SH101M250ST

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are equipped with aluminum foil having an oxide layer formed by electrolytic oxidation and a film formed of an organic solvent containing an electrolyte. The oxide layer acts as the dielectric and the electrolyte fills the micro-porous voids formed in the oxide layer. It applies a very high dielectric constant, even exceeding that of polyester and other dielectric capacitors.

The SH101M250ST is a miniaturized type of aluminum electrolytic capacitor. It has a small size but still sufficiently large capacitance, making it suitable for many smal applications. The SH101M250ST capacitor is ideal for smoothing and filtering signals in pulsed power supplies, rectifiers, and DC-DC converters. Thanks to its compact construction, it offers high reliability and can handle broad voltage and temperature ranges.

Working Principle

The working principle of an aluminum electrolytic capacitor is based on the physical properties of aluminum foil. Aluminium foil has a naturally created oxidation layer on its surface which acts as an insulator layer. When the positive terminal of the electrolytic capacitor is connected to the aluminum oxide layer, it creates a two layered electric field, consisting of two fluxes in opposition to each other. This causes the electron flow and current flow between them, thus, forming an electric field.

A metal rod is connected to the anode to complete the connection. The anode is connected to the negative terminal and the cathode to the positive terminal of the capacitor. These two electrodes are immersed in an electrolyte solution, like an alkaline or an acid solution. The electrolyte solution helps the electrons to flow from the anode to the cathode.

The electrolyte solution acts as a bridge across which the electrons move. As the electrolyte solution has positive and negative ions in it, the movement of electrons depends on these ions. The electrolyte allows the cathode to be more negatively charged than the anode, thus creating an attractive force. This force causes the electrons to move towards the cathode from the anode.

When the voltage is applied across the capacitor, an electric field is established between the anode and the cathode. This electric field stores energy and produces a capacitance. The capacitance is proportional to the area of the electrodes and the distance between them, as well as the dielectric constant of the material between the electrodes. The capacitance value is expressed in Farads.

Aluminum electrolytic capacitors have very low ESR (Equivalent Series Resistance) values, which makes them ideal for applications that require a high speed response. They are also very efficient in terms of energy storage and can easily handle high ripple currents. Thanks to their compact construction, they require very little space on board and offer high reliability. These features make them suitable for high frequency applications, such as pulse power supplies, rectifiers, and DC-DC converters.

The specific data is subject to PDF, and the above content is for reference