| Breaking Capacity: | High |
|---|---|
| Type: | Current Fuse |
| Usage: | Electronic |
|
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A fuse is also called a current fuse, and the IEC127 standard defines it as a "fuse-link". It is mainly used for overload protection. If the fuse is properly placed in the circuit, the fuse will fuse and cut off the current when the current rises to a certain height and heat abnormally, which protects the safe operation of the circuit. When the circuit breaks down or is abnormal, the current will continue to rise, and the rising current may damage some important components in the circuit, or it may burn the circuit or even cause a fire. If the fuse is correctly installed in the circuit, the fuse will fuse and cut off the current when the current abnormally rises to a certain height and heat, thereby protecting the safe operation of the circuit.
Generally, a fuse is composed of three parts: one is the melt part, which is the core of the fuse, which cuts off the current when it is blown. The melt of the same type and specification of the fuse should have the same material, the same geometric size, and the resistance value. It should be as small as possible and consistent. The most important thing is to have the same fusing
characteristics. Household fuses are usually made of lead-antimony alloys. The second is the electrode part, usually two. It is an important part of the connection between the melt and the circuit. It must have Good electrical conductivity, should not produce obvious installation contact resistance; third is the bracket part, the melt of the fuse is generally slender and soft, the function of the bracket is to fix the melt and make the three parts a rigid whole for easy installation and use , It must have good mechanical strength, insulation, heat resistance and flame resistance, and should not be broken, deformed, burned, or short-circuited during use.
The working principle of the fuse is that when the current flows through the conductor, the conductor will generate heat because of the resistance of the conductor. And the calorific value follows this formula: Q=0.24I2RT; where Q is the calorific value, 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time for the current to flow through the conductor; according to this formula It is not difficult to see the simple working principle of the fuse. When the material and shape of the fuse are determined, its resistance R is relatively determined (if the temperature coefficient of resistance is not considered). When current flows through it, it will heat up, and its heat will increase with the increase of time. The current and resistance determine the speed of heat generation. The structure of the fuse and its installation status determine the speed 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 of heat generation is equal to the rate of heat dissipation, it will not fuse for a long time. If the rate of heat generation is greater than the rate of heat dissipation, then more and more heat will be generated. And because it has a certain specific heat and quality, the increase in heat is manifested in the increase in temperature. When the temperature rises above the melting point of the fuse, the fuse blows. This is how the fuse works. We should know from this principle that you must carefully study the physical properties of the materials you choose when designing and manufacturing fuses, and ensure that they have consistent geometric dimensions. Because these factors play a crucial role in the normal operation of the fuse. Similarly, when you use it, you must install it correctly.
The fuse protects electronic/electrical equipment from overcurrent/overheating, and avoids serious damage to electronic equipment caused by internal faults.
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advantage:
1.Produce Range
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such as IC,resistor , capacitor , mosfet , diodes, module , LED, relay, lcd. pcb board . and so. the brand involves:SHARP, POWER, , NXP, NS, ON, ST , IR, VISHAY , TOSHIBA, FAIRCHILD,MICROCHIP, ATMEL,EVERYLIGHT all the kinds of electronic component you need will be find in here.
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3.service:
with the "User first, customer first" Company motto, quality assurance , economic price , fast Delivery time is our only faith. we will try our best to make every customer to enjoy the the most flexible,efficient services.We sincere hope that we can seek the common development and cooperation with the customer together to achieve a win-win situation.
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(noted:Not bear any fee and tax of the transportation cost.)
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