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Ceramic Capacitors and Reliable Capacitors Manufacturer

On November 3, 2017, in Capacitor, by Lambert

The ceramic capacitor is available in many versions including leaded disc ceramic capacitors, surface mount multilayer ceramic capacitors, MLCCs etc.

 

Ceramic capacitors are one of the most widely used forms of capacitor used in electronics equipment these days.

 

Ceramic capacitors have also been used for many years, being found in valve or tube circuits dating from the 1930s.

 

Today ceramic capacitors area available in a variety of formats ranging from leaded components to surface mount technology, SMT varieties. As leaded versions disc ceramic capacitors are widely available, and as SMT devices, multilayer ceramic capacitors or MLCCs are available in all the common formats. As such these ceramic capacitors are used in virtually every type of electronics equipment.

 

The actual performance of the ceramic capacitors is highly dependent upon the dielectric used. Using modern dielectrics, very high values are available, but it is also necessary to check parameters such as the temperature coefficient and tolerance. Different levels of performance are often governed by the dielectric used, and therefore it is necessary to choose the type of dielectric in the ceramic capacitor.

 

Ceramic capacitors range in value from figures as low as a few Pico farads to around 0.1 microfarads. In view of the wide range and suitability for RF applications they are used for coupling and decoupling applications in particular. Here they are by far the most commonly used type being cheap and reliable and the loss factor is particularly low although this is dependent on the exact dielectric in use.

 

Basics of Ceramic Capacitor

Ceramic capacitors are the workhorses of the capacitor world these days. Ceramic capacitors are used in millions as a result of a combination of their cost and performance. There is a wide variety of dielectrics that can be used as described below, but as the name of the ceramic capacitor suggests, they are all ceramic in nature.

 

In order to ensure that sufficient levels of capacitance can be obtained within a single capacitor package, ceramic capacitors, like types of capacitor have multiple layers. This increases the level of capacitance to enable the required values of capacitance to be achieved.

 

Ceramic capacitors are available now in three main types although other styles are available:

 

  • Leaded disc ceramic capacitors for through hole mounting which are resin coated
  • Surface mount multilayer ceramic capacitors
  • Specialist microwave bare leadless disc ceramic capacitors that are designed to sit in a slot in the PCB and are soldered in place

 

Although it is possible to obtain other types of ceramic capacitor, these are the main types that can be found today. Of these the surface mount variety is used in the greatest quantities by far because of the manufacturing methods used these days for electronic equipment.

 

Capacitors Supplying Expert

Zonkas Electronic specializes in manufacture of Ceramic Capacitors which are applied to various industries. The ceramic capacitor is a capacitor constructed of alternating layers of metal and ceramic, with the ceramic material acting as the dielectric. The company has well-equipped manufacturing facilities that are operated by a team of experts. The strong team comprises of engineers, technicians, marketing professionals, quality analysts and customer services.

 

If you want to learn more information about ceramic capacitor manufacturer and capacitors, try to check out Zonkas’s website: www.zonkas-cap.com to obtain the details you need.

 

 

Article Source: http://www.radio-electronics.com/info/data/capacitor/ceramic-capacitor.php

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PTC Thermistors: Positive Temperature Coefficient

On September 5, 2017, in Capacitor, Electrode Products, by Lambert

The positive temperature coefficient, PTC thermistor has two types: silistor & switching PTC have very different characteristics.

 

As the name indicates a positive temperature coefficient, PTC thermistor has a response in which the resistance rises with increasing temperature.

 

There are two types of PTC thermistor which have very different characteristics, one showing a linear increase, whilst the other shows a sudden change in resistance.

 

PTC thermistor outline

 

PTC thermistors can be divided into two types according to their structure and the materials used. The two types of PTC thermistor have very different characteristics:

 

  • Switching PTC thermistor:

This form of PTC thermistor is used in heaters, sensors and specialized versions are also used as resettable fuses. Switching type NTC thermistors have a highly non-linear curve. The resistance at first falls slightly with increasing temperature, and then at a critical temperature the resistance increases dramatically, thereby acting virtually as a switch. This makes it ideal in many protection devices.

