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Tantalum Capacitors

Tantalum capacitors are one of the most common types of capacitors used in many different industries. They are a type of electrolytic capacitor that is constructed with two distinct neutral parts: one is a tantalum metal oxide sintered anode and the other is a metallic cathode. The anode terminal is usually marked with a black band indicating the negative lead. This type of capacitor is capable of handling a wide range of voltage levels, and when connected in series or parallel can be used for different functions in circuits.

The T86D156K020EBSS is a popular type of tantalum capacitor. It is a chip type capacitor with a voltage rating of 20 VDC and a capacitance rating of 0.156 μF. The T86D156K020EBSS is typically used in high-speed, high-frequency circuits as it is able to provide effective energy storage. It is also suitable for use in many different applications including switching regulators, power supplies, audio circuits, digital video circuits, and communication systems.

Application Field

Tantalum capacitors are commonly used in a wide range of circuits and applications. These include power electronics, consumer electronics, industrial electronics, automotive applications, commercial applications, telecom equipment, and aerospace applications.

In power system applications, tantalum capacitors are used to stabilize DC power supply, reduce noise and transient spikes, filter input signals, improve mechanical shock resistance for any power supply device, and help reduce power consumption. They are also used to increase ripple current ratings as well as ripple voltage ratings.

In consumer electronics, tantalum capacitors are used for decoupling, filtering, and bypassing of audio signals, as well as for increasing the life span of devices. They are also used for memory backup, repair of electronic equipment, increasing the performance of communication systems, and in the manufacture of high-end audio equipment.

In industrial electronics, tantalum capacitors are used to reduce the effect of transients and noise, to reduce the size of packaging, and to improve the performance of controllers, motor drives, and converters. In the automotive industry, they are used to filter and protect power functions, for decoupling, and for shielding in any circuit.

In telecom equipment, tantalum capacitors are used for filtering, improving the performance of receivers and antenna systems, for bypassing noise and vibration, and for voltage regulation. In aerospace, they are used for increasing the reliability and performance of electronic systems, for shielding, and for voltage regulation.

Working Principle

Tantalum capacitors are constructed of two terminals that are connected by a dielectric material, usually a tantalum dioxide film. The terminals are typically connected to a dielectric layer and metal electrodes. When voltage is applied to the terminals, the dielectric layer becomes electrically charged, meaning that current will flow through the capacitor. This will cause a charge to build up on the two electrodes, creating a stored energy known as a dielectric polarization.

The charge stored in a tantalum capacitor changes as the applied voltage changes, combined with the built-in capacitance of the device as determined by its physical characteristics. This is known as capacitance ratio or capacitance tolerance. When the voltage is removed from the capacitor, the charge stored in the dielectric slowly dissipates over time, and the device can then be reused.

When selecting a tantalum capacitor, it is important to consider the ratings such as voltage, temperature, capacitance, and other parameters to ensure that the part is capable of meeting the requirements of the application. It is also important to consider the environmental conditions of the application, such as the amount of vibration and shock it will be subjected to.

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