The first function of a good fuse is maintenance. In general, the additional current of a fuse must be greater than the normal operating current of the circuit and have a certain overload capacity, but the margin cannot be too large. The second function of a good fuse is its load-bearing function. This is commonly referred to as the ability to withstand pulses. During the use of fuses, there is a greater chance of normal current fluctuations or instantaneous pulses than fault overcurrent, which is particularly important for the use of fuses. The third function of a good fuse is its safety function. A high-quality and reliable fuse should ensure safety before, during, and after its operation, that is, safely conducting and safely fusing. In summary, appropriate fusing characteristics and additional current; Satisfactory and reasonable melting heat energy value; Proper breaking ability, additional voltage, and safety certification are necessary conditions to ensure the main functio
Self recovery fuse is a special material made with automatic recovery function. After a circuit failure, the current increases, and the self recovery fuse will change its structure to block the current, achieving the effect of protecting the circuit. Some people think that installing a self restoring fuse in the circuit can automatically solve the problem of circuit faults. Next, the editor will answer for everyone. Although self restoring fuses can protect circuits from being damaged by overcurrent, they cannot completely solve the problem of circuit faults. After a circuit malfunction occurs, the fuse blocks the current, and after a period of time, it will automatically restore its own structure and reconnect the circuit. If you do not solve the problem of an increase in current caused by a circuit malfunction, the self recovery fuse will operate again and again until the fuse is damaged. So can self restoring fuses solve circuit faults? In fact, self recovery fuses are only su
The segmented capacity of the 1206 series 40A disposable fuse is as follows. When the current passing through the fuse is 40A, the fuse can maintain internal fusing for at least 4 hours. However, when the current passing through the fuse is 3.5 times the rated current, which is 140A, the fuse will fuse within 5 seconds, thereby protecting the board. The size specification of this part number is: 3.2mm * 1.6mm, with a thickness of 0.75mm The 1206 series 40A disposable fuse has set industry standards in terms of performance, reliability, and quality. The solderless design provides excellent switching and temperature cycling characteristics during use, and enables our SMD fuses to have higher heat resistance and impact resistance than other subminiature fuses. The main characteristics of the 1206 series 40A disposable fuse include: ① rapid fusing; ② Reflow soldering and wave soldering are compatible; ③ Ceramic and glass structures; ④ It belongs to the disposable fuse type; ⑤ Lead fr
The appearance dimensions of the 251 series fuses are available in multiple models: 2 * 6mm, 2.4 * 7mm, 3 * 9mm, and 2.5 * 6mm. 251 series axial lead fuse, size 2.4 × 7mm, small in size, suitable for various small electrical appliances. The rated voltage range is 125V~250V, and the rated current range is 125mA~6.3A. The appearance of the 251 series resistive fuses is composed of brass nickel plated copper caps and leads, ceramic tubes, etc. The product body colors are green and yellow, among which the appearance of 2 * 6mm and 3 * 9mm resistive fuses is marked with a color ring to distinguish the size of the current. It is a special fast break fuse. The 251 series resistive fuses have a wide range of applications in the industry and circuits, and can be used in current supplies, switching power supplies, computers, chargers, telephones, household appliances, communication products, various instruments and electronic components, motor products, and various small household applia
In a switching power supply circuit, the power input terminal generally uses a regular fuse (fuse, fuse resistance) in series with the circuit of the power input terminal. When an overcurrent fault occurs in the power circuit, the fuse will blow, disconnecting the power input circuit to avoid damaging large components. The markings on the circuit board are generally fuses, similar to resistance markings, but the terminal leads pass through a rectangular box (resistance markings do not pass through). I'm not saying you don't have this ability, but electricity is very dangerous. The fuses are all on the side of the mains. If you accidentally turn on the power, and if the machine's malfunction is not resolved, you will replace the fuse, which is likely to explode again. If the fixed value of the fuse you replace is too large, it is not a fuse. The fuse has a resistance value. In fact, there is resistance to the wire, but the resistance of the wire is very small (the nature of the wir
1. Working environment temperature: Excessive ambient temperature can damage the lifespan of fuses. Slow melting fuses, such as tin ball type, begin to diffuse towards the metal wire when the temperature is about 160 ℃ (150-170 ℃); The temperature at which the melt of a fast melting fuse begins to undergo severe oxidation is approximately 200 ℃ (175-225 ℃). With the oxidation of the fuse from the outside to the inside, multiple diffusion, thermal stress fatigue, etc., the lifespan of the fuse will gradually shorten. Therefore, it is recommended that the delay type fuse fuse should not work above 150 ℃ for a long time, and the fast melting type fuse should not work above 175~225 ℃ for a long time. 2. Pulse current: Pulse impact can generate thermal cycling, leading to diffusion, oxidation, thermal stress, and even acceleration of the fuse. The fuse will gradually age with increasing pulse energy and frequency. The impact resistance life of a fuse depends on the percentage of I2t of
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