  • Silistor:

The silistor PTC thermistor uses a semiconductor as its base material and it is characterized by a linear characteristic and as a result, the silistor is used in temperature sensors. The silistor PTC thermistor is generally manufactured from doped silicon, the level of doping determining the exact characteristics.

 

Switching PTC thermistor basics

 

As the switching PTC thermistor is very widely used form, it warrants further explanation as it has an unusual characteristic.

 

Switching PTC thermistors are typically fabricated from polycrystalline materials including barium carbonate or titanium oxide with added materials including tantalum, silica, or manganese, etc.

 

The materials are mixed and ground to fine powders and finally compressed into the required shapes before being sintered. Contacts are then added and the thermistor is encapsulated.

 

The characteristic of the switching PTC thermistor shows that the device has a highly non-linear characteristic. As the temperature increases, the resistance first decreases, then rising slightly before it reaches a critical temperature, TC. At the critical temperature the resistance increases sharply for any increase in temperature, before finally leveling off and falling slightly.

 

A similar type of device is known as a Polymer PTC. These devices consist of a plastic element into which carbon grains are embedded. When cool, the carbon is able to conduct electricity, but as the temperature increase the carbon grains move further away as a result of expansion and conduction falls rapidly. In this way the device acts like a switch in the same way as the more traditional PTC thermistors.

 

PTC thermistor operational modes

 

There are two main ways in which switching PTC thermistors are generally used.

 

  • Self-heating mode:

When used in the self-heating mode, current is passed through the thermistor, often in series with the item being controlled. As it heats up as a result of the current, it reaches a point where the critical temperature is reached and the resistance increases significantly. In this way it operates in a self-heating mode and can be used as a safety cut-out or regulator.

 

  • Sensor mode:

In this mode, a minimum amount of current is passed through the device and PTC thermistor senses the surrounding temperature. Keeping the current to a minimum ensures the self-heating effect is negligible and only the surrounding temperature affects the device. As the surroundings heat the device it may reach its critical temperature at which point the resistance will significantly increase.

 

Switching PTC thermistor applications

 

Switching thermistors are a very useful form of electronic component. It can perform functions with a single component that would require far more complex circuitry should any other technique be used.

 

  • In-rush protection:

Some electrical items like motors and transformers have a large surge of current at switch on. This gives rise to very high peaks of current which can cause spikes on the power line, or cause damage in some instances. PTC thermistors can be used to reduce the level of the inrush current and thereby prevent the spikes or damage occurring.

 

  • Overcurrent protection:

In this application, the PTC thermistor is placed in series with the load and uses the self-heating effect. The current taken under normal conditions should enable the thermistor to operate in its flat resistance curve area. However if an over-current condition arises, then the thermistor will carry more current and the temperature will rise more causing it to rise beyond the critical temperature when the resistance will rise significantly causing the current to drop.

 

PTC thermistor circuit symbol

 

It is sometimes necessary to indicate the type of thermistor being used on a circuit diagram. Accordingly the IEC have a special PTC thermistor circuit symbol that can be used.

 

As seen the circuit symbol utilizes the characters +t° to give an indication of the positive temperature coefficient.

 

Positive temperature coefficient, PTC thermistors are used in many electronic circuits and for a variety of functions. It is essential to check that the correct type is selected for any given circuit to ensure that its characteristic meets the requirements.

 

Zonkas is the experienced and reliable manufacturer of specializing in capacitor, inductor, and transformer. If you are still interested in PTC thermistors, welcome to visit the website of Zonkas.

 

 

Article Source: https://www.electronics-notes.com/articles/electronic_components/resistors/thermistor-ptc-positive-temperature-coefficient.php

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Choosing the Best Option for Overcurrent Circuit Protection

On April 25, 2017, in Capacitor, Electrode Products, by Lambert

When it comes to overcurrent protection of electronic equipment, fuses have long been the standard solution. They come in a wide variety of ratings and mounting styles to fit virtually any application. When they open, they completely stop the flow of electricity, which may be the desired reaction; the equipment or circuit is rendered inoperable, which draws the user’s attention to what may have caused the overload condition so that corrective action can be taken.

