URU2W220MRD

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used in various applications such as computers, automotive, and power supplies. One of their most common uses is to provide energy storage and filtering in power supplies. The URU2W220MRD is an example of such a capacitor, and it is important for users to understand its application field as well as its working principle.

Application Field

The URU2W220MRD aluminum electrolytic capacitor is a radial-leaded capacitor specifically designed for use in computer switching power supplies. It is mainly used in power supply filtering, and its non-polarized electrolyte ensures that it is suitable for both AC and DC circuits. It is also ideal for high-frequency noise reduction. Additionally, the URU2W220MRD has excellent long-term reliability for applications with high ripple currents, such as computer switching power supplies

Working Principle

An aluminum electrolytic capacitor is composed of an aluminum foil working as an anode, and a paper separator treated with electrolyte soaked in it, used as a cathode. An electrolytic capacitor, unlike a normal ceramic capacitor, has a higher capacitance value. When the applied voltage on the capacitor is greater than the polarization voltage, electrons are drawn to the anode side of the capacitor, which causes the depletion layer at the interface of the anode and the electrolyte to become very thin, thus increasing the capacitance of the capacitor. The capacitor also exhibits a non-linear voltage-current relationship when current flows into the capacitor.

The URU2W220MRD stands out among other electrolytic capacitors as it has an extremely low equivalent series resistance (ESR). In addition to low ESR, it has an improved ripple current rating up to 220%. The URU2W220MRD provides high capacitance values ranging from 1000µF to 8000µF, and the maximum rated operation temperature can go up to 85°C. This makes it suitable for high-temperature applications such as power supplies.

In summary, the URU2W220MRD is an aluminum electrolytic capacitor specifically designed for use in power supplies and computer switching power supplies. It has low ESR and high ripple current ratings and offers operating temperatures of up to 85°C. Its non-polarized electrolyte ensures that it is suitable for both AC and DC circuits.