What is the function of the fuse resistor?

When it comes to resistors, everyone should not be unfamiliar. When we were in junior high school, we also learned about the role of resistors. Everyone should understand the role of resistors. Now there are more and more resistor brands on the market. Let's take a look Learn more about fuse resistors.

 

1. Introduction to Definition

Definition of fuse resistance: Resistors and fuses are similar in material and structure, and fuse-type resistors have both functions. They can be used as resistors at ordinary times. Once the current is abnormal, they will play the role of fuses to protect machinery and equipment. The cost is reduced due to the dual-purpose function. Fuse resistors can be divided into: metal film fuse resistors, fuse-type wirewound resistors, and fuse-type cement resistors. The power is: 1/4W, 1/2W, 1W, 2W. With the increase of power, the appearance size of the product will continue to increase.

2. Introduction

The resistance value of the fuse resistor is generally small, most of which are less than 1 ohm. It often acts as a sampling resistor in the circuit. At the same time, when a surge occurs, or other large currents are generated, it will play a role in protecting the line, and the fuse will cause the circuit to open. Protective effects. At the same time, most of the fuse resistors are chip type, and the chip fuse resistors with relatively stable performance are generally called Jabesson fuse resistors and Jabesson chip fuse resistors. Products are divided into fast fuse and slow fuse.

Fuse resistance

3. Why is the fuse resistance large?

When the material and shape of the fuse are determined, its resistance R is relatively determined (if its temperature coefficient of resistance is not considered). It heats up when current flows through it, and it heats up over time. The size of the current and resistance determines the rate of heat generation. The structure of the fuse and its installation condition determine the rate of heat dissipation. If the rate of heat generation is less than the rate of heat dissipation, the fuse will not blow. If the rate at which heat is generated is equal to the rate at which heat is dissipated, it will not fuse for a considerable period of time.

The above information is about the fuse resistance. The fuse plays a very important role in our daily household electricity consumption. It can play a protective role for household appliances, especially in the case of unstable voltage. The role is becoming more and more prominent.

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