Which brand of capacitors is the best?

Teapo - the best among Taiwanese. Sacon - Korean capacitor manufacturer with 8 quality products. GSC - Storm King. Jackcon - Worse than GSC. . . A generation of violent king. OST - Easier to explode, as famous as GSC. . . Famous capacitor brand identification (for reference only) Rubycon (Ruby) Rubycon (Ruby) is produced in Japan and is a well-known brand-name capacitor with excellent quality. The anti-riot pattern is in the shape of the English letter K, with Rubycon (the words NICHICON (you eat chaff)) written on the side. NICHICON is an old capacitor factory in Japan. It became famous at about the same time as the famous RUBYCON. However, its current level is better than RUBYCON. Some, because NICHICON now has aluminum solid polymer conductor capacitors - F55 series. However, compared with brands such as SANYO and CHEMICON, the general indicators of NICHICON capacitors are relatively low. The ESR value of its most high-end products with low ESR is still there. At the level of 10 milliohms (SANYO's tantalum polymer parallel capacitor can reach 5 milliohms). Basically, NICHICON's progress has been very slow. The anti-riot pattern is a cross (the most rubbish copycat capacitors are also cross). nichicon SANYO (Sanyo) SANYO's position in the electrolytic capacitor industry is somewhat like Samsung's position in the digital home appliance industry. Because SANYO has the largest number of capacitor types and output, its R&D technology level is also among the best in terms of performance. , SANYO may not be the most high-end brand, but judging from the comprehensive evaluation of production scale, supply capacity, quality control capabilities and R&D level, SANYO is definitely the leader in the capacitor industry today. It also has a K-shaped anti-riot pattern and the word "sanyo" on the face is NCCNippon. Chemi-con is Nippon Chemical Industry. There is no brand mark on the outer skin of the NCC capacitor, only the model number. However, the motherboard has nothing more than KZG and KZE series anti-riot patterns that resemble the logo of Mercedes-Benz. The corresponding KZG or KZE series PANASONIC will be famous on the side. ) This is the Panasonic we are familiar with. PANASONIC's electrolytic capacitors and ceramic capacitors are very strong. However, Panasonic's high-end products are mainly tantalum solid polymer capacitors, so they are rarely used in general hardware. In addition, Panasonic's electrolyte is very weak. The capacitor GOLD (gold capacitor) series is also very famous. The anti-riot pattern is T-shaped and there is an M mark on the side. HE KY YXF, YXG MV-AX, MV-CX FC (P2, P3, K6 era grade) HD, HV KZE ZL. , ZLH MV-WX FM (P3, K7 era level) HM, HC KZG MBZ MV-WG FJ (K7, P4, K8, P4+ era high-end capacitors) HN KZJ MCZ (higher level capacitors, very rare on the market In China, emerald is still better. Shangzhang is right. Ruby and Nichicon are indeed good in the capacitor industry, but not everyone can afford the price, and the delivery time is very long. At that time, we had a lot of domestic products. Domestic capacitor products can completely replace Xiaonippon products, so why use Xiaonippon products?

Which brand of electrolytic capacitors is good

Hello, I have also been in the capacitor industry for a long time. It’s time. Let me introduce myself. I am a Nichicon original factory staff member, not an agent or trader. Based on my experience and market information feedback, I have compiled some suggestions on how to choose capacitor brands.

For consumer electronics, I personally recommend rubycon. To be honest, ruby ??does a really good job in capacitors below 63V, and its quality and sales are second to none.

For industrial-grade electrolytic capacitors (horns & bolts), it is recommended to choose Nichicon or NCC. These two companies are rivals in this industry. The quality and price are at the same level. In terms of industrial-grade electrolytic capacitors, Nichicon & NCC Have absolute say.

Thin film capacitors, with the rise of photovoltaics and other industries, the requirements for high rated voltages have gradually replaced aluminum electrolysis in this field.

At present, one of the best film capacitors is Germany's EPCOS. Of course, the domestic farad capacitor technology and market are developing rapidly (personally, I think it is the pride of the national industry). Of course, companies like Nichicon & NCC can also make high-quality film capacitors, but the company as a whole has not made this a development center.

What types of capacitors are there?

As one of the passive components, capacitor has the following functions:

1. Used in power circuits to achieve bypass, decoupling, filtering and energy storage. role. The following classifications are detailed:

1. Bypass

The bypass capacitor is an energy storage device that provides energy for local devices. It can even out the output of the voltage regulator and reduce load requirements. Like a small rechargeable battery, the bypass capacitor can be charged and discharged into the device. In order to minimize the impedance, the bypass capacitor should be as close as possible to the power supply pin and ground pin of the load device. This is a good way to prevent ground potential rise and noise caused by excessively large input values. Ground bounce is the voltage drop at the ground connection when a large current burr passes through it.