 

Nevertheless, there are circumstances and circuits where auto-recovery from a temporary overload without user intervention is desirable. Positive temperature coefficient (PTC) thermistors – also called polymeric positive temperature coefficient devices (PPTCs) or resettable fuses – are an excellent way of achieving this type of protection.

 

Ceramic PTCs are also widely available through possess different operating characteristics including greater internal resistance, higher ambient heat tolerance, and higher voltage ratings. As they are typically used within high ambient heat areas including heating equipment applications not common to many electronics requirements, they were not factored within the scope of this article.

 

How a PTC works

 

A PTC resettable fuse consists of a piece of polymer material loaded with conductive particles (usually carbon black). At room temperature the polymer is in a semi-crystalline state and the conductive particles touch each other, forming multiple conductive paths and providing low resistance (generally about twice that of a fuse of the same rating).

 

When current passes through the PTC it dissipates power (P = I2R) and its temperature increases. As long as the current is less than its rated Hold Current, IHOLD, the PTC resettable fuse will remain in a low-resistance state and the circuit will operate normally. When the current exceeds the rated Trip Current, ITRIP, the PTC heats up suddenly. The polymer changes to an amorphous state and expands, breaking the connections between the conductive particles. This causes the resistance to increase rapidly by several orders of magnitude and reduces the current to a low (leakage) value just sufficient to keep the PTC in the high-resistance state – generally from around tens of milliamps to several hundred milliamps at rated voltage (Vmax). When the power is shut off the device cools down and returns to its low-resistance state.

 

Like a fuse, a PTC is rated for the maximum short circuit current (IMAX) it can interrupt at rated voltage. IMAX for a typical PTC is 40A, and may reach 100A. Interrupting ratings for fuses of the sizes that may be used in the sorts of applications we are considering here can range from 35 to 10000 amperes at rated voltage.

 

The voltage rating for a PTC is limited. PTC resettable fuses for general use are not rated above 60V operating voltage (there are PTCs for telecom application with 250V and 600V interrupting voltage, but their operating voltage is still 60V); surface-mount and small cartridge fuses are available with ratings from 32V to 250V or more.

 

The operating current rating for PTCs ranges up to about 9A, while the maximum level for fuses of the types considered here can exceed 20A, with some available to 60A.

 

The useful upper temperature limit for a PTC is generally 85°C, while the maximum operating temperature for thin-film surface mount fuses is 90°C, and for small cartridge fuses is 125°C. Both PTCs and fuses require derating for temperatures above 20°C, although PTCs are more sensitive to temperature (Fig.2). When designing in any overcurrent protective device, be sure to consider factors that may affect its operating temperature, including the effect on heat removal of leads/traces, any air flow, and proximity to heat sources. The speed of response for a PTC is similar to that of a time delay fuse.

 

Common PTC applications

 

Much of the design work for personal computers and peripheral devices is strongly influenced by the Microsoft and Intel System Design Guide which states that “Using a fuse that must be replaced each time an overcurrent condition occurs is unacceptable.” And the SCSI (Small Computer Systems Interface) Standard for this large market includes a statement that “… a positive temperature coefficient device must be used instead of a fuse, to limit the maximum amount of current sourced.”

 

PTC resettable fuses are used to provide secondary overcurrent protection for telephone central office equipment and customer premises equipment, alarm systems, set top boxes, voice over IP (VOIP) equipment and subscriber line interface circuits (SLICs). They provide primary protection for battery packs, battery chargers, automotive door locks, USB ports, loudspeakers and power over Ethernet.

