2 pin 8W0972575 Automotive Wire Harness Connector Socket Rubber Shell Outer Sleeve 0.6 Series

If: heat generation speed < heat dissipation speed, the fuse will not blow;

If: heat generation speed = heat dissipation speed, it will not fuse for a long time;

If: heat generation speed > heat dissipation speed, heat will accumulate, and when the temperature rise reaches above the melting point of the fuse, the fuse will blow.

This is how a fuse works.

In the circuit design, the fuse is connected in series on the power supply side of the circuit. When the load is overcurrent or the device or wire is short-circuited, the heat generated by the current will reach the melting point in the smaller cross-sectional area of the fuse and melt, thus protecting the wires of the circuit. The following figure is Schematic diagram of the fusing process of a fuse.

2 Types and selection of fuses/fuses

After understanding the working mechanism of the fuse, it is necessary to understand and be familiar with the types of fuses before the matching design of the fuses. The types of fuses used in different scenarios are different.

Introduction to the categories of fuses

Automobile fuses have the highest degree of standardization and are used by automobile manufacturers all over the world. Taking Littelfuse's fuses as an example, the specific classification of automotive fuses is as follows:

1) According to the appearance characteristics of fuses, they can be divided into:

Bladefuses. It consists of two blade-shaped plug-type input and output terminals, an electrical conductor composed of a fuse, and an insulator component. Also known as plug-type, blade-type, blade-type fuses.  

Cartridgefuses. It is composed of two piece-shaped socket input and output terminals, an electrical conductor composed of a fuse and a combined insulator assembly. Also called socket fuses and box fuses.    

Screw down fuses (boltdownfuses). It consists of two blade-shaped plug-type input and output terminals suitable for screw connection, an electrical conductor composed of a fuse and a combined insulator assembly. Also known as a bolt-on fuse.   

According to the characteristics of fuse blown, it can be divided into:

Quick melt type. Suitable for small current and short-time pulse current loads.

Image: Common fast-acting fuses

Slow melt type. Suitable for large current and long-term pulse current loads.

Image: Common slow-blow fuses

Simple instructions：

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