Miniature fuses are primarily used in digital cameras, laptops, mobile phones, and other electronic products. From traditional glass tube fuses to miniature fuses, the selection focus varies slightly due to differences in product technology. The selection of miniature fuses involves the following elements: The normal operating current of the circuit should not exceed 75% of the rated current of the fuse. 2. Pulse, pulse current, surge current, starting current, and circuit transient values. Micro fuses are particularly concerned about this. Due to technological reasons brought about by small-scale, the impact resistance of miniature fuses is much lower than that of glass tube fuses or other larger fuses with the same rated current. 3. The size of the overload current and the minimum and maximum duration of the overload current in the circuit generally require oscilloscope testing and theoretical calculations to determine the size of the overload current. The basic requirement fo
Due to the fact that the intelligent control part of this new type of LED explosion-proof light is completed through RS485 serial communication, it was found in practical applications that the 485 interface chip is easily burned out. After analysis, overvoltage protection was not done properly, so TVS tube was selected as the overvoltage protection circuit, and it was found that it is still easy to be burned out by lightning. When I was in a state of exhaustion, I saw an overcurrent protection scheme using a self recovery fuse TVS tube. The experiment was successful, greatly improving the reliability of the explosion-proof lamp. I didn't expect to use a self recovery fuse PPTC in series at port 485, and then connect TVS in parallel to complete the task. There is no simpler solution than this method. The self restoring fuse PPTC is an overcurrent protector, also known as a ten thousand fuse, also known as a self resetting overcurrent protector or a polymer self restoring fuse. Whe
Explosion proof lamps should use self restoring fuses as over temperature and over current protectors, which not only achieve the purpose of self resetting over current protectors, but also have low cost, maintenance free, and long service life. Due to the simple design of using self restoring fuses for overcurrent protection of explosion-proof lamps, only one component is required to complete the self resetting overcurrent protector function, with high reliability. Using a self restoring fuse is equivalent to replacing at least 6000 glass fuse tubes to complete the overcurrent protection task, greatly enhancing the market competitiveness of explosion-proof lamps due to the application of self restoring fuses. Previously, explosion-proof lamps were mostly made from incandescent lamps and energy-saving lamps through special processes. Now, they have been converted to intelligent control technology products using LED. However, this intelligent LED explosion-proof lamp has one of th
When the circuit is working normally, it has no impact on the protected circuit, and its resistance value is very small, with little power consumption on the circuit. When the circuit is abnormal, the current is too high, or there is a short circuit in the circuit, the fuse can quickly block the excessive current, protecting the safety of the circuit and other components. When there is an abnormality in the circuit, the self recovery fuse activates protection. When the protection is activated, the current in the circuit is not completely interrupted, but momentarily drops to a very small current. At this point, the equipment on the circuit will stop working. After manually powering off and troubleshooting, when the power is restored, the self restoring fuse will automatically return to the state before protection. Without replacing the fuse, the circuit can resume normal operation. If the fault is not resolved or if the fault reoccurs, the self recovery fuse will still activate pr
When choosing fuses, although they are of the same type, there are still differences. For example, the prices, quality, and parameters of fuses produced by domestic, foreign, and different fuse manufacturers may vary. Especially in terms of price, domestic fuses are cheaper than foreign ones. Why is this? There are also reasons from the fuse manufacturer Answer: At the beginning of design, foreign products have strict regulations from research and development, production, to delivery, basically taking into account many external factors. From the selection of raw materials, manufacturing processes, certification applications, and product pricing, customers have a clear understanding. After the product is completed, it can be tested and sold without any problems, and it will quickly gain customer recognition and trust, resulting in a naturally stable price. Domestic fuses are cheap The positioning of domestic products is to first imitate foreign products and produce them, first re
The disposable slow blow fuse 0402 is a very compact patch fuse with a size of only 1 * 0.5mm, which is the smallest fuse in the patch fuse. The BFS0402 series of BDT-FUSE brand from Baodian Tong can be selected for the 0402 disposable slow blow fuse. This series is a surface mount fast melting thin film fuse. The ultra small package (0402 specification) is very suitable for secondary protection of circuits and is suitable for applications with limited space, such as handheld portable electronic devices. This series is lead-free and meets the requirements of the RoHS directive. The BFS0402 series can correspond to a working current range of 0.25A, 0.375A, 0.5A, 0.75A, 1A, 1.25A, 1.5A, 1.75A, 2A, 2.5A, 3A, 3.5A, 4A, 5A, and a working voltage of 32V. The interruption rating under 32VDC is 35A. BFS0402 provides significant protection for sensitive circuits, and the fuse can activate protection within 5 seconds under a 200% overload condition.
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