 

SCSI Plug and Play applications that benefit from PTCs include both the mother-board and the many peripherals that can be frequently connected to and disconnected from the computer ports. The mouse, keyboard, printer, modem and monitor ports represent opportunities for misconnections and connections of faulty units or damaged cable. The ability to reset after correction of the fault is particularly attractive.

 

A PTC resettable fuse can protect disk drives from the potentially damaging overcurrent resulting from excessive current from a power supply malfunction.

 

PTC resettable fuses can protect power supplies against overloading; individual PTCs can be placed in the output circuits to protect each load where there are multiple loads or circuits.

 

Motor overcurrent can produce excessive heat that may damage the winding insulation and for small motors may even cause a failure of the very small diameter wire windings. The PTC will generally not trip under normal motor start up currents, but will act to prevent a sustained overload from causing damage.

 

Transformers can be damaged by overcurrent caused by circuit faults, and the current limiting function of a PTC can provide protection. The PTC is located on the load side of the transformer.

 

Fuse or PTC?

 

The following procedure will help in selecting and applying the correct component. Help is also available from device suppliers. For unbiased advice it is wise to look for a company that offers both fuse and PTC technology.

 

  1. Define the circuit operating parameters. Consider the following: normal operating; current in ampere; normal operating voltage in volts; maximum interrupt current; ambient temperature/rerating; typical overload current; required opening time at specific overload; transient pulses expected; resettable or one-time; agency approvals; mounting type/form factor; typical resistance (in circuit).

 

  1. Select a prospective circuit protection component.

 

  1. Determine the opening time at fault. Consult the Time-Current (T-C) Curve to determine if the selected part will operate within the constraints of the application.

 

  1. Verify ambient operating parameters. Ensure that the application voltage is less than or equal to the device’s rated voltage and that the operating temperature limits are within those specified by the device

 

  1. Verify the device’s dimensions. Compare the maximum dimensions of the device to the space available in the application.

 

  1. Test the selected product. Independently test and evaluate suitability and performance in the actual application.

 

Zonkas is the professional manufacturer of capacitor, inductor and transformer. Our main products including: various inductors, transformers, Safety Capacitor (Y1, Y2, X1, X2), Ceramic Capacitor, Film Capacitor and Electrolytic Capacitor. If you need more information about PTC resettable fuses or other capacitors, welcome to visit our website or contact with Zonkas directly!

 

 

Article Source: http://www.engineerlive.com/content/21341

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Introduction to the Different Types of Electrical Capacitor

On April 14, 2017, in Capacitor, by Lambert

An electrical capacitor is a type of electrical reservoir that stores and releases electric energy. This type of item is used in the production of many devices, such as amplifiers, computers, televisions, radios etc. You can find some of the components mentioned above in almost all electronic circuits.

 

Since they basically host an electric charge, their voltage and capacities can apply to a large variety of needs. Producers use a lot of materials to create capacitors according to the area of usage.

 

Ceramic

 

Usually, electrical capacitors are designed as sandwiches of insulators placed between 2 layers of metal. An insulator is made out of a material called “dielectric” and it determines the general behavior of the capacitor. The devices that have a ceramic dielectric have smaller values (they start at a couple of picofarads- the farad is the unit of capacitance) and can reach even a thousand picofarads. An interesting thing about them is that they have great capacitance stability when it comes to a large temperature range.

 

Tantalum

 

The items that need to fit a large capacitance value in a tiny space can easily use tantalum capacitors. They are polarized (one lead takes positive charges while the other one negative ones). Extra attention should be given in order not to wire the capacitor backwards or the polarity might destroy it. You can recognize a bad capacitor by the silvery fluid released.

 

Aluminum Electrolytic

 

This is used for the stronger applications and the power-supply filters. It is not very expensive and has a tolerance of 20%. This means that they normal value of the part can vary higher or lower than the value displayed on the label.

 

One of the most significant issues in this case is represented by the liquid inside, which can dry and prevent the capacitor from working. The liquid can also leak and destroy the rest of the components. Furthermore, the electrolytic capacitors can explode if they are connected in a wrong manner, they can leak current, do not have a long lifespan and do not resist to high temperatures.

