ALF20C122ED200

Ratings:	--
Package / Case:	Radial, Can - Snap-In - 4 Lead
Mounting Type:	Through Hole, Press-Fit
Surface Mount Land Size:	--
Height - Seated (Max):	1.654" (42.00mm)
Size / Dimension:	1.575" Dia (40.00mm)
Lead Spacing:	0.886" (22.50mm)
Impedance:	99 mOhms
Ripple Current @ High Frequency:	4.69A @ 10kHz
Ripple Current @ Low Frequency:	4.02A @ 100Hz
Applications:	General Purpose
Series:	ALF20
Polarization:	Polar
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	2000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	124 mOhm @ 100Hz
Voltage - Rated:	200V
Tolerance:	±20%
Capacitance:	1200µF
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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ALF20C122ED200 Application Field and Working Principle of Aluminum Electrolytic Capacitors

Aluminum Electrolytic Capacitors (AECs) are common passive components used in diverse electronic applications and products. These capacitors provide a variety of functions, including buffering alternating current signals, storing tremendous amounts of energy, and blocking or controlling frequency signals.ALF20C122ED200 is a type of AECs and the following parts will discuss its application field and working principle.

Application Field of ALF20C122ED200

AECs are widely used in all types of electronic products and applications. ALF20C122ED200 is mainly used in DC-DC converters, an approach for converting DC input voltage into another DC output voltage, usually used in power supply circuits. Moreover, it is also used in liquid crystal display (LCD) TVs, laptop devices, refrigerators, automobiles, and many other consumer electronic products.

Working Principle of ALF20C122ED200

Overall, ALF20C122ED200 is made of two separate aluminum layers. The two aluminum layers are connected by a conductive oxide layer and separated by an electrolyte solution. AECs require a relatively large electric current to reach their maximum capacitance and the current is provided by the nature of the capacitors itself. The two aluminum layers in the capacitor are arranged to serve as two electrodes. These two electrodes are then placed in a series with the electrolyte solution in between.When DC power is applied to the capacitor, the anode of the capacitor begins to accumulate positive charges until it reaches maximum capacitance. Then, an electrolyte solution reacts with the anode and begins to transport negative ions which removes the excess charge on the anode. This is known as a Faradaic reaction, and it helps to maintain maximum capacitance while providing an additional electric current to the capacitor.At the same time, the cathode of the capacitor also accumulates negative charges from the electrolyte. These negative charges are then transported back to the anode by the electrolyte solution. This process helps to cycle the charges between the two electrodes, and it helps to maintain constant capacitance levels in the capacitor.In conclusion, ALF20C122ED200 is a type of aluminum electrolytic capacitors which can be widely used in DC-DC converters, LCD TVs, laptops, motor vehicles, and many other electronic products. Its working principle is based on two aluminum plates connected with a conductive oxide layer, which is then separated by an electrolyte solution. This helps to store electrical energy, buffer AC signals, and provide additional current when needed.

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