Automotive fuse
Fuses are commonly used in automotive electrical systems to protect circuits against damage caused by overload conditions. In automotive vehicles, there are two main types of low voltage (i.e., 6 to 24 volt) fuses in use. The first and older type of low voltage automotive fuse is the glass ferrule fuse, which is also called a cartridge-type fuse, and has a hollow glass body. A cartridge type fuse contains a small filament or fuse link that is designed to melt and interrupt the circuit if too much current passes through the fuse. The second and newer type of low voltage automotive fuse called an automotive blade-type fuse which is a two-piece assembly having a thin, box-like housing and a plate-like, all metal plug-in fuse element secured therein. The metal plug-in fuse element has a pair of spaced, confronting, exposed terminal blades extending from one side of the housing. These terminal blades plug into pressure clip socket terminals. Current-carrying extensions of the terminal blades extend into the housing where they are closely encompassed by the housing walls. A fuse link unsupported between the ends thereof extends suspended between the current-carrying extensions and is spaced from the housing side walls. Automobiles typically have a fuse terminal block which is mounted adjacent the instrument panel or forward fire wall to provide a means for securing fuses and for providing connections to various electrical components of an automobile such as headlights, horns, power seats, power windows and numerous electrical options which can be customer selected. Many fuses are accommodated in an electrical junction box to be mounted on a motor vehicle. Each fuse typically comprises a fuse element including an input terminal, an output terminal spaced from the input terminal in the longitudinal direction of the fuse, a fusible portion disposed between the input and output terminals, and an insulation resin fuse body embedding the fuse element therein.
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