We all know that when current flows through a conductor, it will generate heat due to the presence of a certain resistance in the conductor. And the calorific value follows this formula: Q=0.24I2RT; Where Q is the heat generated, 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 for the current to flow through the conductor; Based on this formula, we can easily see the simple working principle of Shenzhen fuses. Once the material and shape of the fuse are determined, its resistance R is relatively determined (without considering its resistance temperature coefficient). When current flows through a fuse, it will generate heat, and as time increases, its heat also increases. The magnitude of current and resistance determines the speed at which a fuse generates heat, while the construction and installation of a fuse determine the speed at which heat is dissipated. If the speed at which heat is generated is less
1： The testing process is as follows: 1. Initial internal resistance Rimin measurement: Unpack, take out the fuse, and measure the internal resistance of the fuse; 2. Welding: Solder the fuse onto the PCB through reflow soldering, with leads connected to the PCB for easy electrical performance testing; 3. Hold current IHold test: Select a DC constant voltage and current source for testing. Adjust the voltage to the voltage Vmax specified in the specification, Adjust the current to the holding current Ihold specified in the specification and power on for 15 minutes; 4. Action current Itrip test: Select a DC constant voltage and current source for testing. Adjust the voltage to the voltage Vmax specified in the specification, Adjust the current to the holding current Itrip specified in the specification and power on for 5 minutes; 5. R1max test: Cool the activated fuse for 1 hour and measure the internal resistance of the fuse. 2： Test standards: 1. The testing environment i
Application of Self Recovery Fuse in RS485 Communication Port Lightning Protection RS485, as one of the most commonly used serial differential communication methods in the industry, adopts a balanced transmission and differential reception method, which has the ability to suppress common mode interference. Due to its long communication distance (over 1200m), high transmission rate (10Mbps), high signal-to-noise ratio, convenient control, low cost, and the ability to achieve multiple nodes on a single bus, as well as the variety of transceivers that can be used, RS485 has the advantages of being able to suppress common mode interference, It has been increasingly recognized by users. However, with the increase in usage frequency, the problems encountered are also increasing day by day. Due to the fact that RS485 communication transmission lines are usually exposed outdoors, lightning and electrostatic interference have become common problems in practical engineering of RS485 commun
A professional enterprise engaged in the research and development, production, and sales of patch fuses and plug-in fuses. All products meet the requirements of lead-free and halogen-free environmental protection, and have obtained foreign authoritative safety certification such as UL, VDE, TUV, etc. The products are widely used in industries such as computers, communication, security, automobiles, toys, and household appliances. Main supply products: self recovery fuses, disposable fuses, patch fuses, plug-in fuses, Litteluse Litteluse fuses. The miniature fuse meets the following conditions: 1. Power on capacity: Power on at rated current for 1 hour without fusing. 2. Temperature rise: When energized according to the rated current, the ground temperature rise is less than 75 ℃. 3. Fusing test: Fusing within 1 minute at twice the rated current. 4. Breaking capacity: When the rated breaking capacity is added, there will be no continuous arcing or ignition. This product can b
Chip low-voltage fuse is a type of fuse, abbreviated as chip low-voltage fuse. The function of a low-voltage fuse is to provide short circuit protection in the circuit. Its advantages include high breaking capacity, strong reliability, small installation area, convenient maintenance, and low price. The disadvantage is that there are few protection methods and the recovery time of power supply is long. Baodian Tong's main chip fuse How to Select Low Voltage Fuses with Chip Mounts Commonly used low-voltage fuses include various types such as porcelain plug type, sealed tube type, spiral type, filler type, and so on. The ceramic plug type has poor arc extinguishing ability and is only suitable for use at the end of lines with small fault currents. Other types of fuses have arc extinguishing measures, with strong current breaking ability. The closed tube structure is simple, and the spiral type is safer when replacing the fuse tube. The filling material type has stronger current brea
Voltage rating: The voltage rating of a fuse must be equal to or greater than the effective circuit voltage. The standard voltage rating series for general patch fuses are 24V, 32V, 48V, 63V, and 125V. Resistance: The resistance of a fuse is not very important in the entire circuit. But for fuses with an amperage less than 1, the resistance will be a few tenths of an ohm, so this issue should be considered when using fuses in low-voltage circuits. Most fuses are made of positive temperature coefficient materials, so there are also two types of resistors: cold resistance and thermal resistance. Environmental temperature: Fuses are temperature sensitive components. The current carrying capacity of the fuse was tested at an ambient temperature of 25 ℃. The higher the ambient temperature, the higher the operating temperature of the fuse, the lower the current carrying capacity of the fuse, and the shorter its lifespan. On the contrary, at relatively low temperatures, the lifespan 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
