LAR2W271MELC30

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Aluminum electrolytic capacitors are essential components in electronic circuits, with both positive and negative electrodes made of aluminum foil. They are widely used in consumer electronics, automotive electronics, and precision electronic equipment due to their high stability, long life and low cost. LAR2W271MELC30 is one type of aluminum electrolytic capacitor manufactured by Taiyo Yuden. This type of capacitor is widely used in consumer electronics and automotive electronics.

LAR2W271MELC30 is an axial type aluminum electrolytic capacitor with an operating temperature range of -25°C to 85°C. It has a capacitance rating of 270µF and a maximum ESR of 4.5 ohms and voltage rating of 25V. The maximum ripple current is 30% of the capacitance at 25°C, and the product has a life expectancy of 3000 hours when used in the rated temperature range.

Application Fields

Due to its high capacitance and low ESR, LAR2W271MELC30 can be used in electrical circuits where high capacitance is required. It is mainly used in automotive electronics, such as in clock circuits and antilock braking systems, and in consumer electronics including televisions and audio equipment. It can also be used in high-temperature thermal prorogation compensated circuits, pulse power circuits of microwave ovens and cell phones, and in SMPS circuits of PCs and notebooks.

Working Principle

An aluminum electrolytic capacitor consists of a metalized paper or film, an electrolyte and two electrodes. The metalized paper or film acts as the dielectric and is impregnated with the electrolyte and wound into a roll. The electrodes are then foil-wrapped around this roll and soldered to terminal pins. The two electrodes are made of aluminum foil, and the electrolyte forms a layer between them.

When a voltage is applied between the two electrodes, the electrolyte forms an electric double layer at the interface between the two planes. This layer is created by the movement of ions, which act as conductors of electric current. The formation of the electric double layer leads to a decrease in the effective capacitance of the capacitor. As the voltage increases, the capacitance continues to decrease until it reaches a minimum value known as the "lower capacitance limit".

At the same time, the resistance of the electrolyte increases with increasing voltage. This is due to the increased polarizability of the electrolyte and the higher frequency components of current being blocked by the double layer capacitance. This increase in resistance leads to a decrease in the effective ripple current of the capacitor, and thus a lower ESR value.

The LAR2W271MELC30 has a low ESR value of 4.5 ohms, which allows it to handle higher current without the risk of overheating. It also has a high capacitance rating of 270µF, which is ideal for applications that require high-frequency signal transmission or power supply with low power consumption. Overall, this makes the LAR2W271MELC30 an ideal choice for a wide range of applications.

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