M39003/03-0255/HSD

Tantalum Capacitors

Tantalum capacitors are the most widely used type of electrolytic capacitors due to their high capacitance per unit volume. A typical tantalum capacitor comprises a tantalum oxide dielectric layer, a conductive anode and a conductive cathode. The anode is typically made of a tantalum metal or niobium metal, while the cathode is made from an inert material such as a manganese dioxide. The dielectric layer is a thin film of tantalum oxide that captures electrical charge.

The M39003/03-0255/HSD is a type of tantalum capacitor from AVX. It has a maximum capacitance of 0.0047 μF and a temperature coefficient of -0.07%. It is available in two package types, axial and radial leaded, and its maximum voltage rating is 16 V.

Tantalum capacitors have a wide range of practical applications in electronics. In power supplies, they are used to filter noise, limit ringing, and store energy. In electronic systems, they reduce cross-talk and reduce the propagation delay of signals. In amplifiers, they are used to reduce ripple and prevent oscillations. Tantalum capacitors are also widely used in audio applications, motors, and other electronic circuits.

Working Principle

The working principle of a tantalum capacitor is based on the process of electrochemical double layer capacitance (EDL). In an EDL, a thin dielectric layer is formed between two electrodes, each one containing a positive and negative layer that are separated by the dielectric. The charges of one electrode are stored on the adjacent layer of the other electrode.

When a voltage is applied to the capacitor, an electric field is generated, which polarizes the dielectric layer and allows charges to move between the two electrodes. These charges form an electric double layer on the dielectric, which acts as an additional capacitance in the capacitor. Thus, the total capacitance of the capacitor will be determined by the capacitance of the dielectric layer plus the electric double layer capacitance.

The advantages of tantalum capacitors are their low cost, high capacitance per unit volume, low leakage current, and good temperature stability. They are also suitable for applications that require high current handling or need to meet tight capacitance tolerances.

In conclusion, tantalum capacitors are widely used in a variety of applications due their high capacitance per unit volume, low leakage current, and excellent temperature stability. The M39003/03-0255/HSD is a type of tantalum capacitor from AVX with a maximum capacitance of 0.0047 μF and a temperature coefficient of -0.07%. Its working principle is based on the process of electrochemical double layer capacitance.