ALS71A273NT250

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, widely known as electrolytic capacitors, are capacitors whose anode is made of aluminum and whose cathode is a wet electrolyte made of a solution of anhydrous aluminum oxide. They are divided into polar capacitors and non-polar capacitors. Aluminum electrolytic capacitors are widely used because of their low cost, high capacitance, long life and good stability.

ALS71A273NT250

The ALS71A273NT250 is an aluminum electrolytic capacitor. It is designed to provide effective capacitance performance and reliability. This capacitor offers a total capacitance of 18 µF with a rated voltage of 25 V. The unit is packaged in a DIP-7 (DIP14) shell with an insulated case and an epoxy resin-filled top for easy installation. The device features low equivalent series resistance (ESR) and excellent low self-inductance. The capacitor also provides good long-term stability, good operation temperature performance and a long service life.

Application Field

The ALS71A273NT250 aluminum electrolytic capacitor is widely used in power supplies, telecommunications, industrial and consumer electronic equipment and more. It can be used in various power supply circuits, such as step-down circuits, buck and boost circuits, and voltage stabilization circuits. Also, it can be applied in low-voltage DC-DC circuits, filter circuits, and AC and DC solid state relays.

Working Principle

An aluminum electrolytic capacitor is a polarization capacitor with a dielectric consisting of thin layers of metal oxide. The oxide film acts as the dielectric material, separating the two metalized electrodes which are separated by a spacer. The aluminum metalized electrode is formed by etching aluminum foil. The oxide film formed on the aluminum foil acts as a dielectric, while the wet electrolyte is used as a cathode. When current flows through the electrolyte, electrons that flow on the aluminum foil form a layer of charge, which attracts other electrons and forms a layer of charge on the electrolyte layer. When a potential difference is applied to the two electrodes, charges form on the oxide layer, forming an electric field between the two electrodes.

As voltage increases, more charges form on the oxide layer, increasing the capacitance. As voltage continues to increase, the electrostatic force between the oxide layer increases, and eventually the oxide layer can no longer bear this force and break down. After breakdown, current flows between the two electrodes, causing the capacitor to fail.

The ALS71A273NT250 is designed to work in environments with temperatures ranging from -55 ℃ to +105℃ and an operating frequency of up to 1000 Hz. The capacitor can reliably handle long-term and repeat operations, and enables efficient and reliable operation in low-voltage DC-DC converters, filter circuits, and AC and DC solid state relays.

In conclusion, the ALS71A273NT250 aluminum electrolytic capacitor is a reliable and efficient device for various power supply and voltage stabilization circuits. It is an ideal solution for applications requiring high capacitance and low equivalent series resistance.