T491B225M020AT40537111

Tantalum Capacitors

T491B225M020AT40537111 is a type of tantalum capacitor, a specialty type of electrochemical capacitor. There are many different types of capacitors, but this type is chosen for many specific applications due to its extremely small size, high energy storage capacity, and relatively long life expectancy. A tantalum capacitor is distinguished by its tantalum electrodes and its non-aqueous electrolyte, which is typically a gel containing some solvents.

Application Field

T491B225M020AT40537111 tantalum capacitors are primarily used in electronics, including in the manufacturing and repair of radios, televisions, automobiles, and other electronic devices. In particular, they are well-suited for high-frequency circuits, particularly those that use high values of capacitance in small, low-voltage circuits. For example, they are often used for antenna tuning, signal filtering, and power supplies. They are also commonly used for by-pass applications and for buffering, as well as for decoupling between different analog or digital circuits.

Working Principle

The working principle of T491B225M020AT40537111 tantalum capacitors is based on electrochemical double layer capacitor or EDLC technology. This denotes the use of two electrodes– usually metallic– and an electrolytic solution to store electrical energy. When the capacitor is charged, the positive ions are attracted to the cathode, while the negative ions are attracted to the anode. This creates a double layer of insulation that blocks direct contact between the electrodes. As a result, the capacitor can store and release charge as needed.

The primary benefit of the EDLC technology is that it facilitates a high energy storage capacity in a physically small device, making it possible to increase the capacitance within a limited space. This, in turn, allows for greater power density and higher switching speeds in circuit designs. In addition, the tantalum material provides the capacitor with a long life expectancy, typically in the range of 10 to 20 years.