A power fuse is a type of fuse, which refers to an electrical appliance that fuses the fuse with the heat generated by itself when the current exceeds a specified value and breaks the circuit. The fuse is based on the current exceeding the specified value for a period of time, using its own heat to melt the melt, thereby breaking the circuit; a current protector made by using this principle.

Fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As a short-circuit and over-current protector, it is one of the most commonly used protection devices.

The working principle of the fuse is a simple relationship between I2R and time. The greater the current, the shorter the fusing or open circuit time. The power consumption of the fuse is proportional to the square of the current through the fuse. When the power consumption is too high, the fuse is blown. This feature also applies to wiring harnesses protected by fuses. If the heat generated exceeds the heat radiated, the temperature of the fuse will increase. When the temperature rises to the melting point of the fuse of the fuse, the fuse will blow, that is, the circuit will be opened to protect it.

The structure of the power fuse is roughly the same as the structure of the fuse. It is mainly composed of 3 parts: melt, shell and support, among which melt is the key element to control the fusing characteristics. The material, size and shape of the melt determine the fusing characteristics. Melt materials are divided into two types: low melting point and high melting point. Low melting point materials such as lead and lead alloys have a low melting point and are easy to fuse. Due to their large resistivity, the cross-sectional size of the melt is larger, and more metal vapor is generated during fuse. It is only suitable for fuse with low breaking capacity. Device. High melting point materials such as copper and silver have high melting points and are not easy to fuse, but due to their low resistivity, they can be made into a smaller cross-sectional size than low melting point melts, and produce less metal vapor during fuse, which is suitable for high breaking Capable fuse. The shape of the melt is divided into two types: filament and ribbon. Changing the shape of the variable cross-section can significantly change the fusing characteristics of the fuse.

dc fuse Delivery Time:

3-15 days after confirming order,detail delivery date should be decided according to production season and order quantity.

dc fuse Shipping:

1. Shipment port:SHANGHAI/NINGBO
2. By Air or by Sea for batch goods,Airport/ Port receiving;
3. Customers specifying freight forwarders or negotiable shipping methods!