Chip fuses can be divided into 9 categories based on their volume size: 0402 volume, 0603 volume, 0805 volume, 1206 volume, 1210 volume, 1812 volume, 2410 volume, 2920 volume, and 4012 volume. The most commonly used volumes for SMD fuses are 1206, 18122410, and 0603, followed only by a small amount of remaining volume. The commonly used models for SMD self recovery fuse 1206 include ASMD1206-020 (0.2A/24V), ASMD1206-025 (0.25A/16V), ASMD1206-050 (0.5A/6V), ASMD1206-050-16V (0.5A/16V), ASMD1206-050-24V (0.5A/24V), ASMD1206-075 (0.75A/6V), ASMD1206-100 (1A/6V), ASMD1206-150 (1.5A/6V), ASMD1206-200 (2A/6V), and ASMD1206-300 (3A/6V). The commonly used models for SMD self recovery fuse 1812 include ASMD1812-010, ASMD1812-020, ASMD1812-050, ASMD1812-050-30, ASMD1812-075, ASMD1812-110, ASMD1812-110-16, ASMD1812-150, ASMD1812-200, ASMD1812-300, and ASMD1812-350. The commonly used models for SMD self recovery fuse 0603 are ASMD0603-010, ASMD0603-020, ASMD0603-050, and ASMD0603-075. The
In application, step-up transformers are mainly used in instruments and meters; For the power supply of electronic products, the majority of self recovery fuses are actually step-down transformers. Structurally, the transformer is composed of stacked silicon steel sheets and primary coils. The coil is mostly wound with enameled copper wire, and now it is also used with enameled aluminum wire. Power transformers are commonly used components in electronic products and are widely used due to their simplicity and ease of manufacture. There are two types of transformers: step-up transformers and step-down transformers (excluding impedance transformers and line matching transformers). They are also called linear transformers because they increase or decrease the original AC voltage proportionally and output it to the load for power supply. For step-down transformers, their characteristics are: the primary input is 220V, the secondary output is low-voltage, the secondary current is small,
The utility model is a direct plug-in fuse tube, which belongs to the emergency protection device of a circuit, and is composed of a glass tube, a fuse wire, and a copper cap. Generally, emergency protection devices for low-voltage power supply often use knife switches, porcelain fuse boxes, or combination sockets with fuses. It is necessary to open the box cover or unplug the plug to determine whether the fuse of this type of protector has been burned out. However, replacing the fuse requires some tools to replace it, which is quite difficult to lock. In addition, when the fuse is burned out, it generates large sparks, which can easily cause the porcelain body to burn black, bakelite and plastic parts to burn and deform, Especially when the combined socket is burnt and deformed, it cannot be repaired and can only be replaced as a whole, causing significant waste. For some low-power household appliances, instruments, and equipment, fuse tubes are often installed inside, and the f
Firstly, normal current: Firstly, we must know the fuse that flows through the circuit chip used in normal current. Usually, we need to reduce the difference between the predetermined amount and then follow the selection principle: the normal current must be less than the rated current and the product's derating factor. Secondly, the fusing current: According to UL standards, patch fuses (fuses) should be able to quickly operate at twice the rated current. But in most cases, to ensure reliable fuses, we recommend that the fusing current be greater than 2.5 times the rated current. In addition, the fusing time is very important, and a judgment must also be made based on the manufacturer's fusing characteristics. Thirdly, short-circuit current: the maximum current value, when we call it the short-circuit current of a short circuit. The rated breaking capacity of various fuses is necessary, and we must be careful not to choose fuses with circuit currents exceeding the rated breaking
In the past few years, surface mount fuses have been the most valuable variety among small fuses, but the price competition they face is also fierce. The average unit price of the product has decreased by 20-30%. In recent years, while surface mount fuses have gained widespread popularity, they have also made continuous breakthroughs and innovations in technology. From the perspective of global fuse production distribution, a large proportion of electronic assembly factories are located in China, with over 40% of actual applications in China. The main market of surface mount fuses is in Asia, and is concentrated in Chinese Mainland, Taiwan, Japan and South Korea. Many Japanese and South Korean companies also have factories in China, making China an important market for surface mount fuses. The actual annual consumption of surface mount fuses in the former Greater China region (including Japanese, Korean, Hong Kong and Taiwan funded factories in Chinese Mainland) accounts for abou
Overcurrent circuit protection can be achieved by using traditional fuses or using self recovery and self recovery fuses developed by *. Both achieve protection by reacting to the heating phenomenon generated by excessive current in the circuit. Fuses break the current by blowing, while self restoring fuses rely on changing from a low resistance state to a high resistance state to limit the magnitude of the current. Fully understanding the performance differences between the two devices will make it easier for you to choose a circuit protection scheme. The difference between the two is that the self recovery fuse can self recover. The general self recovery step after overload is to cut off the power supply and cool the device. There are other differences in operational characteristics between the two products. The terminology used for self restoring fuses is usually similar to that used for fuses, but not entirely consistent. For example, the parameters of leakage current and brea
