Not sure what an electrical fuse is and what it's used for? An electrical fuse is an essential component in an electrical installation. It is used to protect the electrical and electronic circuit of any device. The electrical fuse is placed before the current enters the circuit and is designed so that if the current is too high, the fuse filament burns out and prevents the current that would damage the system from passing through. This way, damage to the circuit is avoided. There are different types of electrical fuses, but the most common is the glass-encapsulated fuse, also known as a glass fuse. In our extensive range, you will find DF brand glass fuses of various intensities.