2. Remove the lotus root

Remove the lotus root, also known as lotus root removal. From a circuit perspective, it can always be distinguished into a driven source and a driven load. If the load capacitance is relatively large, the driving circuit must charge and discharge the capacitor to complete the signal transition. When the rising edge is relatively steep, the current is relatively large, so the driving current will absorb a large power supply current. Since the circuit Inductance and resistance (especially the inductance on the chip pins will cause rebound). Compared with normal conditions, this current is actually a kind of noise, which will affect the normal operation of the front stage. This is the so-called "coupling" .

The decoupling capacitor acts as a "battery" to meet the changes in the drive circuit current and avoid mutual coupling interference. Combining bypass capacitors and decoupling capacitors will make it easier to understand. The bypass capacitor is actually decoupled, but the bypass capacitor generally refers to a high-frequency bypass, which is to provide a low-impedance leakage path for high-frequency switching noise. High-frequency bypass capacitors are generally relatively small, usually 0.1μF, 0.01μF, etc. depending on the resonant frequency; while the capacity of the decoupling capacitor is generally larger, possibly 10μF or greater, depending on the distribution parameters in the circuit and the changes in the drive current. to be sure.

Bypass is to filter the interference in the input signal, while decoupling is to filter the interference of the output signal to prevent the interference signal from returning to the power supply. This should be their essential difference.

3. Filtering

Theoretically (that is, assuming the capacitor is a pure capacitor), the larger the capacitor, the smaller the impedance, and the higher the passing frequency. But in fact, most capacitors exceeding 1μF are electrolytic capacitors, which have a large inductance component, so the impedance will increase when the frequency is high. Sometimes you will see an electrolytic capacitor with a large capacitance connected in parallel with a small capacitor. At this time, the large capacitor passes low frequency and the small capacitor passes high frequency. The function of the capacitor is to pass high frequencies and resist low frequencies, and to pass high frequencies and resist low frequencies. The larger the capacitor, the easier it is for low frequencies to pass, and the larger the capacitor, the easier it is for high frequencies to pass. Specifically used in filtering, large capacitors (1000μF) filter low frequencies, and small capacitors (20pF) filter high frequencies.

Some netizens once compared filter capacitors to "ponds". Since the voltage at both ends of the capacitor will not change suddenly, it can be seen that the higher the frequency of the signal, the greater the attenuation. It can be vividly said that the capacitor is like a pond, and the water volume will not change due to the addition or evaporation of a few drops of water. It converts changes in voltage into changes in current. The higher the frequency, the greater the peak current, thus buffering the voltage. Filtering is the process of charging and discharging.

4. Energy storage

The energy storage capacitor collects charges through the rectifier and transmits the stored energy to the output of the power supply through the converter leads. Aluminum electrolytic capacitors (such as EPCOS's B43504 or B43505) with a voltage rating of 40 to 450 VDC and a capacitance value of 220 to 150 000 μF are more commonly used. Depending on the power requirements, devices are sometimes connected in series, parallel or a combination thereof. For power supplies with power levels exceeding 10KW, larger can-shaped screw terminal capacitors are usually used.

2. Applied to signal circuits, mainly completing the functions of coupling, oscillation/synchronization and time constant:

1. Coupling

For example, The emitter of the transistor amplifier has a self-bias resistor, which at the same time causes the signal to generate a voltage drop and feeds it back to the input terminal to form input-output signal coupling. This resistor is the component that generates coupling. If a capacitor is connected in parallel to both ends of this resistor, due to A capacitor of appropriate capacity has a small impedance to the AC signal, which reduces the coupling effect caused by the resistance, so this capacitor is called a decoupling capacitor.

2. Oscillation/synchronization

Load capacitances including RC, LC oscillators and crystals all fall into this category.

3. Time constant

This is a common integrating circuit composed of R and C connected in series. When the input signal voltage is applied to the input terminal, the voltage on the capacitor (C) gradually increases. And its charging current...>>

Which type of capacitor is best to use as a high-frequency capacitor?

Mica capacitors and ceramic capacitors are best for high frequencies

What types of capacitors are there? What is the function?

There are too many, including dielectric classification, capacitor packaging classification, polarity and non-polarity, and the difference between withstand voltage and capacity. Different materials have different stability. The main function is to communicate with DC. It has the function of storing electricity. It can compensate the power factor in strong electric power. It has a wide range of functions in electronic circuits, such as filtering, oscillation, coupling signals, calculus circuit applications, etc.

Which capacitance meter is better

The larger one is CM9601A, the smaller one is CM7115A, the best-selling model

The former is about 60 yuan, the latter is 50 yuan It’s about RMB 1,000, and the selling price is

Which capacitor manufacturer is better

Our company currently uses ceramic capacitors with safety regulations. Y capacitors are purchased from capacitor manufacturers. I have also seen the factory hardware. The facilities are pretty good

Which ruby ??capacitors are of good quality?