 

Polyester Film

 

This type of electrical capacitors has a greater capacitance value and it is very reliable. Its capacitance increases when the temperature does, making it incompatible with sensitive circuits. These capacitors can be found in various locations and do not cost very much.

 

Silver Mica

 

This is also a great dielectric. Mica is a natural mineral which creates thin sheets. It has a very accurate part values, it is very reliable, but its price is a bit higher compared to other capacitors. It is used especially for the frequency-sensitive parts of the radio and audio circuits. In this case, the capacitance value starts at a couple of picofarads and goes up to very low microfarads.

 

Are you looking for a reliable provider of electrical capacitors? Yuhchang Electric Co., Ltd. would be the first choice of capacitor supplier for you.  With rich experienced and advanced technology, we insist to produce high quality electrical capacitor series to clients. Welcome to visit Yuhchang’s website to learn more information about our products. Feel free to contact with us for further details!

 

 

Article Source: http://EzineArticles.com/7959118

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Overview of Power Capacitors

On October 4, 2016, in Capacitor, by Lambert

What are they?

 

Power capacitors work by acting as a reserve power bank; they store the charge rather than being the source of power such as the battery. When you are listening to your music, and playing a heavy sub-bass note, the power will draw from the capacitor rather than from the battery so to ensure that the rest of the car will not be starved of power i.e. the headlights dimming. It will act as a buffer so that that the power being delivered to the amplifiers will not drop below the recommended voltages and be steady therefore reducing the risk of damage to the components.

 

So what power capacitor to choose?

 

After doing a bit of research, the general rule seems to be 1 farad per 1000 watts of power that your system is running at. So using that, a 1.5 farad power capacitor should be ideally suited to a 1500 watt system. There is a large selection of power capacitors available out there, for example, this power capacitor is a 2 farad power capacitor designed for smaller systems, this is not to say however that it will have a reduction in performance, however for those systems that require more power, a power capacitor with a higher farad will be able to deliver for longer and will usually be of a higher build quality.

 

How to install the capacitor

 

Ideally the capacitor needs to be installed as close to the amplifiers as possible. The capacitor requires a 12 volt positive from the battery and a separate ground, to the amplifier; so that the 12 volt positive is ‘inline’ with the terminal from the battery and the amplifier. The amplifier 12 volt positive is then taken from the capacitor while the amplifier is usually grounded separately as it is important to use as short a ground cable as possible to reduce any potential ground interference.

 

When you need to consider other alternatives

 

Power capacitors will not always be of help when you are listening to music, if the lights for example dim down, and stay dim, this indicates there is a deficiency of power and there are other methods of solving the problem, it could potentially be that the battery is not able to generate a charge sufficient enough to meet the demands, so installing a higher cranking battery is usually the common solution however it is possible that upgrading “The Big Three” may also solve the issue(see below for more details). It is also important to check that the current alternator can produce a charge that will be sufficient with a larger battery.

 

‘The Big Three’

 

The big three is a popular upgrade. It consists of upgrading three wires in the car to ones that are much thicker. As a result of using much thicker wire, more current is allowed to flow through; hence the overall effect seen will be that the voltage running through the car will be higher. The three wires that are upgraded are the wire from the alternator to the battery, the engine ground to the chassis and the battery ground to the chassis. It is common, but not always, that people will choose 0 gauge power wire when going about the big three upgrade. This is vital again to ensure that the voltage delivered to the amplifiers does not drop so low that the risk of damage is possible.

 

Conclusion

 

So in conclusion, there is no hard or fast answer to if a capacitor is necessary or not. However capacitors may have benefits if used appropriately. There are large selections of capacitors; some come with digital volt meters, distribution blocks etc., while others are purely chosen for aesthetic pleasure, I myself went for a 4 farad power capacitor with a built in digital volt meter with an LCD display so that it was something I was able to display and looks pretty damn cool.

