AS9120B, ISO 9001:2015, AND FAA AC 0056B ACCREDITED

A Guide to In-Line Fuses

Fuses are a staple of countless electrical systems and assemblies, ensuring that electrical devices are protected from the harmful effects of overcurrent conditions. Fuses can come in many forms, their general design consisting of tubes that feature a metal coil or internal component that breaks or melts under excess current. When this occurs, electricity will no longer be able to flow through the rest of the circuit to avoid damage or harm. While most fuses are installed within designated boxes, specialized forms known as in-line fuses are able to be directly implemented within circuitry.

In general, in-line fuses can be described as a fuse-enclosed connector that is placed within a circuit line, a fuse holder being situated on the component. Like most other fuse options, in-line fuses are rated for a specific value of volts or amps where the fuse element will blow when unsafe voltage or amperage levels are surpassed. These fuses break down just like other options, preventing any electrical current from flowing through the device.

Overcurrent conditions can be very unsafe, leading to damage that will require the replacement or repair of various parts. As heat is a byproduct of electricity, excess voltage or amperage levels may lead to fire hazards where flammable materials ignite. Because of this additional risk, fuses are essential to deter part damage and to uphold the safety of those near circuit elements.

Oftentimes, fuses are placed between two components like a battery and a device connected by an electrical wire, allowing the device to be protected from any overcurrent sourcing from the battery. While fuses placed within fuse boxes can be set up to perform the same function, there are certain advantages to in-line fuses that may make them the best choice for a specific need. For example, in-line fuses only affect the circuit or electrical wire they are connected to, meaning that any other devices or components will be unaffected when the fuse blows. With fuse boxes, any circuit elements that are connected will lose power, potentially causing multiple circuits to cease electrical flow.

Alongside more specific protection, in-line fuses are also fairly easy to replace. As stated before, all in-line fuses feature a fuse holder where the fuse element itself is enclosed. With this placement, switching out an old fuse simply requires one to remove the blown element from the enclosure with a new fuse of the same type. This can potentially lower certain repair and replacement costs, a clear advantage for those with tighter budgets.

When installing an in-line fuse, it is important that one ensure that the process is carried out properly. For example, circuits that feature cables will need to have the cable cut so that each piece of the fuse’s holder can be installed at an open end. Additionally, a majority of in-line fuses utilize a snap or screw design where the fuse is placed down before attaching the two pieces of the holder together to secure everything.

If you are interested in procuring in-line fuses for your circuitry, we at Automatize Aviation can help you source top-quality options that trace back to leading global manufacturers. With our purchasing power and market expertise, we can help you get everything you need for your operations, all while saving you time and money. If you find any items listed on our website that you are interested in, be sure to use our online RFQ service to rapidly request quotes for your comparisons. Once we receive and review your completed form, a member of our staff will reach out to you in 15 minutes or less to present a customized solution for your comparisons. If you have any further questions or concerns, be sure to give us a call or email so that we may discuss your needs and how we may meet them with ease.


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