Fuses are an excellent solution for guarding electric devices against overcurrent—they are used as safety devices to prevent excessive flow-causing faults. When a fuse breaks, a user’s attention is drawn to where the fault is in the circuit. However, sometimes it can be useful to have fuses where user intervention is not needed, and this is where PTC fuses come in. PTC, known as positive circuit coefficient fuses, are resettable fuses that do not require user intervention and can be very beneficial in several circumstances. This article will cover how PTC fuses work and their top benefits.
How They Work
A PTC fuse is made from a piece of polymer material loaded with conductive particles. When a current passes through a PTC, it dissipates power, and its temperature increases if it heats suddenly; the polymer changes to an amorphous state and expands, breaking the connection to the particles, allowing for a slowing of the current, thus avoiding fault to the electrical device.
Unlike traditional fuses that do not recover after the fault is corrected, a pct resettable fuse will reset after power is removed from the circuit. These fuses can reset due to a temperature-dependent resistor whose resistance increases with a temperature rise—a PTC fuse increases its resistance to an overcurrent, short circuit, or circuit fault to restrict the current flow and help avoid damage to your electrical devices.
Common Uses of PTC Fuses and Their Benefits
PTC fuses are commonly used to protect overcurrent faults for telephone central office equipment, set-top boxes, voice-over IP, alarm systems, battery packs, automatic door locks, and loudspeakers.
Making the switch to PTC fuses is very beneficial for most electrical devices since they offer numerous benefits, for example, long-lasting, increased safety, low costs, and a good track record. In addition, PTC fuses ensure the increased safety of your device since they can cool down quickly and temperature levels are much lower than traditional fuses; thus, they are quicker to trip. Once your device has cooled down, the PTC is also immediately ready to protect you from further overloads. Furthermore, the smaller size of PTC fuses means that they are much easier to fit into the package design. Plus, the lower initial resistance of PTC fuses implies that they are a lot more efficient than traditional fuses.
The fact that PTC fuses are resettable means that they may be used repeatedly in a circuit and usually do not need to be changed for the product’s life—making them very cost-efficient and better for the environment.
Suppose you are wondering what fuse to use in your electrical devices, especially if you work in an office environment when slick efficiency is needed. In addition, you want to avoid circuit breakages on integral devices. In that case, it is worth exploring the options of PTC resettable fuses.
The technology behind fuses and electrical systems is advancing day by day, and there are innumerous choices for you. So, explore the options, do your research, and hopefully, you will reap the benefits.