T356E106K025AT7301 Capacitors

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Tantalum Capacitors

Tantalum capacitors, also known as Ta capacitors, are a type of electrolytic capacitors that make use of the higher capacity and stability of tantalum as the electrode material. Tantalum capacitors are available in both surface-mount and leaded configurations, with a wide range of capacitance values and sizes. A tantalum capacitor with the part number T356E106K025AT7301 is a surface-mount device with a rated capacitance of 25µF, a voltage rating of 10V, and an operating temperature range of -55°C to 105°C.

Application Field

Tantalum capacitors are suitable for use in a variety of applications, including power supplies, audio equipment, voltage regulator circuits, and automotive electronics. The robust design of the capacitor allows it to withstand the exposure to high temperatures and humidity, as well as mechanical shock and vibration. The low ESR rating of tantalum capacitors makes them ideal for use in noise-sensitive circuits and high-frequency applications, where the ESR rating can affect the performance of the circuit.

Working Principle

Tantalum capacitors make use of an anode made of tantalum metal and a manganese dioxide (MnO2) cathode. The anode is coated with a thin coating of MnO2 and a dielectric layer is applied to both the anode and cathode. When a voltage is applied across the tantalum capacitor, an electric current flows through the capacitor and charges the MnO2 layer, which acts as a dielectric material. The charge stored in the MnO2 dielectric layer is responsible for creating the electrical capacitance in the device. The capacitance of the capacitor is determined by the thickness of the dielectric layer and the surface area of the metallized electrodes.

When the current passes through the tantalum capacitor, the charge at the anode is attracted to the cathode due to the attraction between ions and oxygen. This attraction causes a thin film of ionized oxygen to form on the surface of the anode and the capacitor is able to store a fixed amount of charge in the dielectric layer. Since the total charge stored in the capacitor is limited, the capacitance (in Farads) is limited and the device exhibits a non-linear capacitance-voltage response.

The tantalum capacitor is relatively stable over a wide temperature range, with a low temperature coefficient of capacitance and low leakage. The device is also highly reliable, with high insulation resistance and low Equivalent Series Resistance (ESR) and good long-term stability.

In general, tantalum capacitors are extremely versatile and can be used in both high and low voltage circuits, as well as in applications with varying environmental conditions. They provide high capacitance and low ESR in a small package, making them ideal for small form factor applications.

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