Capacitors Blog

Suntan Technology Company Limited
---All Kinds of Capacitors

Also referred to as a condenser, a capacitor is a passive electrical component widely used to store electricity as an electrical charge. 
There are many types of capacitors available on the market. You can find very small ones available as capacitor beads utilized in resonance circuits. 
Large power factor correction capacitors are also available from very small to huge capacitors and everything in between, you would find a wide range of capacitors. However, they all serve one function and that is to store electrical charge.
 
The simplest type of capacitor available consists of 2 parallel conductive plates. These plates are separated via dielectric, an insulating material. 
This insulating layer interrupts the flow of DC current via the capacitor. Instead of DC current, a voltage across the plates is present in the form of an electrical charge.
Conductive plates are available in various shapes such as circular, cylindrical and rectangular. The insulating layer is either in the form of waxed paper, Air, Plastic or even in certain type of liquid gel. 
 
Electrical charge can be of two types namely positive and negative. Positive charge is present in the form of protons and negative charge in the form of electrons. The positive charge collects on a plate as soon as a voltage is placed across a capacitor. This is followed by a corresponding negative charge accumulation on the other plate. For each particle of positive charge a mining at one plate, a charge from similar will depart from- ve plate. The plates charge neutral. This is a potential different obtained from charge existing between two plates. The amount of charge that was deposited on the plates and the amount of capacitance the capacitor posses.
Capacitance is defined as the electrical property of a capacitor. It is the measure of the ability of capacitors for storing an electrical charge on two plates. In case, a voltage of (V) volts is connected across 2 plates capacitors, a positive electrical charge (2) will be present on one plate in coulombs and a negative charge on the other.This indicates that the capacitor will possess a capacitance valve equivalent to the amount of charge divided by voltage running across. This will proved the capacitance equation of (C=QV).

A good capacitor will have high dielectric resistance as well as zero plate resistance. This results in the charge flowing across the plates remaining constant for an indefinite period of time as soon as the source voltage was removed.

Suntan is a professinal in this capacitor lines. Suntan technical department are ready here to provide further supports and sales are waiting for new inquiry.
Old customers welcome to check offers with Suntan sales, and new customers, please click info@capacitors.com.hk to check prices and stocks !

For more details please check : http://www.capacitors.hk/
Thank you for your attention!

Suntan Technology Company Limited
---All Kinds of Capacitors

Suntan aluminum Electrolytic capacitors store charge in a chemical paste called an electrolyte. They have large capacitance values, and are inexpensive and durable. Electronic designers typically use electrolytic capacitors to remove electrical noise from circuits. Since these capacitors are polarized, you must pay attention to the positive and negative leads or risk an explosion. When you use electrolytic aluminum capacitor, note that it has its capacitance and voltage values clearly printed on the body of the part. 

Electrolytic capacitors have capacitance ratings in the range of 10 to 200,000 microfarads. The voltage rating is the maximum voltage to which the capacitor should be subject. Maximum voltages for electrolytic generally range from 20 to 600 volts.

Suntan manufacture a wide range of Aluminum Electrolytic Capacitors, Including Snap-in type Electrolytic Capacitor, Screw type and LUG type Aluminum Electrolytic Capacitor, Axial & Radial Electrolytic Capacitor and SMD Aluminum Electrolytic Capacitor etc.

For more details, you can check on our website: http://www.capacitors.hk

Suntan Technology Company Limited
----All Kinds of Capacitors

There is one other common packaging for integrated circuits and this is the PGA or Pin Grid Array. The BGA looks physically similar to a Pin Grid Array package. Both are one-sided; that is, only one face of the semi-conducting substrate is used for printing and mounting of circuit components. Moreover, both have an obvious grid-like pattern. However, the Pin Grid Array uses pins - thus, the name - whereas the BGA uses balls - as it has already been mentioned above. The pins (in the PGA) or the balls (in the BGA) are the materials through which electricity is conducted between the printed surface of the semiconductor board and the surface-mounted circuit components.http://www.capacitors.hk/

Suntan Technology Company Limited
----All Kinds of Capacitors

On capacitors that are large enough (e.g. electrolytic capacitors) the capacity and working voltage are printed on the body without encoding. Sometimes the markings also include the maximum working temperature, manufacturer's name and other information.

Smaller capacitors use a shorthand notation, to display all the relevant information in the limited space. The most commonly used format is: XYZ J/K/M VOLTS V, where XYZ represents the capacitance (calculated as XY×10Z pF), the letters J, K or M indicate the tolerance (±5%, ±10% and ±20% respectively) and VOLTS V represents the working voltage.

Polarised capacitors, for which one electrode must always be positive relative to the other, have clear polarity markings, usually a stripe or a "-" sign on the side of the negative electrode. Also, the negative lead is usually shorter.

Suntan Technology Company Limited
----All Kinds of Capacitors 

When clouds drift through the sky, ice particles inside them rub against the air and gain static electrical charges—in just the same way that a balloon gets charged up when you rub it on your jumper. The top of a cloud becomes positively charged when smaller ice particles swirl upward (1); the bottom of a cloud becomes negatively charged when the heavier ice particles gather lower down (2). The separation of positive and negative charges in a cloud makes a kind of moving capacitor!