There are only different series of ruby ??capacitors, there is no one that is good or bad

Parameters of different series The choice of different types depends on the project

Ruby is just a brand. The workmanship and materials in Japan are very good, but the prices are very expensive. If it is not for special needs of the project, few people will use it. After all, the cost is too high.

At the same time, there are also many fakes from such big brands on the market

The better brands on the market include sapphire, black diamond, etc.

If you don’t understand, you can ask here, thank you

(There are sapphire capacitors here)

Which capacitor is better, y5v or x5r

This is according to the American electrician According to EIA standards, MLCCs with different dielectric materials are divided into three categories according to temperature stability: ultra-stable grade (industrial) dielectric materials are COG or NPO; stable grade (II) dielectric materials are X7R; usable grade ( Ⅲ) Dielectric material Y5V.

X7R capacitors are called temperature-stable ceramic capacitors. When the temperature is from -55°C to +125°C, the capacitance change is 15%. It should be noted that the capacitor capacity change is non-linear at this time.

The capacity of the X7R capacitor is different under different voltage and frequency conditions. It also changes with time. It changes by about 1%ΔC every 10 years, which means a change of about 5% in 10 years. .

X7R capacitors are mainly used in less demanding industrial applications and under conditions where the capacitance change is acceptable when the voltage changes. Its main feature is that the capacitance can be larger under the same volume.

COG,

The main difference between NPO, X7R, Z5U and Y5V is their different filling media. Under the same volume, the capacitance of capacitors composed of different filling media is different, and the resulting dielectric loss and capacity stability of the capacitor are also different. Therefore, when using capacitors, different capacitors should be selected according to their different functions in the circuit.

1 NPO capacitor

NPO is the most commonly used monolithic ceramic capacitor with temperature compensation characteristics. Its filling medium is composed of rubidium, samarium and some other rare oxides. NPO capacitors are among the most stable in capacitance and dielectric loss. When the temperature is from -55℃ to +125℃, the capacity change is 0±30ppm/℃, and the change in capacitance with frequency is less than ±0.3ΔC. The drift or hysteresis of NPO capacitor is less than ±0.05%,

NPO (COG) multilayer chip ceramic capacitor, it is just a kind of capacitor

COG (Chip On Glass) means that the chip is Bond directly to the glass. This installation method can greatly reduce the size of the LCD module and is easy to mass produce. It is suitable for LCDs in consumer electronic products, such as mobile phones, PDAs and other portable products. This installation method, driven by IC manufacturers, It will be the main connection method between IC and LCD in the future.

Compared with film capacitance greater than ±2%, it is negligible. The typical change in capacity relative to service life is less than ±0.1%. NPO capacitors have different capacitance and dielectric loss characteristics with frequency depending on the packaging form. Large package sizes have better frequency characteristics than small package sizes. The following table gives the selectable capacity range of NPO capacitors.

NPO capacitors are suitable for use as tank capacitors in oscillators and resonators, as well as coupling capacitors in high-frequency circuits.

2 X7R capacitors

X7R capacitors are called temperature-stable ceramic capacitors. When the temperature is from -55°C to +125°C, the capacitance change is 15%. It should be noted that the capacitor capacity change is non-linear at this time.

The capacity of the X7R capacitor is different under different voltage and frequency conditions. It also changes with time. It changes about 1%ΔC every 10 years, which means a change of about 5% in 10 years. .

X7R capacitors are mainly used in less demanding industrial applications, and under conditions where the capacitance change is acceptable when the voltage changes. Its main feature is that the capacitance can be larger under the same volume. The following table gives the selectable capacity range of X7R capacitors.

Three Z5U capacitors

Z5U capacitors are called "universal" ceramic monolithic capacitors. The first thing to consider here is the operating temperature range. The main thing for the Z5U capacitor is its small size and low cost. For the above three types of ceramic monolithic capacitors, the Z5U capacitor has the largest capacitance under the same volume. However, its capacitance is greatly affected by the environment and working conditions, and its aging rate can decrease by up to 5% every 10 years.

Although its capacity is unstable, it has a wide range of applications due to its small size, low equivalent series inductance (ESL) and equivalent series resistance (ESR), and good frequency response. Especially in the application of decoupling circuit. The following table gives the value range of the Z5U capacitor.

Other technical indicators of Z5U capacitors are as follows: Operating temperature range +10℃ --- +85℃ Temperature characteristics +22% ---- -56% Maximum dielectric loss 4%

Four Y5V power...>>

Which type of capacitor should I choose for filter capacitor?

Large electrolytic capacitor