 

If you need more details about power capacitors and capacitor supplier, welcome to visit our website and feel free to send inquiries to YUHCHANG – the outstanding and professional power capacitor manufacturer in Taiwan.

 

 

Article Source: http://EzineArticles.com/expert/Neil_Patel/563675

 

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Ceramic Disc Capacitor – How to Accurately Test It

On August 23, 2016, in Capacitor, by Lambert

In this article I will talk about the high voltage resin coated ceramic disc capacitor. In computer monitor, it is frequent used in the screen voltage (G2) line at the CRT board. When it fails, it can cause erratic or intermittently raster bright and dim and sometimes no display.

 

Adjusting the flyback transformer screen control will not solve this problem. You can isolate the problem as whether if it cause by a defective fly back or G2 line at CRT board. Remove the G2 wire from circuit and measure the screen voltage with a digital multimeter- it should have a constant voltage (will not vary). If the voltage is not stable suspect the fly back. If it OK then trace the screen voltage circuit. Usually this circuit consists of only resistors and capacitors. Sometimes a defective CRT socket might cause this type of problem also!

 

Many times a tech can’t solve this intermittent or no display problem is because their digital capacitance and ohmmeter measured OK on the capacitors. The capacitors in the screen voltage line are usually rated of 102,103, and 472 1kv to 2kv. A ‘missed’ in checking these capacitors will cause the technician can’t solve the problem, unless he direct replaces the capacitor. An intermittent capacitor can pull down the screen voltage causing the display problem.

 

As mentioned earlier, an ohmmeter with 12v output and a digital capacitance with 3v output are unable to accurately check the capacitor that have the rating of 1-2 kilovolt!

 

If you have the analog insulation tester or meter, the panel will show a short circuit when certain voltage are pump in to check the high voltage capacitor. The voltages that you can select is depends on the brand or model you buy. Some have the range of 50v to 1000v and some have the range from 100v to 500v. It is optional whether you should have one. If you have one then it would be an added advantage for you. The other option that you have is to direct replace the suspected capacitor. In my country, you can get a new one in less than US150.00 or you may bid a used unit from eBay.

 

As for me, checking the small blue resin coated ceramic disc capacitor that have the capacitor code of 104 50v, besides using digital capacitance meter to check for the value, i also use an analog meter set to times 10Kohm that have the output of 12v to check this type of capacitor. Many times it will reveal the bad intermittent capacitor. You will be shocked to see the capacitance meter checked OK but show a shorted reading when check with analog multimeter.

 

In the market there is certain brand of analog multimeter that has the range of 100kohm. If you open up the cover, you can’t see the 9v battery in it, what you see only the 2 pieces of 1.5v battery. This type of meter can’t accurately detect the short in the capacitor because the output voltage is only 3volt!

 

For those of you who involved in repairing monitor, you will agree with me that checking the flyback internal capacitance- quite often you get the right value 2.7nf with digital capacitance meter but when you switch on the monitor, you will hear a ‘tick-tick’ sound from the flyback. This is because the capacitor is breaking down when under load. If you did not do anything with the flyback, gradually the internal capacitance will become shorted and you will need to refurbish the flyback.

 

Zonkas Electronic specializes in manufacture of Ceramic Capacitors which are applied to various industries. The ceramic capacitor is a capacitor constructed of alternating layers of metal and ceramic, with the ceramic material acting as the dielectric. The company has well-equipped manufacturing facilities that are operated by a team of experts. The strong team comprises of engineers, technicians, marketing professionals, quality analysts and customer services. If you need more details about ceramic capacitors, welcome to visit our website and feel free to send inquiries to Zonkas.

