Capacitors Blog

Suntan Technology Company Limited
---All kinds of Capacitors

Tantalum bead capacitors are polarised and have low voltage ratings like electrolytic capacitors. They are expensive but very small, so they are used where a large capacitance is needed in a small size.

Modern tantalum bead capacitors are printed with their capacitance, voltage and polarity in full. However older ones use a colour-code system which has two stripes (for the two digits) and a spot of colour for the number of zeros to give the value in µF. The standard colour code is used, but for the spot, grey is used to mean × 0.01 and white means × 0.1 so that values of less than 10µF can be shown. A third colour stripe near the leads shows the voltage (yellow 6.3V, black 10V, green 16V, blue 20V, grey 25V, white 30V, pink 35V). The positive (+) lead is to the right when the spot is facing you: 'when the spot is in sight, the positive is to the right'. 

• For example:   blue, grey, black spot   means 68µF
• For example:   blue, grey, white spot   means 6.8µF
• For example:   blue, grey, grey spot   means 0.68µF

Suntan Technology Company Limited
---All kinds of Capacitors

A capacitor is a passive electronic component that storesenergy in theform of an electrostatic field. In its simplest form, a capacitorconsists of twoconducting plates separated by an insulating material called thedielectric. Thecapacitance is directly proportional to the surface areas of the plates, andis inverselyproportional to the separation between the plates. Capacitance alsodepends on thedielectric constant of the substance separating the plates.

The standard unit of capacitance is the farad, abbreviatedF. Thisis a large unit; more common units are the microfarad, abbreviated µF (1 µF =10-6F) and the picofarad, abbreviated pF (1 pF = 10-12 F).

Capacitors can be fabricated onto integrated circuit (IC)chips. They are commonly used in conjunction with transistors in dynamic random access memory (DRAM). The capacitors helpmaintain thecontents of memory. Because of their tiny physical size, thesecomponents have lowcapacitance. They must be recharged thousands of times per second or theDRAM willlose its data.

Large capacitors are used in the power supplies of electronicequipment ofall types, including computers and their peripherals. In these systems,thecapacitors smooth out the rectified utility AC, providing pure, battery-likeDC.

Trimming Potentiometers is used by more and more products, its application including satellite receivers, modems, LCD displays, set-top boxes, and meters and instruments, as well as entertainment devices, such as cameras, and MP3 players...

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Suntan can offer all kinds of Trimming Potentiometers, as below:

• TSR-3006 - Rectangular Trimming Potentiometers
• TSR-3323 - 7 Terminal Square Trimming Potentiometers
• TSR-3296 - 5 Terminal Square Trimming Potentiometers
• TSR-3362 - 9 Terminal Square Trimming Potentiometers
• TSR-3386 - 8 Terminal Square Trimming Potentiometers
• TSR-3329 - Circularity Trimming Potentiometers
• TSR-3266 - 5 Terminal Square Trimming Potentiometers
• TSR-3318 - 6mm Phenolic Round Trimming Potentiometers
• TSR-3306 - 6mm Cermet Round Trimming Potentiometers
• TSR-3309 - 9mm Round Trimming Potentiometers
• TSR-065 - Phenolic Trimming Potentiometers
• TSR-3590 - Precision Multiturn Wirewoud Potentiometer
• TSR-105H - 6 Terminal Trimming Potentiometers