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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used in high power circuits, due to its relatively low internal resistance and fast charge and discharge which is necessary for speed and accuracy of operation. The 250BXC33MEFCGA12.5X20, is an aluminum electrolytic capacitor, with a capacitance value of 33uF, a working voltage of 250V, and a size of 12.5x20mm.

Application Field

The 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is primarily used in high power circuits, particularly those with alternating current. This cap can be used for filtering, decoupling, or bypass applications. It is especially useful in circuits where fast charge and discharge is necessary, such as high-frequency switching power supplies, audio amplifiers, and motor drivers.

Working Principle

The 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor works on the principle of a capacitor that stores electric charge between two electrodes. The electrodes are typically made of an aluminum foil and a layer of activated carbon. They are then separated by an electrolyte, which enables the capacitor to store energy in the form of electrical charge stored between its electrodes. The working voltage of the cap indicates the maximum voltage it can withstand without being damaged.

Capacitance

The capacitance of a capacitor is the amount of electrical charge it can store, usually measured in Farads. The capacitance of a 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is 33uF, or 33 micro-Farads. The capacitance will decrease as the temperature increases, so it is important to take the ambient temperature into account when calculating the necessary capacitance.

Leakage Current

The leakage current of a capacitor is the amount of current that will flow through the capacitor when a voltage difference is applied to its terminals. This current is mainly caused by electrochemical reactions such as oxidation and/or corrosion at the capacitor\'s electrodes. The leakage current of a 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is specified as a maximum of 1.5mA for TA≤ 85°C.

Ripple Current

The ripple current of a capacitor is the maximum alternating current it can handle without being damaged. The ripple current of a 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is specified as a maximum of 3A when the rated voltage ≥ 160V and TA≤ 85°C.

Lifespan/Endurance

The lifespan of a capacitor is determined by its ability to withstand long-term voltage and temperature changes. The estimated life of a 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is 3000hrs min (at rated voltage and 85°C).

Loss Angle

The loss angle, or dielectric loss, of a capacitor is an explicit measure of the capacitors non-ideal characteristics. The loss angle of a 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is specified as a maximum of 0.20 (at rated voltage and 120Hz, TA=20℃).

Conclusion

In conclusion, the 250BXC33MEFCGA12.5X20 aluminum electrolytic capacitor is a versatile component that can be used in a variety of high power circuits. Its relatively low internal resistance and fast charge and discharge rate make it well suited for use in power supplies, audio amplifiers, and motor drivers. Its capacitance, leakage current, ripple current, and life expectancy are all reasonably good, and its loss angle is satisfactory for most applications.

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