Don't confuse these two important concepts when choosing a fuse.automotive fuse box

　　Is the melting value of a fuse important? In short, this is important.

　　This melting value is to ensure that the heat generated through the fuse during a surge does not have enough time to transfer heat from the fuse to the external circuit. Once the current I and time t are measured, the hot melt value I2t can be easily calculated. After the fuse is blown, it will generate an arc before opening.

　　For fuses, they can have the same rated voltage and current, as well as the same rated breaking capacity, in the same response time category (slow, medium, and fast). However, there are many options for hot melt values.

　　Basically, the higher the hot melt value, the longer the fuse will blow, or the greater the surge that the fuse will withstand before it blows. This is different from the breaking capacity of a fuse, which refers to the greater current that the fuse can withstand at a specified voltage before breaking the circuit or generating an arc. If the glass tube of the fuse breaks, the current has exceeded the breaking capacity of the fuse. Sometimes the situation can get worse. If the breaking capacity of a fuse is not correctly selected, the fuse may break or explode. This may cause harm to the surrounding environment, especially in the presence of combustible gases. Like most electronic components, temperature and other derating factors should also be considered.

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2023.06.27 Attend 2023 Guangzhou International Innovation Exhibition and New Energy Vehicle Innovation Exhibition