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Tantalum Capacitors

Tantalum capacitors are electrochemical capacitors with an anode made of tantalum on which an oxide layer is formed using anodization. This oxide layer acts as the dielectric material in the capacitor and allows the construction of very small capacitors with capacitance values ranging from 0.1 microfarad to 10,000 microfarads.

M39003/09-4023H Application Field and Working Principle

The M39003/09-4023H tantalum capacitor is a monolithic surface-mountable device that is mainly used in high-reliability audio and aerospace applications. It is designed to meet all performance specifications in aerospace environments, and is available in various capacitance values and voltage ratings. The device is also suitable for high vibration, high shock, and extended temperature applications.

The M39003/09-4023H tantalum capacitor consists of a solid manganese dioxide electrolyte, two tantalum foil electrodes, and a solid dielectric layer. The dielectric layer is made from tantalum pentoxide, which provides an exceptionally high dielectric strength relative to its size. The electrodes are made from chemically pure tantalum foil which is chemically bound to the dielectric layer. The capacitor is then sealed with a resin-sealed plastic envelope, which provides superior corrosion protection.

The working principle of the M39003/09-4023H tantalum capacitor is based on the electrochemical process of anode oxidation. When the capacitor is connected to a power source, the anode is oxidized and reduced simultaneously. This process results in the formation of a stable dielectric oxide layer on the anode. The oxide layer acts as the dielectric material in the capacitor and creates an electrical field between the anode and the cathode. This electrical field stores electrical charge and is responsible for the capacitance of the unit. The oxide layer also acts as an insulator, which prevents a short circuit.

The M39003/09-4023H tantalum capacitor provides excellent performance, and is widely used in various applications such as audio and CCTV systems, power supplies, frequency filters, and pulse shaping circuits. It is widely used in aerospace applications due to its high voltage and temperature performance. Due to its small size, high capacitance, and low ESR, it is an ideal choice for space-constrained applications.

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