Briefly talk about car fuses

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Briefly talk about car fuses [Copy link]

What is a car fuse? Fuse is what we are used to calling it, and its official name is "fuse". The purpose of a car fuse is similar to that of a fuse at home. When the circuit current is abnormal and exceeds its rated current, it will melt and act as a circuit protection barrier. Car fuses are roughly divided into two types: fast-blow fuses and slow-blow fuses.

Commonly used fuses in automobiles include high current fuses and medium and low current fuses.

Medium and low current fuses are generally easier to access.

Medium and low current fuses can be roughly divided into chip fuses (including automatic fuse box mini fuses), plug-in fuses, screw-in fuses, tube fuse box flat fuses. Among them, the ones we can get are medium-sized ATO or small fast-blow chip fuses. Chip fuses can carry small currents and short-time pulse currents, such as headlight circuits, rear glass defrosting, etc.

How do automotive fuses work? Fuses have two important working parameters: rated current and rated voltage. When using them, you should choose the corresponding fuse according to the current and voltage of the circuit.

In terms of structure, the general automotive fuse adopts a plug-in design. The fuse has an engineering plastic shell, which wraps a melt structure made of zinc or copper, and the metal melt is connected to the pin. The specifications of automotive plug-in fuses are generally 2A to 40A, and the ampere value will be marked on the top of the fuse. If the fuse is burned out and the ampere value cannot be identified, we can also judge it by its color.

The international standard for the color of automotive chip fuses is: 2A gray, 3A purple, 4A pink, 5A orange, 7.5A brown, 10A red, 15A blue, 20A yellow, 25A transparent colorless, 30A green and 40A dark orange. Different amperes can be clearly distinguished by different colors.

Since there are many parts and electronic devices in a car, and each device is equipped with a fuse, in order to facilitate future maintenance, the designer of each car will concentrate the car fuses in one place at the beginning of the design, and this place is called a fuse box. Generally, a car has two fuse boxes, one is located in the engine compartment, which is responsible for the fuses of the car's external electrical appliances, such as the engine control unit, horn, glass washer, ABS, headlights, etc.; the other is near the left side of the driver, managing the electrical appliances in the car, such as window lifts, airbags, electric seats, cigarette lighters, etc.

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The automotive fuse is a type of current fuse. Its main function is to automatically fuse when the current in the circuit exceeds its rated current, thus protecting the circuit. In addition to being used in automotive circuits, it is also often used for overcurrent protection of industrial equipment. The automotive circuit is composed of many electrical devices connected by wires of different colors, among which the fuse is the most important. In fact, the fuse is just a customary name, and it is called a fuse in the industry standard.

There are many types of fuses. Automotive fuses are obviously used in cars. Compared with automotive fuses, they also have many series of products and can be divided into many other types, mainly the following:

Plug-in fuse: It can be divided into extra-small, small, medium and large automotive fuses. Its specifications can be divided into rated current of 1-40 amperes, large 30-120 amperes, and rated voltage of 32 volts.

Forkbolt fuse: It can be divided into small and large forkbolt fuses, with rated currents ranging from 30-150 amperes to large 40-800 amperes, and rated voltages of 32/125 volts.

Automobile glass tube fuse: It can be divided into 6.35×30mm, 6.35×31.75mm and 10×38mm glass tube fuses, with rated currents of 0.5-20 amperes, 10×38mm 20-80 amperes, and a rated voltage of 32 volts.

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qwqwqw2088

The fuse color standard is good.

When you encounter color blindness, you will be blinded

gmchen

qwqwqw2088 posted on 2019-11-22 07:57 The color standard of fuse is good, but it is useless when encountering color blind people

Color blind people are not allowed to drive