The material of a fuse has a decisive impact on its performance. Based on the search results, we can obtain the following information: Fuses are generally made of silver copper alloy with high resistivity and low melting point. This alloy has good conductivity and melting characteristics, which can quickly melt when the current is too high, thus protecting the circuit. Early fuses were often made of lead antimony alloy, but due to safety reasons, this material has been phased out. When choosing fuse materials, factors to consider include melting point, resistivity, conductivity, mechanical strength, and corrosion resistance. Different application scenarios may require different types of fuses, so the requirements for materials may also vary. In summary, modern fuses are mainly made of silver copper alloy and no longer use lead antimony alloy. When selecting fuse materials, multiple factors should be considered comprehensively to ensure their reliability and safety in specific en
This is very simple. As long as you know the meaning represented by the parameters in the specification book, you can clearly and quickly view the PTC specification book for self recovery fuses. 1. IH (Holding Current): The maximum current that can pass through a polymer thermistor PTC in a static air environment at 25 ℃ when it remains inactive. Under limited environmental conditions, the device can maintain an infinite amount of time without transitioning from a low resistance state to a high resistance state. (If the current passing through PTC is insufficient to cause the PTC to self heat up beyond the Curie temperature, such current is called the non operating current, and the maximum value of the non operating current is called the maximum non operating current) 2. IT (operating current): The minimum steady-state current at which the polymer thermistor PTC operates within a limited time in a static air environment at 25 ℃. 3. Vmax maximum voltage (withstand voltage value):
Compared with NiMH or NICd batteries, lithium-ion batteries have a higher current density and are widely used in various portable devices. Lithium ion batteries are usually very sensitive to overcharging. When the voltage at both ends of the battery is too high during charging, it will increase battery leakage The danger of smoking, burning, and bursting (which is often quite severe). Overcharging may be caused by uncontrolled charging, electrode errors, or Caused by using an incorrect charger. When the charging and discharging current of lithium-ion batteries is too high or there is an external short circuit, internal heating may damage the battery or burn other components, seriously shortening the battery's cycle life. The task of protecting the circuit is to monitor the parameters of the battery's charging and discharging status in response to various possible faults, in order to ensure battery life and efficiency, and to prevent damage to the battery and external devices su
The working principle of a resettable fuse is the dynamic balance of energy. The current flowing through the resettable fuse generates a certain degree of heat due to the thermal effect of the current (there is a resistance value in the resettable fuse). All or part of the heat generated is dissipated into the environment, but the remaining heat will increase the temperature of the resettable fuse element. During normal operation, the temperature is low and the heat generated and dissipated reaches equilibrium. When the resettable fuse is in a low resistance state, it does not work. When the current flowing through it increases or the ambient temperature rises, if the generated and dissipated heat reaches equilibrium, the fuse will remain inactive. If the current or temperature continues to rise at this time, the heat generated will be greater than the heat dissipation, causing a sharp increase in the temperature of the resettable fuse. Therefore, small temperature changes will l
Do you have any good experience to share in selecting self recovering fuses? Self recovery fuse is an overcurrent electronic protection component, which is made of high molecular weight organic polymers under high voltage, high temperature, and sulfurization reaction conditions, mixed with conductive particle materials, and processed through special processes. The main function of a self-healing fuse is to provide overcurrent protection in electrical appliances. Therefore, self recovering fuses have parameters such as withstand voltage, withstand current, maintain current, and action time. Therefore, it is necessary to choose a suitable self recovery fuse based on the voltage, current, and protection current of the product used. The selection method for self recovery fuses is as follows: Firstly, determine the maximum ambient temperature, operating current, maximum operating voltage, required protection current, and action time parameters for the protected circuit to operate nor
Using a fuse that is too small can easily burn out and cause power outages, while using one that is too large may cause damage to electrical equipment. So for safety reasons, to ensure the "safety" of the fuse, the following points should be noted: (1) Do not use fuses that are too thin. Using thin fuses can easily cause the normal current passing through to burn out, resulting in unnecessary power outages; (2) Suitable fuses must be selected and used, and the melting current of fuses is usually 1.5 to 2.0 times the rated current. If the total power of all appliances in a household exceeds 1100 watts during normal electricity use, choose a 5 ampere fuse and use a 20 gauge fuse with a diameter of 0.98 millimeters. When the current exceeds 7.5 amperes to 10 amperes, the fuse will automatically melt to achieve protection; (3) When installing fuses on power switches, live operation is not allowed. The power switch should be pulled open to disconnect the power supply; (4) Wrap the f
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
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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