Traditional fuses have a characteristic: if pulse currents and high temperature fluctuations occur, their properties will change. Every pulse and temperature fluctuation occurs, the performance of the fuse is weakened, and SCHURTER's UAI 1206 is not affected by this due to its special fuse structure. SCHURTER refers to it as "trace in air" technology, and the ability of the UAI to resist current pulses smaller than the melting heat value (I2t) is greatly improved. UAI 1206 does not actually require general derating use. In addition, due to its unique design, the fuse can greatly suppress temperature fluctuations. The design of UAI 1206 complies with UL 248-14 standards and was originally developed specifically for automotive applications. There are two versions of this product, with rated currents of 5.3 A and 7.5 A, and a rated voltage of 32 VDC. The rated breaking capacity is 100 A. UAI 1206 meets all requirements of the AEC-Q200 standard. Even in the event of high levels of pul
1. Rated current: The rated working current of the fuse tube (the maximum current of the fuse that can maintain normal operation for a long time under normal circumstances). 2. Rated voltage: The rated working voltage of a fuse (the maximum voltage that can be safely withstood when the fuse is disconnected). When selecting a fuse, the rated voltage of the selected fuse should be greater than the input voltage of the protective circuit. 3. Breaking capacity: When a large overload current (such as a strong short circuit) occurs in a circuit, the fuse can safely cut off the maximum current of the circuit. It is an important safety indicator for fuses. Safe disconnection refers to the absence of phenomena such as splashing, combustion, explosion, etc. that endanger surrounding components, components, and even personal safety in a circuit breaker. 4. Overload capacity (carrying capacity): The maximum overload current that a fuse can maintain operation for a specified period of time.
When determining the material and shape of a fuse, its resistance R is relatively certain (regardless of its resistance temperature coefficient). When an electric current flows through it, it will heat up, and as time increases, the heat will also increase. The current and resistance determine the speed of heating, while the structure and installation of the fuse determine the speed of heat dissipation. If the speed of heating is less than the speed of heat dissipation, the fuse will not blow. If the rate of heat generation is equal to the rate of heat dissipation, it will not melt for a considerable period of time. If the heat generated is greater than the heat dissipated, more and more heat will be generated. Due to its certain specific heat and mass, the increase in heat is manifested as an increase in temperature. When the temperature rises above the melting point of the fuse, the fuse will melt. That's how fuses work. We should know from this principle that when designing and
Recoverable fuses are divided into patch self recovery fuses and plug-in self recovery fuses. With the increasing miniaturization of product demand, recyclable patch fuses have been increasingly widely used. The recyclable patch fuse is a new type with high technological content in the small fuse industry. Today we will introduce you to what is a recoverable patch fuse. Made of high-tech polymer resin and nano conductive particles through special processing, a repairable patch fuse is made. Normally, nanoconductive crystals form a chain conductive path with resin chains, and the fuse operates normally. When the circuit is short circuited or overloaded, the high current passing through the fuse increases the collection temperature. When the Curie temperature reaches, the density of states rapidly decreases, the phase transition increases, and the internal conductive chain undergoes changes or fractures in an avalanche state. The fuse moves to a high resistance state step by step, a
Can surge thyristors and discharge tubes only be used for transient overvoltage protection, while polymer positive temperature coefficient self recovery fuses can only be used for overcurrent protection? So what is the maximum current and voltage they can withstand? Generally speaking, traditional overvoltage protection devices are mainly used for transient overvoltage protection, but they are also suitable for long-term voltage stabilization conditions that do not exceed their rated power. Self recovery fuses can not only be used for overcurrent protection, but also for temperature protection or protection under the combined action of current/temperature. In addition, they can also be used in conjunction with IC for temperature detection and feedback of temperature signals for protection. At present, the maximum voltage that the self recovery fuse can withstand is 600Vrms, and the maximum holding current is 15A; The maximum voltage of PPTC for automobiles is 60Vdc, and the maxi
(1) When used at room temperature of 25 ℃, know the actual average working current I and voltage V at the location where PPTC is installed, regardless of instantaneous current (2) Select a self restoring fuse series component based on the I value, V value, product category, and installation method (DIP or SMD). (3) If the internal environmental temperature of the device is greater than 25 ℃, the self resetting fuse will reduce the passing current as the temperature increases. To maintain normal load current passing, according to the reduction rate comparison table, calculate Ih (no action current)=I/reduction rate. (4) Select the fuse series components according to step (2), and select the corresponding components from the specification table based on the calculated IH value in step (3). It should be emphasized that the IH value of the selected component must be greater than or equal to the IH value calculated in step (3).
