672D397H040ET5J

Operating Temperature:	-55°C ~ 105°C
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.417" (36.00mm)
Size / Dimension:	0.630" Dia (16.00mm)
Lead Spacing:	0.295" (7.50mm)
Applications:	General Purpose
Ratings:	--
Polarization:	Polar
Series:	672D
Lifetime @ Temp.:	--
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	40V
Tolerance:	--
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, also known as aluminum electrolytic capacitors due to their construction and components, are one of the most common types of capacitors utilized. Those identified with the code 672D397H040ET5J belong to this type. These capacitors are used to ensure the supply of power to the electrical components being supplied in a device or circuit. Their main components are an aluminum electrode, an electrolyte, and another electrode.

Construction

The aluminum electrolytic capacitors consist of an anode and a cathode. The anode is made from aluminum and is formed into a tightly rolled sheet with a large surface area. The cathode is usually a thin metallic foil. A liquid electrolyte creates a layer between the two which stores electrical charge. An additional capacitance is provided by the thin oxide layer on the surface of the aluminum anode. This is called the double layer capacitance. The capacitor is then sealed inside of a plastic, metal, or paper case. The case must be air tight to prevent oxidation of the electrolyte and protect against dust, oil, and other contaminants.

Application

Aluminum electrolytic capacitors are commonly used in power supplies, rectifiers, motors, pulse circuits, and high frequency power conditioning circuits as well as for energy storage purposes. They are also used in instrumentation, medical equipment, audio systems, and communication systems. In power supplies, aluminum electrolytic capacitors can help to reduce ripple currents. They can also help in the generation of smooth and constant dc output. In power conditioning circuits, aluminum electrolytic capacitors can act as low and high pass filters.

Working Principle

Aluminum electrolytic capacitors work by utilizing the electric double layer effect. When a voltage is applied across the capacitor, the positive charge accumulates on the anode and the negative charge accumulates on the cathode. This creates an electric field between the two electrodes. The electric field produces a potential difference across the anode oxide layer. The electric current flowing between the cathode and anode establishes an electric double layer that is electrochemically adsorbed onto the surface of the oxide layer. This double layer allows for an electrical charge to be stored on the surface of the aluminum anode. Aluminum electrolytic capacitors are highly efficient and reliable due to the double layer capacitance. The life of an aluminum electrolytic capacitor is governed by the thickness of the oxide film which is gradually oxidized due to the action of the electrolyte. This makes them well suited for short-term and high-energy applications.

Conclusion

The 672D397H040ET5J aluminum electrolytic capacitors are widely used in many different electronics applications. They are reliable and efficient due to the double layer effect. The standard construction of these capacitors involve an aluminum anode, a liquid electrolyte, and an electrode. These capacitors can help to reduce ripple currents in power supplies, act as filters in power conditioning circuits, and are used for energy storage. The life of the capacitor depends on the thickness of the oxide film which can be gradually oxidized due to the action of the electrolyte.

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