M39003/03-2007/TR

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Tantalum capacitors, or tantalum electrolytic capacitors, are an important type of capacitor used in electronic equipment. They are based on the same principles as other electrolytic capacitors, but have some subtle differences. They were first introduced in the 1970s and have become a popular choice for linear-type power supplies, as well as audio and radio equipment. M39003/03-2007/TR defines the application field and working principle of tantalum capacitors.

Tantalum capacitors are composed of two capacitors sandwiched together, with a porous layer of tantalum in between. A tantalum electrolyte is then used to fill the electrode and the electrolytic layer. This combination creates a capacitor with a relatively high capacity, even though the size of the device remains small. The main working principle of tantalum capacitors is that they can store electrical energy in the form of an electrical field between their two capacitors in much the same way as electrolytic capacitors.

Tantalum capacitors are widely used in the electronics industry, especially in high-frequency electronic equipment as they have a low equivalent series resistance (ESR). The low ESR allows them to switch quickly and reduces the chance of interference with other parts of the circuit. They are also often used in power supplies and other low-frequency applications as their low impedance characteristics can help reduce ripple current. In addition, the high capacitance of tantalum capacitors means that they can hold a lot of energy in a relatively small package.

Tantalum capacitors are available with either leaded or surface-mount terminations. The two most common types of tantalum capacitors are the molded solid electrolytic and the wet electrolytic. The molded solid electrolytic type has a higher temperature range and a better tolerance for ripple current, while the wet electrolytic type has a lower temperature range and a lower tolerance for ripple current. Both types are versatile and come in a variety of sizes and capacitance values.

Tantalum capacitors have a number of advantages over other capacitor types. One of the main advantages of tantalum capacitors is their high capacity and low ESR. This allows them to store more energy in a smaller package. In addition, their low impedance characteristics help reduce interference and improve the performance of power supplies and other low-frequency applications. Finally, they are usually cheaper than other capacitor types, making them particularly suitable for cost-sensitive applications.

M39003/03-2007/TR is a standard that defines the application field and working principles for tantalum capacitors. The standard outlines how to select, test and install tantalum capacitors based on type, voltage rating, capacitance, temperature range and ripple current. In addition, the standard provides guidance on how to select the correct mounting method, and outlines the criteria for testing and verifying the performance of these components.

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