EET-HC2W391DA

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	2.047" (52.00mm)
Size / Dimension:	1.181" Dia (30.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	2.17A @ 10kHz
Ripple Current @ Low Frequency:	1.55A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	TS-HC
Operating Temperature:	-25°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	468 mOhm @ 120Hz
Voltage - Rated:	450V
Tolerance:	±20%
Capacitance:	390µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors are applied in various fields and have various working principles. They are currently used in the fields of automotive, consumer electronics, industrial, aerospace and medical. EET-HC2W391DA is an electrolytic capacitor, which has particularly good high-temperature characteristics. It is composed of an oxide film formed on an aluminum foil and a wound aluminum wire. The oxide film is a dielectric material, and the outer shell is an electrolyte that serves as an anode. The electrolyte interacts with the aluminum foil to form a capacitor.The working principle of EET-HC2W391DA lies in the fact that when a voltage is applied between the aluminum and electrolyte, an electric field is produced, which separates the positive and negative charges. The positive charges are attracted to the electrolyte, and the negative charges are attracted to the aluminum foil. This creates a depletion layer between the two electrodes. As current flows and charges accumulate in the depletion layer, the electric field increases, causing the energy to be stored in the capacitor.The working principle also explains why aluminum electrolytic capacitors are characterized by their large capacitance values. When the electric field is produced and applied, the electric charge which is highly concentrated inside the capacitor creates an effective capacitance in the form of a depleted layer between the two electrodes. This capacitance increases with increasing voltage and decreases with decreasing voltage, which is why the capacitance values of aluminum electrolytic capacitors are typically larger than those of other capacitors.Once charged, the electric field between the two electrodes causes the charges to accumulate, creating a potential difference between the electrodes. This potential difference is maintained even after the current flow has ceased, and can remain the same over time. This is the basis of the charge storage capacity of aluminum electrolytic capacitors, which is commonly expressed in microfarads or pico farads.One of the unique characteristics of aluminum electrolytic capacitors is their ac impedance. The electric field between the two electrodes causes the electric charges to accumulate at an ac signal frequency, forming a circuit that offers an impedance that is much higher than that of other types of capacitors. This helps minimize signal interference, as the higher impedance of aluminum electrolytic capacitors acts as a filter, blocking any signal that is not of the specified frequency.In summary, EET-HC2W391DA is an aluminum electrolytic capacitor with high temperature characteristics and a working principle that involves producing an electric field between the two electrodes to create a charge storage capacity and to minimize signal interference. It is used in a variety of applications ranging from automotive, consumer electronics, industrial, aerospace, and medical fields.

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