400LSQ3900MEFC77X101

Polarization:	Polar
Package / Case:	Radial, Can - Screw Terminals
Mounting Type:	Chassis Mount
Surface Mount Land Size:	--
Height - Seated (Max):	4.094" (104.00mm)
Size / Dimension:	3.032" Dia (77.00mm)
Lead Spacing:	1.236" (31.40mm)
Ripple Current @ High Frequency:	12.626A @ 10kHz
Ripple Current @ Low Frequency:	10.7A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LSQ
Operating Temperature:	-25°C ~ 85°C
Lifetime @ Temp.:	3000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	3900µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic CapacitorsAluminum electrolytic capacitors are a type of capacitor which utilizes an electrolyte liquid and an aluminum foil to form its polarization layer. Aluminum electrolytic capacitors are widely used in many different electronic applications, from circuit board level capacitors to AC/DC power supplies, DC-to-DC converters, ovens, laser diodes, TVs, computers, mobile phones, and more.The specific model of aluminum electrolytic capacitor discussed in this article is the 400LSQ3900MEFC77X101. This particular capacitor is used in power supplies, DC-to-DC converters, and other similar applications where the load must be switched quickly and precisely for extended periods of time.Application FieldThe 400LSQ3900MEFC77X101 aluminum electrolytic capacitor is ideal for applications where reliability and stability across temperature variations are essential. It is also suitable for switch-mode power supply circuits, DC-DC converters, signal processors, and other circuits that require a high-voltage supply and quick switches. The device has a high dielectric strength and a low leakage current, which ensure that it can withstand sudden voltage changes without failure.Because of its low inductance and high frequency stability, the 400LSQ3900MEFC77X101 is suitable for use in high-frequency circuits. It is also finding use in digital audio systems due to its low self-induction, which ensures excellent bass reproduction even at higher volumes.Working PrincipleThe working principle of the 400LSQ3900MEFC77X101 aluminum electrolytic capacitor is relatively simple. The device is composed of an electrolyte liquid and an aluminum foil which act together as the polarization layer. When a voltage is applied between the two electrodes, electrons from the negative electrode flow to the positive electrode, where they combine with the electrolyte liquid and form an electrochemical reaction. This reaction increases the capacitance of the device significantly, allowing it to store a much larger amount of electrical charge than is possible with a normal capacitor.When the voltage is removed, the electrolyte liquid reforms into its original oxidation state and the capacitor returns to its original capacitance. The aluminum foil acts as the dielectric, or insulating, layer which prevents the device from failing due to excessive voltage.ConclusionThe 400LSQ3900MEFC77X101 aluminum electrolytic capacitor is a reliable and stable device that is well suited to many different applications. It has a high dielectric strength, low leakage current, and low inductance, which makes it suitable for use in switching power supplies, DC-to-DC converters, digital audio systems, signal processors, and more. The aluminum electrolytic capacitor\'s relatively simple working principle also makes it an attractive option for most applications.

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