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　　　　The structure of a fuse holder mainly consists of the fuse holder body, base, terminals, pins, etc. Below, we will introduce these structures separately.　　The fuse holder body is the main part of the fuse holder, which is usually made of insulating material and can fix the fuse, pins, and terminals. The shape, size, structure, and material selection of the fuse holder body will have a significant impact on the performance and reliability of the fuse holder. The fuse holder body is usually divided into various shapes such as cylindrical, square, rectangular, etc., and different shapes and sizes can be selected according to different application scenarios. In addition, the insulation material of the fuse holder body should have good insulation performance, heat resistance, and chemical corrosion resistance to ensure the safety and reliability of the fuse holder.　　The base of a fuse holder is usually made of metal material, used to fix the fuse holder body, pins, and terminals. The ma

August 01,2023

Application of Type-C Thermistor for Overcurrent Protection.10a mini blade fuse

　　　　USB Type-C (hereinafter referred to as Type-C) is the latest standard for USB connectors. There is no distinction between positive and negative sides, and the data transmission speed can reach up to 10Gbits/second (Gbps), supporting "USB Power Delivery (PD)" power supply. However, as the charging current increases, the likelihood of accidents such as abnormal heating and burning of connectors also increases. So in order to prevent such accidents from happening, it is necessary to equip the TYPE-C with an overcurrent protection element - PPTC thermistor, also known as the PPTC self recovery fuse.　　PPTC is a component that blends carbon into a polymer resin and sandwiches it between metal foils. In normal working conditions, the resistance of PPTC components is much lower than other components in the circuit. Under overcurrent, the resistance of the components increases (acts), thereby reducing the current in the circuit to a value that other circuit components can safely carry. This

August 16,2024

Explanation of Parameters in the PPTC Specification for Self healing Fuses

　　　　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):

September 20,2023

The following are the relevant issues that self recovery fuses can solve in security equipment.air conditioner fuse box outside

　　　　1. Self recovery fuses are used in conjunction with lightning protection components at the power input end for lightning protection and overcurrent protection applications: In this application, the main purpose is to avoid overvoltage damage to related equipment caused by power voltage fluctuations and lightning current interference. (Related reading: What are the application fields of self recovery fuses?)　　2. The application of self recovery fuses in multi branch power supply systems with a single power supply: In this application, it can solve the problem of the entire system being paralyzed due to damage to a single device. In this system, WHPTC can solve the problem of one device (such as a single user in a building intercom) being short circuited, which prevents the entire system from working properly. The ultimate goal is to timely protect and isolate faulty equipment from the system when a short circuit occurs, without affecting the normal operation of other devices. It can

July 21,2023

Calculation method for high-voltage fuses.tv fuse replacement

　　　　For high current protection zones, the selected fuse should have the following performance: ① large capacity, usually in the tens to hundreds of A; ② Capable of withstanding instantaneous high currents and pulses; ③ High safety and reliability; ④ The operating environment temperature is relatively high; ⑤ Good mechanical characteristics.　　1. Selection of fuse type　　Select the appropriate type based on the working environment, size limitations, current characteristics, voltage characteristics, connection method, etc. of the fuse. Usually, high-voltage fuses for electric vehicles use American standard FWH, FWP, and other series.　　2. Determination of fuse parameters　　The rated current value of fuses is usually based on the value at an ambient temperature of 23 ± 5 ℃. In order to meet the actual operating requirements of electric vehicles, it is necessary to modify the rated current value.　　By using the above formula, a preliminary rated current of the fuse can be obtained. However, in

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Fuseless car charger, carefully burn your phone

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2023-04