299D476X9025FB1E3

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Tantalum capacitors, also known as tantalum electrolytic capacitors, are widely used in today\'s electronics devices due to their relatively low cost, small size, and high capacitance values. The capacitors consist of two plates, a tantalum plate and a dielectric layer. The tantalum plate acts as the positive electrode while the dielectric layer separates the two plates and is responsible for the capacitance. The tantalum capacitor designation code "299D476X9025FB1E3" indicates the following:

• 2 = Capacitance tolerance +/- 20%
• 99D = Rated voltage (25VDC)
• 476 = Case size code (4.76mm height)
• 90 = Termination code (90°Wire lead)
• 25 = Temperature Coefficient (25ppm/°C)
• FB = Dielectric type (Tantalum)
• 1E = Lead finish (Silver-plated)
• 3 = Capacitance value (47uF @ 24VDC)

Tantalum capacitors have a number of advantages over other capacitor types, including their small size, high capacitance values, low ESR, and excellent stability over time. They are also resistant to thermal shock, vibration, and are non-polarized, which means they can be used in applications where other capacitors cannot. While tantalum capacitors have a much lower internal resistance than aluminum electrolytic capacitors, they are also more expensive.

The working principle of tantalum capacitors is based on the electrostatic attraction between the two plates. When a voltage is applied across the two plates, one plate becomes positive and the other negative. This results in an electrostatic field which attracts an opposing charge to the negative plate. This charge compensates for the positive charge on the positive plate, creating a low capacitance between the plates. This low capacitance acts as a storage medium for energy, allowing the capacitor to store charge. When the voltage is no longer applied across the capacitor, the stored charge slowly diffuses and the capacitor loses its stored energy.

Tantalum capacitors have a variety of applications in electronics. They are widely used in power supplies, portable electronic devices, integrated circuits, and even automotive applications. They are also used in military and aerospace applications, due to their ability to withstand extreme temperatures and vibration. The higher temperature tolerances and higher capacitance values of tantalum capacitors than those of other types of capacitors makes them ideal for applications where large amounts of energy storage is required.

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