About Tantalum Capacitor

November 12, 2010 Views
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The tantalum capacitor is a highly reliable type of solid capacitor or electrolytic capacitor. Surface mount tantalum capacitors are increasingly being used in circuit designs because of their volumetric efficiency, basic reliability and process compatibility.

Tantalum capacitors are manufactured from a powder of relatively pure tantalum metal. The typical particle size is between 2 and 10 μm. Surface area is expressed in capacitance (C) in microfarads (µF) times voltage (V) in volts (V) per gram of powder (CV/g) Note the very great difference in particle size between the powders.

Dipped Tantalum Capacitor

Our Suntan Technology Company has many types of tantalum capacitors ,such as Dipped Tantalum Capacitor-TS19,Please see the detailed information on our website www.suntan.com.hk for your reference ,and welcome your enquiry about our all kinds of capacitors.

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Capacitor and trimming potentiometer make Suntan Technology high revenue

June 14, 2010 Views
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SMD Trimmer Potentiometer

July 13, 2009 Views
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SMD Trimmer Potentiometer Features

  1. Single-Turn/ Cermet/ Open Frame
  2. Recommended for reflow processing
  3. Rotor design compatible with automatic adjustment equipment
  4. Supplied in 8mm embossed tape, compatible with automatic Assembly equipment
  5. 3mm size m eets EIA/EIAJ standard trimmer footprint

SMD Trimmer Potentiometer Electrical Characteristics

  1. Standard Resistance Range 10Ω to 1MΩ
  2. Resistance Tolerance ±25%
  3. Adjustment Angle 220°C ± 20°C
  4. Residual Resistance =<1K, 20Ω>1K, 2%)

SMD Trimmer Potentiometer Pictures

SMD Trimmer Potentiometer

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Phenolic Trimming Potentiometers

May 20, 2009 Views
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Phenolic Trimming Potentiometers Features

  1. (Single Turn/ Phenolic/ Industrial)
  2. (4 Terminal S tyles)

Phenolic Trimming Potentiometers Electrical Characteristics

  1. Standard Resistance Range 100Ω - 2MΩ
  2. Resistance Tolerance ±10%, ±20%, ±30%
  3. Residual Resistance Max 5% of Nominnal Resistance, But under 30Ω
  4. Pesistance Taper Linear (B)
  5. Rated Power 0.1W
  6. Operating Voltage 50V Max
  7. Potational Life Max ±5% change in resistance after 100 unloaded rotations
  8. Load Life Max ±5% change in resistance after 3 hours loaded

Phenolic Trimming Potentiometers Pictures

Phenolic Trimming Potentiometers

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Circularity Trimming Potentiometers

May 19, 2009 Views
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Circularity Trimming Potentiometer Features

  1. (Single Turn/ Cermet/ Industrial/ Sealed)
  2. (5 Terminal S tyles)

Circularity Trimming Potentiometers Electrical Characteristics

  • Standard Resistance Range 50Ω - 2MΩ
  • Resistance Tolerance ±5%, ±10%
  • Absolute Minimum Resistance ≤1% R or 2Ω
  • Contact Resistance Variation CRV≤3%or 3Ω
  • Insulation Resistance R1≥1GΩ(100Vac)
  • Withstand Voltage 500Vac
  • Effective Travel 280°

Circularity Trimming Potentiometer Pictures

Circularity Trimming Potentiometers

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7 Terminal Square Trimming Potentiometers

March 26, 2009 Views
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7 Terminal Square Trimming Potentiometers Features

  1. (Single Turn/ Cermet/ Industrial/ Sealed)
  2. (7 Terminal Styles)

7 Terminal Square Trimming Potentiometers Parameters download PDF files Download TSR-3323 - 7 Terminal Square Trimming Potentiometers PDF

7 Terminal Square Trimming Potentiometers - Electrical Characteristics
Standard Resistance Range 10Ω - 2MΩ
Resistance Tolerance ±5%, ±10%
Absolute Minimum Resistance ≤1% R or 2Ω
Contact Resistance Variation CRV≤1%or 2Ω
Insulation Resistance R1≥1GΩ(500Vac)
Withstand Voltage 707Vac
Effective Travel 250°

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Polystyrene Film Capacitors

March 10, 2009 Views
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In these devices, polystyrene film is used as the dielectric. This type of capacitor is not for use in high frequency circuits, because they are constructed like a coil inside. They are used well in filter circuits or timing circuits which run at several hundred KHz or less.

The component shown on the left has a red color due to the copper leaf used for the electrode. The silver color is due to the use of aluminum foil as the electrode.

  • The device on the left has a height of 10 mm, is 5 mm thick, and is rated 100pF.
  • The device in the middle has a height of 10 mm, 5.7 mm thickness, and is rated 1000pF.
  • The device on the right has a height of 24 mm, is 10 mm thick, and is rated 10000pF.
  • These devices have no polarity.

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Multilayer Ceramic Capacitors

March 10, 2009 Views
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The multilayer ceramic capacitor has a many-layered dielectric. These capacitors are small in size, and have good temperature and frequency characteristics.

Square wave signals used in digital circuits can have a comparatively high frequency component included.

This capacitor is used to bypass the high frequency to ground.

  • In the photograph, the capacitance of the component on the left is displayed as 104. So, the capacitance is 10 x 104 pF = 0.1 µF. The thickness is 2 mm, the height is 3 mm, the width is 4 mm.
  • The capacitor to the right has a capacitance of 103 (10 x 103 pF = 0.01 µF). The height is 4 mm, the diameter of the round part is 2 mm.
  • These capacitors are not polarized. That is, they have no polarity.

Ceramic Capacitors

March 10, 2009 Views
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Ceramic capacitors are constructed with materials such as titanium acid barium used as the dielectric. Internally, these capacitors are not constructed as a coil, so they can be used in high frequency applications. Typically, they are used in circuits which bypass high frequency signals to ground.

These capacitors have the shape of a disk. Their capacitance is comparatively small.

  • The capacitor on the left is a 100pF capacitor with a diameter of about 3 mm.
  • The capacitor on the right side is printed with 103, so 10 x 103pF becomes 0.01 µF. The diameter of the disk is about 6 mm.
  • Ceramic capacitors have no polarity.
  • Ceramic capacitors should not be used for analog circuits, because they can distort the signal.

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Farad

March 10, 2009 Views
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A capacitor's storage potential, or capacitance, is measured in units called farads. A 1-farad capacitor can store one coulomb (coo-lomb) of charge at 1 volt. A coulomb is 6.25e18 (6.25 * 10^18, or 6.25 billion billion) electrons. One amp represents a rate of electron flow of 1 coulomb of electrons per second, so a 1-farad capacitor can hold 1 amp-second of electrons at 1 volt.

A 1-farad capacitor would typically be pretty big. It might be as big as a can of tuna or a 1-liter soda bottle, depending on the voltage it can handle. For this reason, capacitors are typically measured in microfarads (millionths of a farad).

To get some perspective on how big a farad is, think about this:

  • A standard alkaline AA battery holds about 2.8 amp-hours.
  • That means that a AA battery can produce 2.8 amps for an hour at 1.5 volts (about 4.2 watt-hours -- a AA battery can light a 4-watt bulb for a little more than an hour).
  • Let's call it 1 volt to make the math easier. To store one AA battery's energy in a capacitor, you would need 3,600 * 2.8 = 10,080 farads to hold it, because an amp-hour is 3,600 amp-seconds.

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