M39003/01-5502/HSD

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Tantalum Capacitors

Tantalum capacitors are electrical components with capacitance value that suffers minimal change with time and temperature. They are constructed from tantalum, which is a highly stable, and an almost fully insoluble metal. The most basic tantalum capacitor consists two electrodes: the anode and the cathode, separated by an electrolyte, within an insulator. The anode electrode is generally made of pure or sintered tantalum powder, and the cathode is made of an oxide derived from tantalum, which is usually MnO₂. The M39003/01-5502/HSD is one of the most common types of tantalum capacitors. Its working principle can be classified into three separate categories: electrostatic, dielectric, and mechanical. In electrostatic working principle, the two electrodes in a capacitor are separated by an insulator. The anode and the cathode have a strong electrostatic attraction. When a voltage is applied to the positive and negative plates, electrons move from the negative plate to the positive plate, creating a charge separation. This creates an electric field between the two plates, known as capacitance. The capacitance value is determined by the amount of charge and dielectric constant of the insulator between the two plates.In the dielectric working principle, the insulator serves as the dielectric at the anode and cathode electrodes. When the voltage is applied to the electrodes, a dielectric polarization effect occurs in which the ions of the dielectric material move to one of the electrodes. This creates an electric field also known as capacitance, and its magnitude is determined by the dielectric constant, thickness and area of the dielectric material.In the mechanical working principle, the two capacitors are separated by a mechanical element, such as a spring or a diaphragm. When a voltage is applied to the plate, the mechanical element compresses or expands, causing the capacitance to change. The M39003/01-5502/HSD is an ideal choice for applications where the ability to store charge is required, such as in the power supply line of a computer or portable device. The use of tantalum capacitors is particularly useful in situations where the ability to store charge is desired, but the size of the component needs to be kept to a minimum.

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