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Aluminum Electrolytic Capacitors

An aluminum electrolytic capacitor, named after its two electrodes, is an electrical component that is made up of an aluminum foil with its surface etched with a series of ridges to increase its capacitance, combined with any non-conductive material (a dielectric) and with an electrolyte. These capacitors are mostly used for storing electrical energy and sometimes to increase the voltage or current in an electrical system. The specific UKL1C681MHD is an example of an aluminum electrolytic capactor.

Application Field and Working Principle

Aluminum electrolytic capacitors are usually used for signal or power decoupling, timing, filtering, energy Storage, energy conversion, output smoothing, over-voltage protection, buffer and transfer, etc. They are widely used in communication, computer, automotive, video and audio, consumer, medical, power electronics, industrial control, and other areas.

The working principle of an aluminum electrolytic capacitor is that it utilizes the electrostatic energy by electric field to store energy via physical force. It has two electrodes, one is the anode usually made of aluminum, and the other is the cathode made of a metal oxide on an electrolytic paper. The anode has etched ridges to increase its surface area and capacitance. An electrolyte is placed between the anode and electrolytic paper. When a DC voltage is applied across the anode and cathode, a separation layer of oxide film will form across the anode which allows current to flow while blocking electrons. The oxide layer will become thicker with increasing voltage, and its capacitance increases accordingly.

Aluminum electrolytic capacitors are not as reliable as other types of capacitors, such as ceramic capacitors. They also have a higher leakage current and higher equivalent series resistance (ESR). Furthermore, they are also generally more expensive than other types of capacitors due to their complexity in manufacturing process. However, aluminum electrolytic capacitors are popular due to their high capacitance, low inductance, and ability to be used within high temperature and high voltage.

UKL1C681MHD

The UKL1C681MHD is an aluminum electrolytic capacitor made by TDK-Lambda Corporation. It is a radial leaded capacitors with tin-plated stainless steel screws. It has a capacitance of 680uf at a rated voltage of 200V. It is capable of operating within the temperature range of -40 to +105°C and it is suitable for use with AC line frequencies of 50/60Hz. It also has a self-healing feature which allows the capacitor to automatically repair short circuits that may occur during operation.

UKL1C681MHD is used in power supplies, as well as audio and video equipment. It can be used as a charge capacitor, output smoothing capacitor, or as an energy storage device for short time periods.

Conclusion

The UKL1C681MHD is an aluminum electrolytic capacitor made by TDK-Lambda Corporation. It is suitable for use as a charge capacitor, output smoothing capacitor, or as an energy storage device for short time periods. It utilizes electrostatic energy by electric field to store energy via physical force and it has higher capacitance, lower inductance, and ability to be used within high temperature and high voltage. It is widely used in communication, computer, automotive, video and audio, consumer, medical, power electronics, industrial control, and other areas.

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