TR3D156K035C0300

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Tantalum capacitors are polarized, electrochemical capacitors with an anode made of a sintered tantalum pellet, typically coated with a MnO2 layer. They feature values as high as 10 µF in a very small case size such as 0402 and are used in situations where capacitance and size are important. The major advantage of tantalum capacitors is the fact that they offer a very high volumetric efficiency, meaning that a high amount of capacitance is offered in a very small package. The TR3D156K035C0300 is a typical product in this arena.

Application Field

The TR3D156K035C0300 and other tantalum capacitors are widely used in many application fields and for a variety of applications. Common uses for tantalum capacitors include:

• Clock or oscillator circuits in timers and computers
• Bypass and coupling capacitors in discrete component amplifiers
• Coupling capacitors in integrated circuit (IC) amplifiers
• Energy storage capacitors in various applications such as medical instrumentation, assistive medical equipment, and industrial controls
• Filter capacitors in power supplies and high-voltage transformers

Tantalum capacitors are also finding new application fields such as dc-dc converters and automotive applications. Throughout their wide range of applications, they are especially useful when a large capacitance is required in a small package.

Working Principle

Tantalum capacitors are based upon a tantalum-oxide layer formed on the anode surface. The value of the capacitance is determined by the amount and characteristics of the oxide layer. The advantage of using a tantalum-oxide layer is that the dielectric constant (or permittivity) is very high, allowing an extremely high capacitance in a very small package. Furthermore, the material is very stable, allowing the use of relatively large leakage currents.

When a bias voltage is applied, two processes occur simultaneously: dissociation of oxygen molecules on the tantalum surface and oxidation of the tantalum metal, creating a layer of tantalum pentoxide (Ta2O5). This layer acts as a dielectric, reducing the effective distance between the anode and the cathode and increasing the capacitance. At the same time, an electric field is generated across the oxide, resulting in a local current flow which leads to further oxidation of the tantalum electrodes.

As the oxide layer thickens, the capacitance increases and the voltage across the oxide reduces. Once the oxide becomes thick enough, the capacitance reaches its maximum value for a given geometry and bias voltage, and the voltage across the oxide cannot reduce any further (i.e. the oxide is saturated). At this point, the voltage is known as the rated voltage of the capacitor. If the bias voltage increases beyond the rated voltage, the oxide may break down, resulting in an electrical short.

In terms of their construction, tantalum capacitors consist of a tantalum shutter (anode) and a manganese dioxide cathode, separated by an electrolyte. The anode is surrounded by a dielectric and the whole package is encapsulated in an epoxy resin.

Tantalum capacitors offer a very high volumetric efficiency and a wide range of applications. The TR3D156K035C0300 is a typical product in this arena, and it is widely used for various applications such as clocks, oscillator circuits, bypass capacitors, coupling capacitors. energy storage capacitors, and filter capacitors.

The specific data is subject to PDF, and the above content is for reference