381LR681M250J452

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.850" (47.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	3.45A @ 20kHz
Ripple Current @ Low Frequency:	2.42A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	381LR
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	3000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	293 mOhm @ 120Hz
Voltage - Rated:	250V
Tolerance:	±20%
Capacitance:	680µF
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 electronic components used to store electrical energy. They are one of the most widely used types of capacitors in electronic devices due to their high capacity, low cost and long life. They are also known for their low leakage current and small size. The part numbers 381LR681M250J452 are characteristic of aluminum electrolytic capacitors and indicate their physical size and electrical parameters like capacitance and tolerance.

Application Field

Aluminum electrolytic capacitors are used in almost all types of modern electrical applications ranging from cell phones and laptops to medical and automotive systems. They are able to store energy for a wide range of operations from high speed signal processing to voltage doubling, motor control and power factor correction. In addition, they are used for improved power conversion, as blocking capacitors, and as a component of a switched-capacitor filter.One of their greatest advantages is that they can be used in circuits that require high capacitor density, such as notebook computers and PDA\'s, where their small size and low cost make them an ideal choice. Their high capacitance and long life make them popular in power converters, power supplies, military and aerospace systems, telecom systems and other high reliability industrial applications.

Working Principle

An aluminum electrolytic capacitor consists of two electrodes separated by a conductive electrolytic solution. The positive electrode (anode) of an electrolytic capacitor is made from aluminum and includes a thin layer of an electrolyte gel which serves as an ionic bridge between the electrodes. The electrolytic gel is made up of an organic solvent and an electrolyte, along with other additives, such as binders and corrosion inhibitors. A negative electrode (cathode) is then formed by submerging the anode in an electrolytic solution in which positive ions attach to the anode and negatively charged ions form the cathode. When a voltage is applied across the electrodes, the electrons that accumulate on one side travel to the other side, forming an electric field across the aluminum electrolyte. This electric field is what allows an electrolytic capacitor to store electrical energy.

Conclusion

Aluminum electrolytic capacitors are one of the most important components in modern electronics and have been used in almost all types of applications. Their great capacity, high reliability, low cost and small size make them a perfect fit for high density applications. They are also capable of high speed operations and can be used for various purposes, from motor control and power factor correction to more specialized usages like voltage doubling and power conversion.

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