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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are polarized, electrolytic capacitors that are most commonly used in electronics circuits. They offer large capacitance values in a relatively small package, and are commonly used for coupling, decoupling, filtering, and voltage-regulating applications. The most commonly used type is the 250LEX6R8MEFC8X11.5 aluminum electrolytic capacitor.

Application Field

The 250LEX6R8MEFC8X11.5 aluminum electrolytic capacitor is suitable for applications that require high capacitance values, such as high voltage filtering, EMI/RFI suppression, and signal isolation. It is also commonly used as a power supply filter, for bypassing energy to the ground, and as a surge protector. This capacitor can also be used in motor control and automotive circuits, as well as digital and analog circuits.

Working Principle

The 250LEX6R8MEFC8X11.5 aluminum electrolytic capacitor is a polarized capacitor. That means it requires a positive and a negative terminal. It is constructed from an anode (positive terminal) which is made from a rolled sheet of aluminum foil, and a cathode (negative terminal) that is composed of a wet, non-conductive electrolyte. The electrolyte is impregnated into the rolled foil and acts as an insulator and as a separator between two conductive plates of an electric element, such as an inductor or a resistor.

When the capacitor is charged, positive ions from the electrolyte are attracted to the anode. This creates a concentration of positive ions, or a “dielectric,” at the anode, and negative ions at the cathode. This causes an electrical field to form between the two plates, which has the effect of storing energy which can then be discharged when requested.

The 250LEX6R8MEFC8X11.5 aluminum electrolytic capacitor is rated for a capacitance of 6.8μF and a voltage of 11.5V. It has a typical capacitance tolerance of ±20%, and a maximum operating temperature of 125°C. This capacitor is polarized, which means that the anode and the cathode must always stay in the proper orientation. It is also an axial capacitor, which means it has leads that extend from both ends, and is typically mounted in a through-hole style.

Conclusion

The 250LEX6R8MEFC8X11.5 aluminum electrolytic capacitor is a versatile and reliable capacitor suitable for a variety of applications. Its high capacitance values, combined with its compact size, make it an excellent choice for many electronics circuits. Its polarized design and axial lead style also allows it to be easily integrated into a wide range of circuits.

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