381LX472M080A042

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:	1.378" Dia (35.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	3.8A @ 20kHz
Ripple Current @ Low Frequency:	3.3A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	381LX
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	3000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	80V
Tolerance:	±20%
Capacitance:	4700µF
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 relatively high capacitance density, long life, and low cost. They are typically used in power systems, such as LED drivers, power supplies, and other electronics. All electrolytic capacitors, such as the model 381LX472M080A042, are constructed with two aluminum foil sheets separated by a thin insulating material (often paper) which is soaked in a solution containing positive ions. This solution serves to prevent arcing between the two plates of the capacitor.

Features

Aluminum electrolytic capacitors offer many benefits, including a long service life, a high capacitance density, and a low cost. Other features of aluminum electrolytic capacitors are their relatively low parasitic inductance and series resistance, which allow for faster current pulses. Additionally, aluminum electrolytic capacitors are useful for DC blocking, energy storage, and filtering applications.

Application Field

The 381LX472M080A042 aluminum electrolytic capacitor is most commonly used in the power management of LED drivers. It is also used in voltages regulation to smooth the power supply output, as well as in power factor correction circuits. The electrolytic capacitor is also used as a bypass capacitor to protect electronic components from high frequencies and transient voltage spikes.

Working Principle

An aluminum electrolytic capacitor consists of two thin aluminum foils as the plates, with a very thin layer of oxide as the dielectric between the plates. The aluminum foils are soaked in an electrolyte solution containing positive ions, which act as a conductor between the plates. When the capacitor is subjected to an electrical field, the positively charged ions pass through the dielectric and are attracted to the negative pole. This causes a build-up of negative charges on the negative plate and positive charges on the positive plate, creating an opposite electric field that wards off any other external electric fields. This process is known as dielectric polarization, and it allows the capacitor to store an electrical charge. When a voltage is applied across the terminals of the capacitor, there will be current conduction, starting from the negative plate, passing through the dielectric, and arriving at the positive plate, where the positive ions will be discharged. This conduction allows electrical current to flow through the capacitor, and this current is known as capacitance current.

Summary

The 381LX472M080A042 aluminum electrolytic capacitor is an example of an electrolytic capacitor that is used in the power management of LED drivers, as well as other electronic circuits. It has a long service life, a high capacitance density, and a low cost. The working principle of aluminum electrolytic capacitors is based on dielectric polarization, and the current conduction is known as capacitance current.

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