EKXL401ELL390MJ35S

Ratings:	--
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.457" (37.00mm)
Size / Dimension:	0.394" Dia (10.00mm)
Lead Spacing:	0.197" (5.00mm)
Ripple Current @ High Frequency:	975mA @ 100kHz
Ripple Current @ Low Frequency:	390mA @ 120Hz
Applications:	General Purpose
Series:	KXL
Polarization:	Polar
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	12000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	39µF
Part Status:	Active
Packaging:	Bulk

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are one of the most commonly used types of capacitors for a variety of applications. The type of capacitor is often referred to as “electrolytic” because of the electrolyte-filled body that provides the most important feature of the capacitor, capacitance. The aluminum electrolytic capacitors in question, EKXL401LL390MJ35S, are specially designed to provide superior performance in a variety of applications, including filtering, frequency modulation, and coupling. Here is a deeper look at how these capacitors work and the fields in which they are often used.

Working Principle

The EKXL401LL390MJ35S capacitor works on the same essential principles as other electrolytic capacitors. Inside the capacitor is an cathode and an anode, with an electrolyte (typically an acid) placed between them. The two electrodes and the electrolyte within the capacitor form an “RC” circuit, which passes an electric current through the capacitor. The current creates a buildup of electrons on the anode, which form polarized molecules with the electrolyte. This polarization of the electrolyte creates a capacitance, which is then expressed as a capacitance “rating” (i.e. the EKXL401LL390MJ35S capacitor has a capacitance rating of 390 pF). The electrolyte is chosen to match the specific frequency of operation, so that it is fast enough to operate at high frequencies.

Application Fields

The EKXL401LL390MJ35S capacitor is widely used in a variety of applications. Its superior performance at high frequencies makes it an ideal choice for filtering, frequency modulation, and coupling.

• Filtering: These capacitors are perfect for filtering out certain frequencies. Because they have a very low ESR rating (often in the single digits), they can help filter out low-frequency components in signals, enabling higher-frequency components to be filtered from the audio signal.
• Frequency Modulation: Because these capacitors are fast, they are ideal for changing signal frequencies. This means that they can be used to modulate signals, which can be used to change the frequency of an audio signal, or to create unique synthetic tones.
• Coupling: These capacitors are also often used as passive “coupling” components in DC circuits. By selectively passing AC signals, and blocking DC signals, the capacitor can be used to couple signals together, allowing them to be passed from one point to another, while blocking other signals that should not cross between the two points.

In addition to these applications, aluminum electrolytic capacitors are also often used in power supply filtering, energy storage, and even RF/microwave circuits.

Conclusion

The EKXL401LL390MJ35S aluminum electrolytic capacitor is a specially designed capacitor that is perfect for a variety of applications. Its superior performance at high frequencies, low ESR rating, and the fact that it is fast enough to operate at high frequencies means that it is an ideal choice for filtering, frequency modulation, coupling, and other applications. Its use in a variety of fields makes it an invaluable tool for electric engineers.

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