As a cloud floats along, the electric charge it contains affects things on the ground beneath it. The huge negative charge at the bottom of the cloud repels negative charge away from it, so the ground effectively becomes positively charged (3). The separation of charge between the bottom of the cloud and the ground beneath means that this area of the atmosphere is also, effectively, a capacitor.

Over time, enormous electrical charges can build up inside clouds. If the charge is really big, the cloud contains an enormous amount of electrical potential energy (it has a really high voltage). When the voltage reaches a certain level (sometimes several hundred million volts), the air is transformed from being an insulator into a conductor, and electricity will flow through it as though it were a metal wire, creating a giant spark better known as a bolt of lightning (4). The cloud behaves like a flash gun in a camera: the huge electrical energy stored in its "capacitor" is discharged in an instant and converted into a flash of light.

Suntan Technology Company Limited
----All Kinds of Capacitors

Suntan pictures of Capacitors. Notice that all these capacitors have two wires coming out of them, one attached to each plate.

Suntan is well established and specializes in service and quality with an extensive export and import network. We provide quick turn around for our customers all over the world. Almost 30 years experience with all types of passive components using good materials, state of the art equipment and technology and ongoing QC coupled with extensive R & D assure our customers of the best quality and on time delivery.

Suntan offer many kinds of capacitors. Don’t hesitate to send us inquire to sales@suntan.com.hk .We will show you good quality and best price.

Basic Information:

Atomic Number: 13 
Atomic Mass: 26.981539 amu 
Melting Point: 660.37℃ (933.52 K, 1220.666 °F) 
Boiling Point: 2467.0℃ (2740.15 K, 4472.6 °F) 
Number of Protons/Electrons: 13 
Number of Neutrons: 14 
Classification: Other Metals 
Crystal Structure: Cubic 
Density @ 293 K: 2.702 g/cm3 
Color: Silver 
British Spelling: Aluminium 
IUPAC Spelling: Aluminium

Atomic Structure:

Number of Energy Levels: 3
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 3

Isotopes:

Facts:

Date of Discovery: 1825
Discoverer: Hans Christian Oersted
Name Origin: From the Latin word alumen
Uses: airplanes, soda cans
Obtained From: bauxite

Suntan Technology Company Limited
---All Kinds of Capacitors

Aluminum electrolytic capacitors are comprised of anode and cathode plates separated by an absorbent spacer. As shown in Figure below, metal tabs are attached to the anode and cathode plates, and the assembly is wound into a cylindrical section. The tabs are welded to aluminum terminals installed in a header (top). The section-header assembly is immersed in a bath of hot capacitor electrolyte (significantly different from the formation process electrolyte). In what is called the impregnation process, a vacuum is applied to the electrolyte and sections, causing electrolyte to be drawn into the sections, thoroughly wetting the sections. The sections are placed in aluminum cans, and the headers are sealed to the cans. The capacitor units are slowly brought up to maximum rated voltage at maximum rated temperature during the aging process. The aging process grows oxide on areas on the anode foil which have an insufficient oxide barrier, such as slit edges and places which have been cracked during the winding operation. Inspections and tests occur at several stages of the production process.

For more details please check : http://www.capacitors.hk/Aluminum-Electrolytic-Capacitors/

Suntan Technology Company Limited
---All kinds of Capacitors

Aluminum is used for the electrodes by using a thin oxidization membrane.

Large values of capacitance can be obtained in comparison with the size of the capacitor, because the dielectric used is very thin.

The most important characteristic of electrolytic capacitors is that they have polarity. They have a positive and a negative electrode.[Polarised] This means that it is very important which way round they are connected. If the capacitor is subjected to voltage exceeding its working voltage, or if it is connected with incorrect polarity, it may burst. It is extremely dangerous, because it can quite literally explode. Make absolutely no mistakes.

Generally, in the circuit diagram, the positive side is indicated by a "+" (plus) symbol.

Electrolytic capacitors range in value from about 1µF to thousands of µF. Mainly this type of capacitor is used as a ripple filter in a power supply circuit, or as a filter to bypass low frequency signals, etc. Because this type of capacitor is comparatively similar to the nature of a coil in construction, it isn't possible to use for high-frequency circuits. (It is said that the frequency characteristic is bad.)

The photograph on the left is an example of the different values of electrolytic capacitors in which the capacitance and voltage differ.

From the left to right:

• 1µF (50V) [diameter 5 mm, high 12 mm]
• 47µF (16V) [diameter 6 mm, high 5 mm]
• 100µF (25V) [diameter 5 mm, high 11 mm]
• 220µF (25V) [diameter 8 mm, high 12 mm]
• 1000µF (50V) [diameter 18 mm, high 40 mm]

The size of the capacitor sometimes depends on the manufacturer. So the sizes shown here on this page are just examples.

In the photograph to the right, the mark indicating the negative lead of the component can be seen. You need to pay attention to the polarity indication so as not to make a mistake when you assemble the circuit.