Fuses are important electrical safety components used to protect loads against high current and for short circuit protection. They are thin strips of electrical conductors that heat up and melt when a current that is above the current designed for it to withstand passes through it, thereby protection the load that it is connected to. Fuses are relatively cheap components making replacement easy to do and making having several spares easy.
How many terminals does a fuse have?
A fuse has two terminals. It is not a component that has polarity but rather a conductor that easily melts/breaks when high current passes through it.
What is a car battery fuse?
A fuse that is connected to the battery protects the main supply circuit to loads. Aside the battery fuse, there are other smaller rated fuses that are directly protecting individual loads. The battery fuse is the first line of defense to the electronics in the vehicle.
Symptoms of a bad battery fuse
Below are the symptoms of a bad battery fuse: