T520C337M004ATE025

Tantalum capacitors are capacitors which employ tantalum as the anode material. It is mainly used in applications requiring low incremental currents, high-frequency operation, and/or high stability. The majority of tantalum capacitors are electrolytic and are polarized, however, non-polarized versions are also available. Tantalum capacitors are typically classified into two main varieties: wet and polymer. T520C337M004ATE025 is of the latter, "polymer", kind.

Application Field

The T520C337M004ATE025, as a kind of tantalum capacitors, is typically used in high performance and vital applications which demand reliability, high capacitance, and low resistance. Its commonly used in devices that need power conditioning, such as:

• Cell phones
• Computers
• Industrial equipment
• Automotive electronics
• High frequency systems, including radar systems

Tantalum capacitors can also be found in medical equipment, power supplies, and military systems.

Working Principle

Tantalum capacitors use essentially the same principles as all capacitors and work with both AC and DC currents. The capacitor consists of an anode and cathode plate, both separated by a dielectric. Like a conventional electrolytic capacitor. The anode of T520C337M004ATE025 is a sheet of tantalum powder pressed and sintered into a foil, it takes the shape of a pellet or cylindrical case. This is the thing that includes the dielectric material, which is an oxide layer. The construction of a polymer capacitor is similar to that of an electrolytic capacitor, but has a coating of a special electrolyte containing a polymer material rather than a solid and wet electrolyte, which is the main difference. This polymer material acts as an absorption agent to reduce the temperature coefficients and results in a better stability of the capacitance.

The polymer electrolyte works much like the wet electrolyte, but provides an even lower impedance and ESR. The oxide layer forms the dielectric layer, which is covered by a second electrode, the cathode. The cathode is usually an aluminum foil. When a potential difference is applied between the anode and cathode, a charge can flow between them and an electric field forms across the dielectric. This electric field creates an energy storage effect, and the T520C337M004ATE025 capacitor, as with other capacitors, can store energy.