According to different usage requirements, fuse tubes can be divided into two types in structure: lead-free fuse tubes and lead-welded fuse tubes. As shown in the figure, lead-free fuse tubes usually need to be used in conjunction with corresponding fuse holders for easy replacement; Lead soldered fuse tubes can be directly soldered onto printed circuit boards or other circuit components, reducing the spatial position of the circuit. The fuse tube can be divided into a glass shell and a hard shell. According to the different melting times, it can be further divided into ordinary fuse tubes, fast melting fuse tubes, and delayed melting fuse tubes. The fusing time of ordinary fuse tubes is relatively slow, but they are inexpensive and can be applied to overcurrent protection circuits with generally low requirements. The biggest characteristic of fast fuse tubes is their short fusing time, which is suitable for situations that require quick circuit disconnection. The delayed fuse tu
The operating principle of a self restoring fuse tube is a dynamic balance of energy. The current flowing through the components of the self restoring fuse tube series generates heat due to the relationship between the self restoring fuse tube series. The heat generated is completely or partially dissipated into the environment, while the heat not dissipated will increase the temperature of the components of the self restoring fuse tube series. The temperature during normal operation is relatively low, and the heat generated and dissipated reaches a balance. The self-healing fuse series components are in a low resistance state, and the self-healing fuse series does not operate. When the current flowing through the self-healing fuse series components increases or the ambient temperature increases, but if the balance between the generated heat and the emitted heat is reached, the self-healing fuse series still does not operate. When the current or ambient temperature increases again
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
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