Self recovery fuses can be divided into two types based on material: polymer polymer PPTC and ceramic CPTC. They can also be divided into two types based on packaging form: lead inserts and SMD patches. It can also be divided into 600V, 250V, 130V, 120V, 72V, 60V, 30V, 24V, 16V, 6V, etc. based on the voltage. The main advantages of polymer PPTC are: zero power resistance can be made very small at room temperature, high current products only have a few milliohms, low power consumption in the circuit, negligible, and relatively small volume. It can be connected in series in vulnerable circuits for overcurrent protection and temperature fuse, with fast resistance mutation speed, in the order of several milliseconds, small heat capacity, short recovery time, impact resistance, and can be protected for up to 8000 cycles. PTC can be used as a temperature fuse, so it reflects the performance and function of temperature fuses to a certain extent in the circuit. Achieve dual protection fun
The self recovery fuse is composed of specially treated polymer resin and conductive particles (CarbonBlack) 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 self recovery fuse is in a low resistance state (a), and the heat generated by the current flowing through the self recovery 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 polymer resin to melt, rapidly increase in volume, and form a high resistance state (b). The working current rapidly decreases, thereby limiting and protecting the circuit. After troubleshooting, the self recovery fuse cools and crystallizes again, shrinks in volume, and conductive particles form a conductive path again. The self recovery f
1. The patch fuse is connected in series with the circuit, installed vertically, and installed on each phase line; Fuses are not allowed to be installed on the neutral line of two phase three wire or three phase four wire circuits. 2. The power input terminal of the spiral fuse should be connected to the center point of the base, and the output wire should be connected to the threaded shell; This fuse is used in places with vibration. 3. When the power load is greater than 60A and the lighting or heating load (220V) is greater than 100A, tubular fuses should be used. 4. The voltage circuit and electrical control circuit of the electricity meter should be equipped with control fuses. 5. Porcelain plug-in fuses shall be made of qualified lead alloy wire or copper wire, and multiple strands of fuse wire shall not be used instead of a large fuse wire. 6. The fuse should be intact and undamaged, and the contact should be tight and reliable. Combined with the maintenance of the powe
1: It is the continuous decline of the Chinese yuan, the constant hovering of the US dollar exchange rate, and the depreciation of the Chinese yuan 2: There are too many homogeneous products, and in order to win more orders, we can only continuously compress profit margins, which is a common problem in the domestic manufacturing industry 3: After the tax increase in the United States, many orders have been sharply reduced, especially the significant impact of large customer revenue, further forcing fuse factories to compress profit margins and dilute operating expenses in order to maintain normal factory operations 4: A large number of small workshops are squeezing the market and driving down product prices For conventional products, prices are gradually decreasing and profits are constantly compressing, which forces many factories to think about where their future profit points are? How to increase the company's revenue! Fuses are affected by price, where is the future? So ma
Fuses, also known as current fuses, are defined as "fuse links" in the IEC127 standard. It is an electrical appliance installed in a circuit to ensure safe operation of the circuit. It is a type of fuse The fuse material is mainly made of low melting point alloys such as aluminum antimony alloy. Fuses must be easily melted metal wires in order to fuse in a timely manner and provide protection when the current is high, so lead antimony alloy wires are usually used. A general fuse consists of three parts: one is the melt part, which is the core of the fuse and plays a role in cutting off the current when blown. Fuses of the same type and specification should have the same material, geometric size, and resistance value as small and consistent as possible. It is important to have consistent fusing characteristics, and household fuses are commonly made of lead antimony alloy; The second is the electrode part, which usually has two important components that connect the melt to the circ
1. How to choose patch fuses? We mainly specialize in Shenzhen patch fuses (using well-known brands such as litelfuse bussmann to illustrate the commonly used size of patch fuses 1206 2410 0603) Chip fuses are mainly used in electronic products such as digital cameras, laptops, and mobile phones.. From traditional glass tube fuses to micro fuses and chip fuses, the focus of their selection is slightly different due to differences in product technology. (1) The normal working current of the circuit. The working current through the fuse should not exceed 75% of the rated current of the fuse. (2) Pulse, impulse current, surge current, starting current, and circuit transient values. SMD fuses are particularly concerned about this point. Due to the small size of the fuse, the impact resistance of SMD fuses is much lower than that of glass tube fuses or other larger fuses with the same rated current. (3) The magnitude and duration of the overload current in the circuit. Usually, a co
1. Normal operating current. 2. The voltage applied to the fuse. 3. It is necessary to disconnect the current of the fuse. 4. Short and long periods of abnormal current are allowed. 5. The ambient temperature of the fuse. 6. Pulse, impulse current, surge current, starting current, and circuit transient values. 7. Are there any special requirements that exceed the fuse specifications. 8. Dimensional limitations for installation structures. 9. Required certification body. 10. Fuse holder components: fuse clip, installation box, panel installation, etc.
Our self recovery patch fuse 1206 series has a size of 3.2 * 1.6mm, SMD packaging, reel packaging, and a packaging of 3000 pieces. The withstand voltage value ranges from 6V-60V, with a maintenance current of 0.05A-3.5A. As the maintenance current increases, the withstand voltage value also decreases relatively, and the temperature control range is -40+85 ℃. Generally, our fuse testing is conducted at room temperature. When customers actually use it on a board, they should also consider the impact of temperature on the internal resistance of the fuse. Generally speaking, as the temperature increases, the internal resistance also increases, and the speed of fuse protection will also be relatively faster. The volume of 1206 patch is a commonly used volume for patch self recovery fuses, as it is not as large as the volume of 1812, and is also compared to the volume of 0603 and 0805, which can achieve a wider current range and higher voltage withstand value. Our ASMD1206 series is g
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
