MAL202134102E3

Polarization:	Polar
Package / Case:	Axial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	--
Size / Dimension:	0.394" Dia x 0.709" L (10.00mm x 18.00mm)
Lead Spacing:	--
Impedance:	200 mOhms
Ripple Current @ High Frequency:	660mA @ 10kHz
Applications:	General Purpose
Ratings:	--
Series:	021 ASM
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	2500 Hrs @ 85°C
ESR (Equivalent Series Resistance):	320 mOhm
Voltage - Rated:	10V
Tolerance:	±20%
Capacitance:	1000µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Aluminum Electrolytic Capacitors: MAL202134102E3 application field and working principle

Aluminum electrolytic capacitors use an oxide film formed on the surface of the anode foil as the dielectric medium and use metal aluminum as the anode material. MAL202134102E3 is a kind of aluminum electrolytic capacitors and its application field and working principle are described in this article.

Application Field

MAL202134102E3 aluminum electrolytic capacitors are mainly used in digital products as filter capacitor, such as laptop computer, desktop computer, digital camera, power adapter, etc. It can also be used in analog products, such as transistor radio, audio lifier and so on.

Working Principle

MAL202134102E3 aluminum electrolytic capacitors use electrolyte as the medium, and aluminum as the anode material, an oxide film is formed on the surface as the dielectric medium.The oxide film is formed by anodizing, and after anode process, a thicker oxide film forms on the surface that can withstand higher Voltages and store more energy compare to regular aluminum. Inside of the capacitor is a very thin material to keep fluids sealed, it prevent vapor and liquid leaking, so the capacitor can perform normally.When the voltage is applied to the aluminum electrolytic capacitor, electron and positive ions move in the electrolyte, positive ions (H+, Al and other positive ions) move toward the aluminum foil, while electron (e-) are diverted through the external circuit, once they reach the aluminum foil, they bind with the cations to form aluminum oxide that is fixed on the surface of aluminum. The large surface area of the aluminum foil and the few barriers between the electrolyte and the oxide film can ensure sufficient charge can be circulated and it also helps to reduce the outer resistance of the capacitor. When no voltage is applied, the oxide film formed by anodizing can isolate the aluminum surface and electrolytic solution, so the capacitor will not release stored charges. The ability to maintain the stored charge is highly depended on the thickness and quality of the oxide film. Generally speaking, the thicker the oxide film and the higher the purity of the aluminum foil which are used to make the capacitor, the better the quality and longer lifetime of the capacitor.

Conclusion

To sum up, MAL202134102E3 aluminum electrolytic capacitor is mainly used in digital products such as laptop computer, desktop computer, digital camera, power adapter, transistor radio and audio lifier, etc. It relys on the electrolyte, aluminum foil and the formed oxide film for its working principle. The thicker the oxide film and the higher the purity of the aluminum foil, the better the quality and longer lifetime of the capacitor.

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