Current fuses, we usually call them fuses or fuses. It was first created by Edison, an inventor more than a hundred years ago, at the time just to protect expensive incandescent lamps. But now, its role has been increasing. It can protect electronic or power equipment from being damaged by current or overheating, thus avoiding the electronic equipment from causing more serious consequences due to its own failure. So, do you know which current fuse manufacturer is better? Next, I will take you to understand some of the more good current fuse manufacturers, for everyone to buy reference!
Current fuse classification
According to the points of protection, it can be divided into: over-current protection and over-temperature protection. The fuse used for over-current protection is the fuse (also called limiting fuse) that is usually said. Fuses for overheat protection are commonly referred to as "temperature fuses." The temperature fuse is divided into low melting point alloy shape and temperature trigger shape and memory alloy shape and so on. (The temperature fuse is to prevent the heating device or the easy-to-heat device from being overheated and protected. It responds to the increase in the temperature rise of the electrical device and does not care about the operating current of the circuit. Its operating principle is different from the "current-limiting fuse". .)
According to the use of points, can be divided into: power fuses, machine fuses, electrical instrument fuses (electronic fuses), automotive fuses.
According to the volume, can be divided into: large, medium, small and micro.
According to the rated voltage, it can be divided into: high-voltage fuse, low-voltage fuse and safety voltage fuse.
According to the breaking capacity, can be divided into: high and low breaking capacity fuse.
Divided by shape, can be divided into: flat tubular fuse (can be divided into inner and outer welding fuses), tip tubular fuse, guillotine fuse, spiral fuse, insert fuse, flat fuse, wrap type Fuses, chip fuses.
According to the material points, it can be divided into: glass insurance tube, ceramic insurance tube.
According to the breakdown speed, can be divided into: special slow fuse (usually with TT), slow fuse (usually with T), medium-speed fuse (usually with M), fast fuse (usually with F), special Fast fuse (usually represented by FF).
According to the standard points, it can be divided into: European standard fuse (VDE), US standard fuse (UL), and Japanese standard fuse (PSE).
According to the type, it can be divided into: current (SMD fuse, micro fuse, insert fuse, tubular fuse), temperature fuse (RH [block type], RP [resistance type], RY [metal shell]), resettable fuse (inserts, laminations, patches)
According to the size can be divided into: patch type 0603,0805,1206,1210,1812,2016,2920; non-patch type Φ2.4×7, Φ3×7, Φ3.6×10, Φ4.5×15, Φ5 .0x20, Φ5.16x20, Φ6x25, Φ6x30, Φ6x32, Φ8.5x8, Φ8.5x8x4, Φ10x38, Φ14x51.
Current fuse action
The fuse that was invented by Edison more than 100 years ago was used to protect the then-expensive incandescent lamp. With the development of the times, the fuse protects the electronic/electrical equipment from over-current/overheating and avoids serious damage to the electronic equipment due to internal failure. .
Current fuse working principle
When the current flows through the conductor, the conductor will generate heat because there is a certain resistance in the conductor. 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 when the current flows through the conductor.
When the fuse is energized, the temperature of the melt rises due to the heat converted by the current. When the normal operating current or the allowable overload current is loaded, the heat generated by the current and the radiation/convection/conduction passing through the melt, the housing and the surrounding environment The heat emitted by other means can gradually reach equilibrium; if the heat dissipation rate cannot keep up with the heating rate, these heat will gradually accumulate on the melt, so that the temperature of the melt will rise. Once the temperature reaches and exceeds the melting point of the melt material, it will be Liquefied or vaporized, thus breaking the current, and protecting the circuit and the human body.
Current fuse standard
Current fuses are generally classified according to their safety standards: UL/CSA specifications, IEC specifications, and so on. In the normal case of the UI specification, the fuse is capable of maintaining operation for more than 4 hours, is not within the range of 110% of the rating of the fusing current, and cannot exceed the rated current of 110%. According to the IEC regulations, the fuse can be maintained for more than one hour, and the rated current of the fuse current will not be 150%. The rated current of 150% cannot be exceeded.
Current fuse price
This kind of current fuse in the market is generally between 15 yuan and 20 yuan.
Note: This price is for reference only! Due to geographical differences, of course, the price will be different. For more details on the prices, please refer to the local distributors!
Current fuse manufacturers recommend
1. Dongguan Gongfu Electronic Technology Co., Ltd.
Located in Dongguan City, Guangdong Province, this Gongfu Electronic Technology Co., Ltd. is a company mainly engaged in the development, manufacture, and supply of circuit protection components. The fuses produced by this company are numerous and varied. At the same time, their products meet the ROHS environmental protection requirements and can be used with confidence.
2. Shenzhen Jitongtong Industrial Co., Ltd.
This is a company that specializes in the development, production and sales of SMT plug-in fuses and current fuses. The most important feature is that it can provide technical solutions and can customize and produce according to customers' special needs.
3. Andre Industrial
This is a Hong Kong industrial and trade enterprise established in 2002. Since its establishment, there have been more than ten years, so this current fuse industry already has a wealth of work experience, product quality assurance.
4. Suzhou Hongshixin Mechanical and Electrical Equipment Co., Ltd.
All of the company's current fuses have been safety certified, with low price, good quality and full specifications.
5. Suzhou Fuzhi Technology Co., Ltd.
The company is a Taiwan-funded enterprise and was established in 1997. The experience is extremely rich. It basically counts leading and self-healing fuse manufacturers and designers. Current fuses are diverse and reasonably priced, which is also a good choice.
Editor's summary: When you use an appliance, it will heat up because of its own work or abnormal work. At this time, the fuse will also increase the temperature for this reason. If the temperature inside the appliance is appropriate or does not exceed the rated or safe temperature, the fuse can help balance the heat in the appliance. However, if the speed of heat generation is too fast, the temperature of the fuse keeps rising, and eventually the fuse will vaporize or liquefy. At this time, the current is disconnected, thus ensuring the safety of the circuit and people. Therefore, the fuse still has a great role, in the selection of fuses must be selected national certification and safer manufacturers of large products to ensure safe use.
Siphon principle cooling principle current fuse manufacturers
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