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Fuseless car charger, carefully burn your phone

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2023-04

Many users have told me about buying printers, but when asked which one they want to buy, they can't tell. Before purchasing a printer

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November 08,2023

fast blow or slow blow fuse for multimeter.What are the standard requirements for self restoring fuse technology?

Self recovery fuse is a type of overcurrent electronic protection component, which is made by mixing conductive particle materials with polymer organic polymers under high pressure, high temperature, and vulcanization reaction conditions, and processed through special processes. What are the standard requirements for self restoring fuse technology? 1. The rated zero power resistance PPTC thermistor should be packaged in different levels according to the zero power resistance, and the resistance range should be indicated on the outer packaging. After the withstand voltage and current resistance tests, the change rate of the resistance before each group of samples is extremely poor δ| After Ri - Before Ri - (After Rj - Before Rj)/Before Rj| 2. The PTC effect refers to a material with a Positive Temperature Coefficient (PTC) effect, which means that the resistance of the material increases with increasing temperature. Most metal materials have the PTC effect. In these materials, the

July 05,2023

Appearance of fuses.solar thermal controller wifi

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=I2RT; 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 a fuse. When the material and shape of the fuse are determined, its resistance R is relatively determined (without considering its resistance temperature coefficient). When an electric current flows through it, it generates heat, and as time increases, its heat also increases. The magnitude of current and resistance determines the rate of heat generation, while the construction and installation of a fuse determine the rate of heat dissipation. If the rate of heat generation is less than the rate of heat dissipation, the fuse will not blo

November 11,2023

air conditioner fuse box replacement..Application scope of patch self recovery insurance

Self recovery fuses can be divided into patch based self recovery fuses and plug-in self recovery fuses. With the increasing miniaturization of product requirements, the range of use of patch based fuses has increased. The main encapsulation of SMD self recovery fuses are: 0805, 0603, 1206, 1812, 2920, and their working principle is: The self recovery fuse is composed of specially treated polymer resin and conductive particles (Carbon Black) distributed inside. Under normal operation, the polymer resin tightly binds conductive particles outside the crystalline structure, forming a chain like conductive electrical pathway. At this time, the recoverable fuse is in a low resistance state (a), and the heat generated by the current flowing through the self recovering fuse on the circuit is small and does not change the crystal structure. When a circuit experiences a short circuit or overload, the heat generated by the large current flowing through the self recovery fuse causes the pol

November 09,2023

temperature balancing mattress protector.The difference between fast break patch fuse and slow break patch fuse

The main difference between slow fuse and fast fuse is its ability to withstand instantaneous pulse current, which means that it can resist the impact of surge current when switching on and off, thereby ensuring the normal operation of the equipment. Therefore, slow fuse is often referred to as surge resistant fuse. From a technical perspective, slow melting fuses have a large melting heat value of I2t, and the energy required for fuse melting is relatively high. Therefore, for fuses with the same rated current, slow melting has a much stronger ability to withstand pulses than fast melting. Due to the fact that the I2t of a slow fuse is larger than that of a fast fuse of the same specification, the fusing time in the event of overcurrent in the circuit will also be slower than that of a fast fuse. Is it possible that the protection performance may be worse than some people are concerned about? We said no! Because once a circuit malfunctions, the overcurrent will not disappear on i

July 29,2024

Classification of fuses

Fuse is a key component used for circuit protection, mainly to cut off the current when the circuit is overloaded or short circuited, in order to protect the safety of electrical equipment. According to different applications and characteristics, fuses can be divided into the following three categories: 1. Plug in fuse: This type of fuse is usually used in cars and some household appliances. Its characteristics are easy installation and easy replacement. The plug-in fuse has a rated current value, and the selection needs to be matched according to the operating current of the circuit. 2. Spiral fuse: This type of fuse is commonly found in old-fashioned electrical equipment, characterized by the fuse being wrapped around a ceramic core and then wrapped in a layer of glass or plastic shell. The replacement of spiral fuses is relatively complex, but they have strong resistance to high voltage and high current. 3. Surface mount fuses: With the development of electronic technology, s