199D685X9025C2A1E3

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Tantalum capacitors, or tantalum electrolytic capacitors, are devices composed of tantalum in a pitted oxide form, immersed in an organic solvent liquid and separated from a counter electrode by an ion-permeable membrane. The devices are formed from two sheets of metal foil, with their surfaces coated active material. This is typically an oxide of tantalum or niobium, but can be any other material with a capacitive load, such as ceramics, plastics or quartz. These capacitors are used in a wide range of applications due to their small size, high capacitance, and low leakage current.

The most common use of tantalum capacitors is in high-frequency DC-DC converters, as they do not suffer from reactance losses as much as other types of capacitor. They are also used in low-frequency AC circuits, and in transmitter and receiver design. Other applications include EMI suppression, noise filtering, and power conditioning networks.

The specific product code "199D685X9025C2A1E3" is a standard part from manufacturer Vishay Corporation and is a resin-molded chip type surface-mount capacitor. It has a capacitance of 680uF, rated at 25Vdc, with a tolerance of +/- 20%. The operating temperature range is between -55 and +105 degrees Celsius, and the lifetime of the part is 2000 hours, depending on the application.

The working principle of a tantalum capacitor is the same as that of any other capacitor: when a voltage is applied across the two plates, electric charges accumulate on each of them. This produces an electrical field between the two plates, as if a dielectric material was present, even though such material is not really there. This electric field is capable of storing an electrical charge, which is the same as having a capacitor.

The main benefit of a tantalum capacitor is its high capacitance to size ratio, combined with its very low internal resistance and low self-discharge current. This makes it suitable for high frequency applications, as it can provide very low impedance at high frequencies, which means that there is less power dissipation in the load resistance. Additionally, the low internal resistance of the device helps reduce EMI, which is necessary for sensitive data and communication applications.

Tantalum capacitors have significant advantages over other types of capacitors, they are very tolerant to temperature, they have very low leakage current and they can have very high capacitance values relative to their size. For these reasons they are used extensively in surface mount applications, as they can save both time and space due to their small size, high performance and longer lifetime.

In conclusion, tantalum capacitors are widely used in all types of applications, due to their small size, high capacitance, and low internal resistance and leakage current. They are particularly well-suited to surface mount technology because of their low profile and are often used in high-frequency DC-DC converter applications. Additionally, tantalum capacitors are typically very tolerant to temperature and can typically handle higher power loads than other types of capacitors.

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