UPS2A681MHD

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are commonly used in power supplies, including UPS systems. The UPS2A681MHD is an electrolytic capacitor that is designed for high voltage applications. It has a rated voltage of 450 VDC and a capacitance of 681 μF. It also has a very low equivalent series resistance (ESR) of 0.0033 Ω.

Application Field

The UPS2A681MHD is designed to be used in high voltage applications, such as the power supply for TV sets, computers, AC/DC adaptors, and other electronic equipment. Its low equivalent series resistance makes it suitable for high frequency switching power supplies and power conditioning.

Working Principle

An aluminum electrolytic capacitor is composed of an anode, a cathode and an electrolyte. The anode is composed of a strip of aluminum foil which is rolled into a cylinder. The cathode is a strip of electrolytic paper which is soaked in electrolyte. When voltage is applied to the capacitor, metal ions (positively charged) travel through the electrolyte to the anode and become deposited on the aluminum foil. This causes a buildup of positive ions, or a "charge" which is the capacitance of the capacitor.

In the UPS2A681MHD capacitor, the aluminum foil is rolled into a cylinder shape, with an electrolyte in between the anode and the cathode. This design allows for a denser capacitance in a small space, resulting in a higher capacitance for the same size capacitor.

Conclusion

The UPS2A681MHD is a high voltage aluminum electrolytic capacitor designed for applications requiring high capacitance and low equivalent series resistance. It is suitable for high voltage, high frequency switching power supplies and power conditioning. The low ESR makes it an ideal choice in such applications.