Minggu, 24 April 2011

The types of capacitors

The types of capacitors
Multilayer Ceramic Capacitor

Raw material for the capacitor is equal to the type of ceramic capacitors, there is difference in the number of layers that make up the dielectric. In this type of dielectric is prepared with many layers or commonly referred to as the layer with thickness of 10 to 20 μm and the plate electrode is made of pure metal. In addition, small size and have a better temperature characteristic than ceramic capacitors. Usually this kind either used to pass high frequencies to the ground.

Polyester Film Capacitor

These capacitors have a higher tolerance value of the polyester film capacitor. In general, the capacitance of this component will not change if they are designed in a system where the frequency through which less than or equal to 100KHz. In addition to the picture shown polypropylene of capacitor tolerance ± 1%.

Polypropylene Capacitor

These capacitors have a higher tolerance value of the polyester film capacitor. In general, the capacitance of this component will not change if they are designed in a system where the frequency through which less than or equal to 100KHz. In the figure shown alongside polypropylene capacitors with a tolerance of ± 1%.

Mica Capacitors
This type uses mica as dielectric materials. Mica capacitors have a good degree of stability, because the low temperature coefficient. Because of its characteristic frequency is very good, usually capacitors are used for circuit resonance, filters for high frequency and high voltage circuit using for example: a radio transmitter that uses a tube transistor. Mica capacitors do not have a high capacitance value.

Polystyrene Film Capacitor
This type can not be used for applications that use high frequencies, because the same construction as the electrolytic capacitors such as coil. The capacitor is good for applications that use timer and filter frequency of several hundred KHz. This component has 2 colors for the electrodes, which are: red and gray - gray. For the red electrode is made of copper while the color - gray is made from aluminum foil.

Electric Double Capacitor (Super Capacitor)
This type of capacitor dielectric material similar to electrolytic capacitors. But the difference is greater than the size of capacitors electrolytic capacitors which have been described above. Usually has a unit of F. Image of the physical form can be seen on the side, the image has a size 0.47F capacitors. These capacitors are typically used for circuit power supply.

Trimmer capasitor

Capacitors of this type using a ceramic or plastic as the dielectric material. The value of the capacitor can be changed - change by turning screws located thereon. In the playback is expected to use a special screwdriver, so as not to cause the effect of capacitance between a screwdriver by hand.

Tuning Capacitor
These capacitors country of Japan referred to as "Varicons", usually used as a voter so many waves on the radio. Using air dielectric type. Capacitance value can be changed by rotating the handle located on the capacitor body to right or left.

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