Two Factors Determine the Life of Ceramic Capacitors

Any product equipment has a service life, but the length of service life is affected by many factors. In recent years, the data of ceramic capacitors in the sales field of electronic components has been rising. What factors may affect the service life of ceramic capacitors?

The life of the capacitor is related to the voltage at both ends, the current flowing through the capacitor and the temperature around the capacitor.

Capacitor life decreases with increasing charging voltage. The increase of charging voltage will lead to the increase of electrical stress and temperature on the ceramic dielectric during the charging and discharging process of the capacitor, which will accelerate the development of the discharge channel and increase the leakage current, resulting in the shortening of the life of the capacitor.

The presence of the discharge circuit load slows down the temperature increase of the capacitor, thereby prolonging the life of the capacitor. Under the condition of no-load continuous charge and discharge, to increase the charge and discharge life of the capacitor to 105 times, the charging voltage needs to be reduced to about 70% of the rated voltage; under the condition of continuous charge and discharge with l0Ω load, to increase the discharge life of the ceramic capacitor to 105 times, the charging voltage needs to be reduced to about 80% of the rated voltage.

The life of the capacitor is not the same at different ambient temperatures. The ambient temperature of the capacitor should not be too high or too low, so as to maintain the life of the capacitor.

Therefore, it’s necessary to consider the actual circuit  voltage and environment temperature when choosing ceramic capacitors. It is recommended to select a reliable manufacturer when purchasing electronic components.

We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer.Our factories are ISO 9000 and ISO 14000 certified. If you have technical questions or need samples, please contact us: https://www.jeccapacitor.com/

 The Self-healing Property of Film Capacitors

Film capacitors use metal foil as the electrodes, and plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate as the dielectric. According to the type of plastic film, there are polyethylene capacitors (also called Mylar capacitors), polypropylene capacitors (also called PP capacitors), polystyrene capacitors (also called PS capacitors) and polycarbonate capacitors.

 

Film capacitors have self-healing properties. It is mainly divided into discharge self-healing and electrochemical self-healing. Because of this feature, a film capacitor does not need to be replaced even if it is damaged many times. In many cases, it can heal itself, thus reduce the cost of maintenance, and the time for troubleshooting.

 

While the film capacitor can heal itself, there is one point that everyone needs to pay attention to: the capacitance of the capacitor used is gradually reduced. If the number of self-healing times the film capacitor withstand increases, its capacitance and insulation resistance will decrease, and the loss angle will increase significantly, which will make the capacitor fail more quickly. Therefore, it is necessary to use a film capacitor in proper situation as to avoid triggering the self-healing property of film capacitor.

 

It is necessary to choose a good manufacturer when purchasing film capacitors. We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer.Our factories are ISO 9000 and ISO 14000 certified. If you have technical questions or need samples, please contact us: https://www.jeccapacitor.com/

 Differences Between Varistor 10D 471K and 14D 471K

The resistance value of a varistor changes with the voltage within a certain current and voltage range, and it can also be said to be a resistor whose resistance value is sensitive to voltage. Another English name for varistor is "Voltage Dependent Resistor", abbreviated as "VDR". In Taiwan, varistors are named according to their use, called surge absorbers, or electric shock (surge) suppressors (absorbers). Today, varistors have been widely used in many industries.

10D 471K and 14 D 471K are commonly seen on the body of the varistor. Do you know what they mean?

For 10D 471K, D is added after 10 to refer to the outer diameter of the product size, and for the following “K” after the number, it means the varistor voltage range of ±10%. The varistor 10D 471K refers to the size of the product with a diameter of 10mm, K is the varistor voltage range of ±10%, and 471 means the varistor voltage is 470V.

14D 471K refers to the size of the product with a diameter of 14mm, K is the varistor voltage range of ±10%, and 471 means the varistor voltage is 470V.

The two varistors are only different in product diameter and size, and other parameters are the same. The varistors 10D 471K and 14D 471K can be used instead of each other. In the actual work application, the engineering test shall prevail.

Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

Film Capacitors in LED Lights

LED lighting has become an important light source in daily life. LED lighting products include bulb lamps, fluorescent lamps, street lamps, industrial and mining lamps, etc. Some lighting products have small internal space but high temperature, so the capacitors required are also small, high temperature resistant, and stable in performance. Film capacitors are in line with the requirements of LED lighting products.

The temperature of LED lighting products quickly rises above 80°C after lighting up. Generally, the temperature of film capacitors on the market reaches 85°C. Using film capacitors with low temperature resistance is easy to cause failure of the light due to excessive temperature. JYH HSU (JEC) film capacitors can achieve a temperature above 105°C, which can meet the requirements of high temperature resistance.

There is a type of film capacitor that is more suitable for LED lighting, that is, CBB capacitors. CBB capacitors have non-polarity, small size, large capacitance, good stability, high insulation resistance, excellent frequency characteristics, small dielectric loss, and large temperature coefficient, which are suitable for LED lighting circuits.

The CBB capacitor plays the role of resistance-capacity step-down in the LED lighting circuit. The CBB capacitor in the LED lighting circuit produces capacitive reactance, which limits the excessive operating current. In the LED lighting circuit, the capacitance attenuation of the CBB capacitor is relatively small and the service time is relatively long, which can meet the needs of LED lighting.

LED lighting circuits have high requirements on the quality of film capacitors. Using branded, high-quality film capacitor can ensure the normal use of LED lighting products and reduce unnecessary maintenance costs.

Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

 Why Supercapacitors Can Be Used In New Energy Vehicles

New energy vehicles are currently the hottest topic in the automotive industry. Europe is one of the earlier regions in the global energy transformation. Europe has vigorously developed new energy sources, issued a series of emission regulations and implemented measures to reduce carbon emissions. In June this year, Europe passed the Phase-out of fossil fuel vehicles proposal, which clearly proposed that by 2035, the sale of fuel vehicles would be banned, which further accelerated the process of electrification of European vehicles.

The success of new energy vehicles is also inseparable from the basic components: super capacitors. Supercapacitors can become the new favorite of new energy products because of their own advantages:

1. Green and environmental protection: No matter in terms of raw materials, technology or manufacturing process, super capacitors are pollution-free, green and environmentally friendly, and very friendly to the environment.

2. Long working hours: The supercapacitor has no chemical reaction in the charging and discharging process, which means the process is reversible. Supercapacitors can be recharged hundreds of thousands of times and can work for a long time. Further more, the supercapacitor has stable working performance and is not prone to problems, which can greatly reduce maintenance cost.

3. Wide working temperature range: Supercapacitors can work normally in the environment of -40~70 degrees Celsius. The working temperature range is wide, and they can also be used in extreme environments. The low temperature characteristics are good.

4. High power density: The power density of a supercapacitor is ten or a hundred times that of a battery. In a short period of time, a supercapacitor can discharge hundreds or thousands of amperes of current because the energy storage of the supercapacitor occurs on the surface of the electrode material and will not be affected. The restriction of ion diffusion can realize the rapid storage and release of energy.

Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

 What Does The 102 3KV Mean On Ceramic Capacitor

There are two printings on the ceramic capacitor, one is the nominal capacitance, and the other is the rated working voltage.

What does the ceramic capacitor 102 3KV mean? Let's talk about the two parameters respectively.

1. 102 is the capacitance value, and 102 indicates the capacitance of the capacitor. When the unit is not marked, the default is PF. 102 means 10^2PF, which is 1000PF. The easy-to-remember algorithm is adding two 0s after 10, that is, 1000

2. 3KV indicates the rated working voltage of the capacitor. 3KV is the DC rated withstand voltage of 3000V, and the rated voltage is the voltage when the electrical appliance is working normally. The rated voltage is the best voltage for the electrical appliance to work for a long time.

Therefore, 102 3KV means that the capacitance of this capacitor is 1000PF and the rated working voltage is 3KV.

Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

 What Causes The Varistor To Break Down

A varistor is a resistive component with nonlinear volt-ampere characteristics. It is mainly used for voltage clamping when the circuit is subjected to overvoltage, and absorbs excess current to protect sensitive devices.

