ALF40G391EE400

Ratings:	--
Package / Case:	Radial, Can - Snap-In - 5 Lead
Mounting Type:	Through Hole, Press-Fit
Surface Mount Land Size:	--
Height - Seated (Max):	1.850" (47.00mm)
Size / Dimension:	1.575" Dia (40.00mm)
Lead Spacing:	0.984" (25.00mm)
Impedance:	182 mOhms
Ripple Current @ High Frequency:	6.48A @ 10kHz
Ripple Current @ Low Frequency:	2.88A @ 100Hz
Applications:	General Purpose
Series:	ALF40
Polarization:	Polar
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	5000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	295 mOhm @ 100Hz
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	390µF
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors & ALF40G391EE400 Application Field and Working Principle

Aluminum electrolytic capacitors are one of the most commonly used types of capacitors in electronics assemblies. Their popularity lies in their low cost, their high capacitance values, high operating temperature ratings, and their excellent electrical breakdown ratings. They are also known as “aluminum can” capacitors due to their cylindrical metal cases.The ALF40G391EE400 is an aluminum electrolytic capacitor. It is typically used in audio, video, and power supply applications due to its high capacitance and stable performance. It is also available in a wide range of capacitance values.In order to understand how aluminum electrolytic capacitors work, it is important to understand the basic principles of capacitance. Capacitance is the ability of an electrical component to store and release energy. An electrical capacitor is composed of two metal plates separated by an insulating material or “dielectric”. A voltage applied across the plates creates an electric field which induces a charge on each plate.The capacitor then stores the charge in the form of an electric field. As the voltage across the plates changes, the charge on the plates changes accordingly. This is how capacitors store and release energy.The ALF40G391EE400 is an aluminum electrolytic capacitor. This type of capacitor is manufactured from two metal plates that are separated by an electrolyte material. The plates are typically made of aluminum and the electrolyte is typically an organic polymer. The polymer acts as the “dielectric” which allows for the creation of an electric field between the two plates. When a voltage is applied across the two plates, an electric field is created between the plates which causes a charge to be stored on each plate. This charge is stored until the capacitor is discharged. This is how aluminum electrolytic capacitors are able to store and release energy efficiently.The ALF40G391EE400 aluminum electrolytic capacitor has a wide range of applications in the audio, video, and power supply fields. Its ability to store and release energy make it ideal for use in these types of applications. Additionally, its temperature rated of up to 105°C allows it to be used in areas where higher temperature ratings are required.In summary, the ALF40G391EE400 aluminum electrolytic capacitor is a popular choice for audio, video, and power supply applications due to its stability, performance, and wide range of capacitance values. Its ability to store and release energy efficiently makes it an ideal choice for many electronic assemblies. Understanding the basics of capacitor theory and how aluminum electrolytic capacitors work is essential to selecting and using the right capacitor for your application.

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