Classification of fuses

　　Fuse is a key component used for circuit protection, mainly to cut off the current when the circuit is overloaded or short circuited, in order to protect the safety of electrical equipment. According to different applications and characteristics, fuses can be divided into the following three categories:

　　1. Plug in fuse: This type of fuse is usually used in cars and some household appliances. Its characteristics are easy installation and easy replacement. The plug-in fuse has a rated current value, and the selection needs to be matched according to the operating current of the circuit.

　　2. Spiral fuse: This type of fuse is commonly found in old-fashioned electrical equipment, characterized by the fuse being wrapped around a ceramic core and then wrapped in a layer of glass or plastic shell. The replacement of spiral fuses is relatively complex, but they have strong resistance to high voltage and high current.

　　3. Surface mount fuses: With the development of electronic technology, surface mount fuses are widely used in various electronic products due to their advantages such as small size and easy installation. Surface mount fuses usually use SMT technology, which can be directly soldered onto circuit boards, saving space and improving production efficiency.

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Brief analysis of the protective components and their corresponding functions required for circuits