T491B105K035AT7280

Tantalum Capacitors

T491B105K035AT7280 is a type of tantalum capacitors. A tantalum capacitor is a type of electrolytic capacitor, a passive electronic component consisting of a pellet of tantalum metal as an anode, covered by an insulating oxide layer that forms the dielectric, surrounded by a conductive material as a cathode. The tantalum capacitor provides several advantages over a regular aluminum electrolytic capacitor, the most apparent being a much higher capacitance-to-volume ratio, i.e. larger capacitance for a given unit of volume.

Application Field

The T491B105K035AT7280 is well-suited for most general purpose applications, such as cell phones and computers, to high-end audio systems as well as automotive, military, aerospace and telecom applications. They are also used in portable medical devices, cameras, remote controls, industrial and battery chargers.

These capacitors are ideal to use in applications that require high capacitance, small size, and low profile, such as PC boards, power supplies, and power converters, as they offer a high capacitance in a small package. Additionally, their low impedance provides an effective shield in high frequency applications. Moreover, their design is robust and offers superior performance than regular aluminum electrolytic capacitors.

Working Principle

T491B105K035AT7280 capacitors are polarized capacitors; the anode is typically made of tantalum or niobium, the dielectric is a tantalum-oxide layer, and a cathode made of a conductive material such as manganese dioxide. The manganese dioxide provides ionic conduction, while the inductive part of the current is supplied by the cathode. The outermost layer of the cathode is typically a conducting material such as silver.

The electrolytic process of a tantalum capacitor begins with the formation of a thin insulating layer between the anode and cathode; this is usually achieved by a chemical reaction between the oxide layer and the electrolyte in the capacitor. This oxide layer is the dielectric, and is responsible for the capacitor\'s ability to store energy. This is further strengthened by the impregnation of polymer between the anode and cathode, and the result is a high quality, long lasting capacitor.

The tantalum capacitor typically produces a lower optical dissipation factor and ESR than other types of capacitors. This allows for better application in high frequency and high speed circuit applications such as power supplies, motor drives and amplifiers, where size and efficiency are important considerations.

Conclusion

The T491B105K035AT7280 is a type of tantalum capacitor, a polarized electrolytic capacitor offering high capacitance-to-volume ratio, low optical dissipation factor, long lasting performance and robust design. The capacitor is suitable for general-purpose, high-end audio, automotive, military, aerospace and telecom applications, as well as portable medical devices, cameras, remote controls, industrial and battery chargers. The working principle of the tantalum capacitor is based on the formation of a thin insulating layer between the anode and the cathode, along with a polymer impregnation that further strengthens its performance.