heavy-duty MAXI holders for high-current applications.
- Ease of Access: Fuses can be replaced quickly without disconnecting circuits on well-designed holders — a valuable feature when troubleshooting in the field.
Top Brands in Inline Fuse Holders
Sea-Dog Line is a trusted name in marine hardware with a broad lineup of inline fuse holders built for harsh marine environments. Their watertight AGC holders feature injection molded nylon construction and tin-plated copper contacts to resist corrosion, making them a go-to choice for boaters who demand reliability in wet conditions.
Blue Sea Systems is known for engineering high quality marine electrical components for safety, reliability and performance. Their inline fuse holder range spans crimpable, heavy-duty, waterproof, and MAXI-style options, giving boaters a range of choices for main and branch circuit protection.
Seachoice offers a wide assortment of inline fuse holders at accessible price points, making them a popular choice for budget-conscious boaters and DIY installers who need reliable circuit protection across multiple runs.
WirthCo brings automotive-focused inline fuse holder solutions to the lineup, catering to car and truck enthusiasts who need straightforward, dependable protection for added accessories and custom wiring projects.