 

Head Office (Zonkas Electronic Co., Ltd)

No.13, Ln. 65, Fuya Rd., Xitun Dist., Taichung City 40764, Taiwan

TEL: 886-4-24613820

FAX: 886-4-24612387

E-mail: zonkas@ms18.hinet.net

 

 

Article Source: http://EzineArticles.com/54772

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An Introduction to Capacitors and Types of Capacitors

On November 5, 2015, in Capacitor, by Lambert

A capacitor is a device used in the field of electronics that is capable of storing energy and sustaining one electric field. It consists of a pair of surfaces that are conductive, usually in the form of sheets or plates, in a position to influence the total (i.e. the electric field of all the field lines that start from one electric device and connect to another) field separated by a medium that is dielectric or vacuum. These plates, subjected to a potential difference, acquire a given electric charge, one positive and the other negative, with the total charge of zero variation.

Although from the physical point of view a capacitor stores no charge or power, but simply mechanical energy that is latent; when introduced into a circuit it behaves in practice as an element that is able to store the electrical energy it receives during the charging period, the same energy yield during the period after discharge. Due to this particular characteristic, capacitors are widely used in the field of electronics to boost the capacity of electrical devices. There are a wide variety of capacitors available in the market and they are used for commercial as well as domestic purposes.

The different types of capacitors are as follows:

Variable capacitor – These capacitors typically consist of a dielectric parallel plate and encapsulated in glass. As their electric permittivity is unity, they have a very small capacity. They are used in radio and aviation radars because of which they are regarded as very important in the field of aviation.

Mica capacitors – The mica capacitors have several properties that make them suitable for things that require a dielectric capacitor. They suffer low losses, can be wrapped in thin sheets, withstands high temperatures and are not degraded by oxidation or moisture. Aluminum is deposited on one side of the mica capacitors, forming an armature. Several of these sheets are stacked alternately by welding the ends to each of the terminals. These capacitors work well at high frequencies and high voltages, but are expensive and are gradually being replaced by other types.

Paper capacitors – These capacitors consist of waxed paper dielectric, and are subjected to any other treatment that reduces their hygroscopic and increases isolation. They are made of two strips of paper that help to prevent the pores that may arise. They are very useful in devices that require handling high voltage electricity. The paper capacitors have applications in industrial environments.

Metalized film capacitors – They are also known as self-healing capacitors. When they are faced with an overload that exceeds the dielectric strength of the capacitor, the paper tears at some point, causing a short circuit between the plates, but this short causes high current density in the torn area. This current melts the thin aluminum layer surrounding the circuit, restoring the insulation between the plates.

Electrolytic capacitors – It is a type of capacitor that uses an electrolyte, which acts as a cathode. With proper tension, the electrolyte deposits an insulating layer (which is generally a very thin layer of aluminum oxide) on the second armature or anode, thus achieving very high capacities. They cannot be operated with AC power.

Varying dielectric capacitor – These types of capacitors have a movable armature which rotates about an axis. The profile of the armature is normally such that the capacitance change is proportional to the logarithm of the rotating angle. They are used in different industrial devices that require a lot of electricity.

Please visit newsmartcom.com, if you are looking for a capacitor for sale.

Article Source: http://EzineArticles.com/expert/Rajot_Chakraborty/1170702

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Inductors and Coils Manufacturer – Zonkas Electronic

On May 14, 2015, in Capacitor, by Lambert

Taiwan Inductor and Capacitor Manufacturer & Supplier

Established in 1982, Taiwan Zonkas is a professional capacitor manufacturer. It manufactures ceramic capacitor, film capacitors, electrolytic capacitor, multilayer ceramic capacitors, mini box capacitor and more. Now, Zonkas Electronic have specialized workshops for manufacturing inductors and transformers. Except inductors and capacitos, Zonkas also provide total solution service for other components.

Equipped with specialized production and inspection equipment, Zonkas also strictly carry out the ISO9001 standard. Now Zonkas have obtained UL, VDE, ENEC, NEMKO, CQC, EK certifications.
And Zonkas’s products, inductors and capacitors sell well in such
countries and regions as Europe, North America and South America.

Zonkas Electronic Co., Ltd.
http://www.zonkas-cap.com/
No.13, Ln. 65, Fuya Rd., Xitun Dist., Taichung City 40764, Taiwan
TEL:886-4-24613820
FAX:886-4-24612387

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