LAR2G391MELA50

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.969" (50.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.7825A @ 50kHz
Ripple Current @ Low Frequency:	1.55A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LAR
Operating Temperature:	-25°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	390µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are one of the most common type of capacitor used in electronic circuits. They are the most cost effective type of capacitor available for many applications. These aluminum electrolytic capacitors are constructed from an aluminum foil with an oxide layer on one side and a conducting electrolyte on the other. A dielectric paper acts as a separator between the two. When voltage is applied, the electric field generated polarized the oxide layer creating an electric double layer that allowed the capacitor to store electrical energy.

LAR2G391MELA50

The LAR2G391MELA50 is an Aluminum Electrolytic Capacitor from LG Chem. It has a nominal voltage of 6.3V, and a DC current rating of 5.5mA. The capacitor has a tolerance of ±20%, and its lead pitch is 5.08mm. It also comes with a longer lead length than traditional electrolytic capacitors, making it ideal for applications with limited space.

Application Field and Working Principle

Aluminum electrolytic capacitors have a wide range of applications. The LAR2G391MELA50 specifically is suitable for use in high frequency circuits, voltage regulators, filters, power supplies, and DC-DC converters, as well as for energy storage and filtering effects. The working principle of the LAR2G391MELA50 depends on its construction. The aluminum foil serves as the conducting anode, the dielectric paper acts as the separator while the electrolyte is the conducting cathode. When voltage is applied, an electric field is created, which polarizes the oxide layer and creates an electric double layer. This double layer serves as the capacitor\'s dielectric and allows it to store electrical energy. When the voltage is removed, the charge will be released, and the capacitor will have discharged.

Conclusion

Aluminum electrolytic capacitors, like the LAR2G391MELA50, are essential components in electronic circuits. They are ideal for applications such as high frequency circuits, voltage regulators, filters, power supplies, and DC-DC converters. Their working principle relies on the electric field that polarizes the oxide layer and creates an electric double layer which allows the capacitor to store energy.

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