M550B507K040AS

Tantalum - Polymer Capacitors, such as the M550B507K040AS, are a type of capacitor comprising of a Ta2O5 dielectric layer on top of a conductive polymer layer. The conductive polymer layer can be either a PEDOT-PSS, an organic conductive polymer, or a mixture of them both.

Application Field

Tantalum - Polymer capacitors are widely used in various types of electronic instrumentation, due to their low impedance and small size compared to traditional capacitors. These capacitors are designed for decoupling for distributed power and voltage spike suppression, and for bypassing and filtering circuits. They can also be used for input/output protection and buffering, switching regulator power supplies and memory back-up applications.

The M550B507K040AS is a popular model, being a highly reliable and stable semiconductor device, with a low equivalent series resistance (ESR) of only 0.04 ohms. The power rating of this part is 50 watts and its temperature range is -55 to +150 degrees Celsius.

Working Principle

Tantalum - Polymer capacitors are constructed of two different layers; the first is an anode layer of tantalum powder and the second is a cathode layer of a conductive polymer material. A Ta2O5 layer exists between these layers; this layer acts as an insulator, providing good capacitance with low leakage values. The manner in which the different layers are deposited onto one another forms the exciting characteristics of the capacitor.

When a voltage is applied across the capacitor, a small amount of electrons become trapped in the polymer layer, causing a miniature current to flow in the device. As the applied voltage increases, so does the amount of current flow, allowing for more electrons to be trapped in the polymer layer. This increased volume of Trapped electrons adds further capacitance to the capacitor, enabling it to handle more load.

The M550B507K040AS also features a low self-heating effect, enabling it to remain reliable over long periods of time. This feature is particularly important in applications that are subject to high temperatures, as the capacitor will not overheat and become unreliable after prolonged use.

Conclusion

Overall, the M550B507K040AS is a highly reliable and stable Tantalum - Polymer capacitor. Its low equivalent series resistance (ESR) and low self-heating effect make it ideal for applications requiring decoupling, voltage spike suppression, bypassing, filtering, input/output protection and memory back-up.