1. What is the voltage value at both ends of the series connected pptc component in the circuit? 2. What is the average current value of the circuit flowing through the pptc component under normal working conditions? 3. When a circuit experiences a load short circuit, how much will the fault current in the circuit increase, causing damage to the circuit or other components in the circuit? When the circuit load and fault current increase to 10 amperes, the circuit or components in the circuit are damaged, which affects the normal operation of the circuit. Therefore, it is necessary to quickly protect the circuit with pptc components, and the current value at this time is the limit current value. 4. What is the ambient temperature of the circuit? (Because pptc components belong to positive temperature coefficient thermistors and are affected by environmental temperature) 5. How long does the circuit work? (Is the circuit working continuously for a long time (more than 4 hours) or
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
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
