LGL2G391MELA40

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.654" (42.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.7589A @ 50kHz
Ripple Current @ Low Frequency:	1.23A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LGL
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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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used due to their ability to store energy in a relatively small physical space. The capacitors contain a limited amount of energy, but can release it in a very high amount and for a relatively short time. This makes them ideal for use in high-power applications such as motor controllers, power supplies, and inverters. The aluminum electrolytic capacitor is composed of two pieces of aluminum foil and a thin plastic sheet, impregnated with an electrolyte solution. The two aluminum foils are sandwiched between the plastic sheet and an outer, solid casing.The LGL2G391MELA40 capacitor is a radial, aluminum electrolytic capacitor with a rated voltage of 6.3 volts, a maximum operating temperature of 105°C, and a rated capacitance of 680uF. It is typically used in applications such as DC-DC converters, inverters, motor controllers, power supplies, power amplifiers, and audio equipment.The working principle of aluminum electrolytic capacitors is based on Faraday\'s law. This states that when an electric current passes through a capacitor, a net electrostatic field is developed between two oppositely charged conductive plates. If the charge on the two plates is balanced so that the total charge is zero, there will be no electric field. However, if the charge on one plate is larger than that on the other, a measurable electric field results. The electric current in an aluminum electrolytic capacitor takes the form of a Faraday loop, with electrons moving charge from one plate to the other and the external electric field maintaining the imbalance.The charge stored in an aluminum electrolytic capacitor is determined by the amount of electrons that are moved between the two plates. This is referred to as the charge capacity of the capacitor, and it is determined by the product of the Faraday constant and the capacitance of the capacitor. The Faraday constant is a physical constant that is the ratio between the charge of an electron and the size of its electric charge. The capacitance of the capacitor is determined by the area of its plates, the distance between them, and the dielectric constant of the material between them. As such, the larger the area of the plate and the closer the distance between the plates, the greater the capacitance, and thus the greater the charge capacity.In applications where energy needs to be quickly released, such as motor controllers, power supplies, and inverters, aluminum electrolytic capacitors are the ideal choice as they are capable of quickly releasing stored energy on demand. Furthermore, aluminum electrolytic capacitors are relatively small in size and easy to mount to a printed circuit board. This makes them highly suitable for use in many high-power applications.

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