M39003/03-0338H

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Tantalum capacitors, sometimes referred to as "tantalum chips" or "tantalum electrolytic capacitors", are highly functional electrochemical capacitors. Tantalum capacitors are widely used in high-density circuits because they are very compact and offer high capacitance/volume ratios. The specific type of tantalum capacitor addressed in this article is the M39003/03-0338H. Although there are many different types, there are a few common features shared by all tantalum capacitors.

Application Field

Applications for tantalum capacitors include high-speed digital circuits, low-frequency variable devices, oscillators, and high-frequency filtering applications. In addition, they can be used in DC-to-DC converters, especially in circuits that require temporary bypassing or decoupling high-voltage transients. For example, they are commonly used in automotive and avionics components. They are also used in cameras, medical equipment, communications equipment, and other electronic devices.

Working Principle

Tantalum capacitors are constructed from two components. The first is a capacitor body, which is made out of tantalum powder. This powder has a very high surface area, allowing for the capacitor to store an increased amount of charge. The other component is a dielectric layer, which is usually made out of an oxide, nitride, or oxynitride material. This layer acts as an insulator between the capacitor body and the outer case.

Tantalum capacitors are polarized devices, meaning that there is an anode and a cathode. The anode is connected to the capacitor body, and the cathode is connected to the dielectric layer. When an electric field, or voltage, is applied, a current begins to flow from the anode to the cathode. This current then charges the capacitor up, like a battery.

The charge stored in the capacitor can then be used as a source of power. The discharge rate depends on the capacitance of the capacitor, as well as the amount of charge that was stored in it. The more capacitance the capacitor has, the more charge it will be able to store, and the longer it will be able to supply power before it needs to be recharged.

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