What is an In-Line Fuse?


Fuses are protective devices used for electrical and electronic components. What differentiates an in-line fuse from other types of fuses is an in-line fuse is secured inside a cable as opposed to a ceramic or glass cartridge. If you’re shopping for an in-line fuse, learn more about their functions and how they work, then contact us at Gateway Cable Company for more information on our in-line fuse assemblies.

What Does an In-Line Fuse Look Like?

Generally, in-line fuses are comprised of two cables that are connected by a fuse and fuseholder or fuse box. One cable connects to the positive power supply and the other connects to the device or equipment to which you’re supplying power. Separating the two cables with the fuse helps protect the circuit of whatever is being supplied. The fuseholder or fuse box protects the fuse and is often watertight.

What Does an In-Line Fuse Do?

Like other types of fuses, the main purpose of an in-line fuse to protect the circuit of a piece of electrical or electronic equipment. If an electrical device is suddenly overcharged with current, the filament inside the fuse will melt and break the circuit. In-line fuses look a bit different from other types of fuses but work in the same way. One of the most common uses for in-line fuses is automotive. Starter motors usually draw the highest current of any component inside a vehicle. In-line fuses are often used to protect the alternator and are designed to break the circuit if it becomes overloaded.

Replacing an In-Line Fuse

When you need to replace an in-line fuse, you’ll need to unscrew the two connecting halves and break the fuseholder or fuse box into two sections. Once you’ve separated the two halves, you can replace the old fuse with a new one.

Fuses vs. Circuit Breakers

Fuses and circuit breakers serve the same purpose: to prevent over-current situations that could pose a safety hazard. Although they’re often confused, they’re not the same. As stated above, fuses are replaceable; the filament inside a fuse’s cartridge will melt in over-current situations and stop the circuit. Circuit breakers are, in a sense, a type of resettable fuse. When the load of a circuit surpasses the load of a breaker, the breaker uses a bimetal strip or solenoid to trip the switch and prevent damage. After they’ve been tripped, breakers are easily reset and don’t need to be replaced.

Find In-Line Fuse Assemblies at Gateway Cable Company

Gateway Cable Company is your source for in-line fuse assemblies, starter cables, and more. Our knowledgeable team can help you find the appropriate component for your application. If you have a specific product in mind, request a quote online and we’ll get in contact with you via phone, email, or fax.