LGU2P391MELA

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.181" (30.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	2.1A @ 50kHz
Ripple Current @ Low Frequency:	1.4A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LGU
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	3000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	220V
Tolerance:	±20%
Capacitance:	390µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum electrolytic capacitors are among the most widely utilized capacitors, but the specific application and working principle of each aluminum electrolytic capacitor are different.LGU2P391MELA is one type of aluminum electrolytic capacitor, which combined with a metal housing of 33.6×19.2mm and an insulated metal tube of 17.9x33.6mm. Herein, this application field and working principle of LGU2P391MELA aluminum electrolytic capacitor will be explored. Application FieldLGU2P391MELA aluminum electrolytic capacitor is applied in many fields such as LED lighting, inverters, converters, audio systems, DC-DC converters, switching supplies or other power equipment. It can also be applied in industrial applications and is suitable for high-frequency high-reserve applications.Working principleAn aluminum electrolytic capacitor is composed of an anode which is an aluminum foil, a separator, an electrolyte and a cathode which is also aluminum foil. The separator can be made of cellulose paper or woven material of high permeability, soaked in electrolyte. A dielectric oxide film is formed on the anode due to electrolysis during the capacitor production process. This film will act as the dielectric layer when assembling, so the inner surface of the capacitor can completely separate the conductive surface of the anode from the conductive surface of the cathode. This is the basis for its high volumetric capacitance.When energized, under the action of electric field, the positive and negative polarized ions in the electrolyte will flow to the corresponding pole, forming a reverse current inside the capacitor. This phenomenon causes charge to accumulate on both sides of the dielectric layer and generate capacitance. In this sense, LGU2P391MELA is different from conventional capacitors since it is used to store electricity rather than block it. ConclusionTo sum up, LGU2P391MELA is an aluminum electrolytic capacitor that can be used in many fields such as LED lighting, inverters, audio systems, DC-DC converters, switching supplies or other power equipment. It works based on the principle of separating two conductive surfaces using a dielectric layer and generating capacitance when being energized.

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