The main parameters of varistors are: varistor voltage, flow capacity, junction capacitance, response time, etc. During use, what are the reasons for the damage of the varistor?

How a varistor works:

When the voltage applied to the varistor is lower than its threshold, the current flowing through it is extremely small, which is equivalent to a resistor with infinite resistance. That is, when the voltage applied to it is below its threshold, it acts as an off-state switch. When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, which is equivalent to a resistor with infinitesimal resistance. That is, when the voltage applied to it is higher than its threshold, it acts as a closed switch.

Causes of varistor breakdown: 

①The number of overvoltage protection exceeds the default number.

②Ambient operating temperature is too high.

③The varistor is squeezed so its shape is deformed.

④Whether it has passed the quality certification (inferior production material and process)

⑤The surge energy is too large, exceeding the absorbed power.

These reasons will cause damage to the varistor. When using it, you need to pay attention to its working temperature, the quality of the varistor, and so on. Correct use can reduce unnecessary troubles.

Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

 Industry Chain of Film Capacitors

Film capacitors are familiar to everyone in the electronic component industry. In recent years, many new energy vehicles have replaced aluminum electrolytic capacitors with film capacitors. The industrial chain of film capacitors continues to expand, and the demand for film capacitors continues to increase. What is the industry chain of film capacitors? Read this article to find out.

①The upstream of the film capacitor industry chain mainly includes base film, outer packaging, metal foil, etc. The base film shows performance differences according to different materials, so it is applied in different fields.

②The midstream is a supplier of various film capacitors, including polypropylene capacitors, polyethylene capacitors, etc.; film capacitors have the advantages of high voltage resistance, wide frequency response, and good temperature characteristics.

③Downstream applications are widely divided into traditional fields and new fields. Traditional fields include home appliances, lighting, industrial control, etc. Emerging fields include wind power photovoltaics, new energy vehicles, etc. In the long run, new energy vehicles will become the core driver of industry growth.

With the development of science and technology, there are more and more requirements for the use of film capacitors. In the future, film capacitors may tend to be developed with high frequency, large capacitance, high current, low impedance, and high voltage. If the performance of electronic devices is to be improved, the quality of the film capacitor must be guaranteed. Therefore, it is very important to choose a reliable film capacitor manufacturer.

JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com

 Understand the Principle of Thermistor in Electric Kettle

Thermistors can be used as electronic circuit components for temperature compensation of instrument circuits and temperature compensation of thermocouple cold junctions, etc. By using the self-heating characteristic of the NTC thermistor, the automatic gain control can be realized  and the protection circuit of the RC oscillator amplitude stabilization circuit can be created.

 

PTC thermistors are mainly used for overheat protection of electrical equipment, non-contact relays, constant temperature, automatic gain control, motor start, time delay, automatic degaussing of color TV, fire alarm and temperature compensation, etc. Do you know the principle of the thermistor kettle?

 

The principle of the electric kettle thermistor is actually very simple. It is to make the component reach a certain temperature through the current, and when the temperature exceeds the specified temperature, the resistance will be increased, thereby reducing the increase of the current or reducing the output of the current. In this way, the kettle can be protected from overflowing or drying out.

 

In addition to being used as a heating element, the thermistor can also function as a "switch", and is called a "thermal switch". After the current passes through the component, the temperature rises, that is, the temperature of the heating component rises. When the temperature exceeds the Curie point, the resistance increases, thereby limiting the current increase, so the decrease in the current causes the temperature of the component to drop, and the decrease in the resistance value makes the circuit current increase, the component temperature rises, and the cycle repeats.

 

Therefore, it has the function of keeping the temperature in a specific range, and also acts as a switch. As a heating element, it is used in heaters, electric soldering irons, drying cabinets, air conditioners, etc., and can also protect electrical appliances from overheating.

 

We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer.Our factories are ISO 9000 and ISO 14000 certified. If you have technical questions or need samples, please contact us: https://www.jeccapacitor.com/