LPX391M400H5P3

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.378" (35.00mm)
Size / Dimension:	1.378" Dia (35.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	2.16A @ 50kHz
Ripple Current @ Low Frequency:	1.8A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LPX
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	1000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	510 mOhm @ 120Hz
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	390µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic CapacitorsAluminum electrolytic capacitors, also known as aluminum electrolytic capacitor or electrochemical capacitor, are widely used in all areas of electronic engineering. LPX391M400H5P3 aluminum electrolytic capacitors, produced by capacitor manufacturer TDK, have rated working voltage of 63 V DC and capacitance of 4,000 μF. It is one of the highest commonly used aluminum electrolytic capacitors model. This article will explain the LPX391M400H5P3 aluminum electrolytic capacitor\'s application field and working principle. The application field of the LPX391M400H5P3 aluminum electrolytic capacitor mainly includes power supply, automotive electronics, electromechanical and other applications. Generally speaking, it is used to reduce the input AC to DC voltage, reduce the ripple noise level, power filtering, and boost the current when working together with other shielding or small capacitors. A popular example is its application with step-down power supply. With an appropriate step-down transfer, LPX391M400H5P3 aluminum electrolytic capacitors connect with the output terminals of the power supply, accordingly, it is very important to choose the right capacitance and rated voltage. The rated voltage of the electrolytic capacitor should be slightly higher than the output voltage of the power supply.The working principle of the LPX391M400H5P3 aluminum electrolytic capacitor is based on Faraday\'s law of electrolysis. This law states that the amount of material that can be deposited or dissolved in a certain solution in a certain time is proportional to the quantity of electricity that has passed through the solution.The LPX391M400H5P3 aluminum electrolytic capacitor is constructed of an anode and a cathode, with a separator made from paper in between. The anode foil is made of aluminum, coated with an electrolyte-resistant layer. The cathode is a metal oxide layer formed by electrolysis. It acts as a dielectric, with a very thin layer of metal-oxide connected to the anode and cathode poles. The wrapped paper is soaked in an electrolyte solution. When a potential difference is applied across the anode and cathode, a current passes through the electrolyte and, according to Faraday\'s law of electrolysis, deposits metal oxide on the anode, forming an insulating dielectric layer of metal oxide.This capacitor is in an un-polarized configuration, which means it has no polarity and the anode terminal can be connected to either the positive or negative side of the power supply. This makes it an ideal choice for AC applications where the polarity of the input voltage changes.When current flows through the LPX391M400H5P3 aluminum electrolytic capacitor, electrons are transferred from the anode to the cathode through the electrolyte, which in turn causes the capacitor\'s capacitance to increase. This increase in capacitance can lead to the capacitor drawing more current, which can eventually cause it to overheat and become unstable. To avoid this, the LPX391M400H5P3 aluminum electrolytic capacitor should be operated under voltage lower than it\'s rated voltage.In conclusion, the LPX391M400H5P3 aluminum electrolytic capacitor is widely used in automotive electronics, power supplies, electromagnetic and other applications. Its rated working voltage is 63 V DC and capacitance of 4,000μF. Its working principle is based on Faraday\'s law of electrolysis, with an anode foil made of aluminum, coated with an electrolyte-resistant layer, and a separator made of paper soaked in an electrolyte solution. It is un-polarized, which makes it an ideal choice for AC applications where the polarity of the input voltage changes. It should, however, be operated under voltage lower than its rated voltage in order to avoid overheating and becoming unstable.

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