Aluminum - Polymer Capacitors

Aluminum-polymer capacitors, also known as aluminum electrolytic capacitors, are electrolytic capacitors with an anode made of a pure aluminum foil with an etched surface coated with an insoluble electrolytic compound. This compound acts as the dielectric, providing capacitance and stability against voltage surges. The back surface of the aluminum foil is insulated with a thin plastic film to prevent direct electrical contact with the opposite polarity of the anode.
The aluminum-polymer capacitor provides many features that are useful and desirable in a variety of applications, including high capacitance, high temperature stability, high levels of both AC and DC voltages and long life. Other features include excellent resistance to mechanical shock and vibration, low ESR (Equivalent Series Resistance) and superior reliability in difficult operating environments.

Application Field of 10SVPC120M

The 10SVPC120M Aluminum-Polymer Capacitor is widely used in low-to-medium current applications such as power supplies, circuits that cope with high-frequency transients, LED drivers, DC-DC converters, and other noise elimination circuits. It is also particularly suitable for battery-driven equipment, automotive systems, and other devices that require low ESR.

Working Principle of 10SVPC120M

The 10SVPC120M capacitor has an anode made of pure aluminum foil with an etched surface. This forms a capacitor where the anode acts as the positive electrode and the opposite polarity is formed by the electrolytic compound coated onto the aluminum foil. When voltage is applied across the capacitor, a current passes through the gate oxide, resulting in a voltage drop across the oxide. This voltage drop creates a potential difference between the anode and the electrolyte, allowing electrons to move from the anode to the electrolyte and thus creating a current. The current results in the buildup of charge at the interface between the aluminum foil and the electrolyte, thus forming a capacitance. Due to the excellent capacitance and low ESR characteristics of this capacitor, it is suitable for applications involving high frequency transients and noise elimination circuits.

Conclusion

The 10SVPC120M aluminum-polymer capacitor is a great choice for low-to-medium current applications that require excellent capacitance and low ESR. Its anode is made of a pure aluminum foil with an etched surface and is coated with an insoluble electrolytic compound to serve as the dielectric. It provides features such as excellent resistance to mechanical shock and vibration, high temperature stability, high levels of both AC and DC voltages and long life.