LGR2E271MELA30

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.260" (32.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.65A @ 50kHz
Ripple Current @ Low Frequency:	1.1A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LGR
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	10000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	250V
Tolerance:	±20%
Capacitance:	270µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction of Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are one of the most common passive electronic components and are widely used in electrical and electronic industries. They use an aluminum oxide layer on the surface of the aluminum foil as the dielectric material, and use chemical radical electrolyte to provide electrons to the capacitor. Electric connection is through a metal screw and metal terminal connected to the aluminum foil. The size of the aluminum electrolytic capacitor\'s capacity depends on its physical dimensions.

LGR2E271MELA30 Application Field and Working Principle

The LGR2E271MELA30 is an aluminum electrolytic capacitor produced by a company called Nichicon. It is a general purpose capacitor with a capacity of 2.7µF, a rated voltage of 25VDC, a temperature range of -40°C to 105°C, and a rated current of 450mA. This capacitor is most commonly used in order to filter out high frequency noise in audio systems or suppress the start-up inrush current of motors.The working principle of the LGR2E271MELA30 is similar to that of any other aluminum electrolyte capacitor. The core of the capacitor comprises two plates, usually made of aluminum, which are separated by a dielectric insulator layer, usually composed of aluminum oxide. One plate is an anode which is connected to a positive terminal, and the other plate is a cathode to which a negative terminal is connected. On the anode plate, an insulating layer of aluminum oxide is formed by anodic oxidation. Above the oxide layer, an anode foil and its backing paper are attached, which is the part of the capacitor that connects to the positive terminal. A layer of electrolyte is then provided between the oxide layer of the anode and the cathode plates. These electrolytes are typically composed of salts and water, which allows electrical conduction to occur between the plates.When a voltage is applied across the capacitor, electrons are transferred through the electrolyte onto the cathode plate. As more electrons accumulate on this plate, the cathode side of the capacitor becomes more negatively charged, while at the same time, the anode side becomes more positively charged. This creates an electric field between the plates, causing the plates to be attracted to each other. At the same time, the electrons that are transferred onto the cathode plate form a static charge, thus storing energy and creating a charge on the capacitor. Even when no voltage is applied, the plates of the capacitor will still be charged due to the static charge from the electrolyte however, the amount of charge is usually small and diminishes over time until it eventually dissipates. This is why most capacitors require the presence of a voltage to maintain the charge.

Conclusion

The Nichicon LGR2E271MELA30 aluminum electrolytic capacitor is a general-purpose capacitor that has a greater capacity and improved reliability compared to traditional capacitors. It is mostly used to suppress the start-up inrush currents of motors or to filter out high frequency noise in audio systems. The working principle of this capacitor is based on the movement of electrons through the electrolyte and the buildup of an electric field between the anode and the cathode. This electric field stores energy and creates a charge on the capacitor, which can be maintained even when the initial voltage is removed.

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