Polarization:	Polar
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	0.866" (22.00mm)
Size / Dimension:	0.492" Dia (12.50mm)
Lead Spacing:	0.197" (5.00mm)
Ripple Current @ High Frequency:	277.5mA @ 10kHz
Ripple Current @ Low Frequency:	185mA @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	PK
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	2000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	350V
Tolerance:	±20%
Moisture Sensitivity Level (MSL):	--
Capacitance:	22µF
Lead Free Status / RoHS Status:	--
Part Status:	Active

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Aluminum Electrolytic Capacitors

Introduction

Aluminum electrolytic capacitors are extremely common and widely used in a variety of applications due to their low cost and good performance. Due to the nature of their construction, aluminum electrolytic capacitors are often referred to as “wet electrolytic” capacitors. They function using the principle of electrolysis, which is the splitting of water molecules into its component parts of oxygen and hydrogen. This process creates a thin layer of aluminum oxide on the surface of the aluminum plate, which acts as an insulator. The greater the voltage applied to the capacitor, the thicker and more efficient this layer of aluminum oxide becomes.

350PK22MEFC12.5X20 Application Field and Working Principle

The 350PK22MEFC12.5X20 is an aluminum electrolytic capacitor of radial lead type, especially suitable for use in computers, radios, TV, audio, electronic measuring instruments, among others. It is generally used to filter out radio frequency interference from power supplies and also to store energy for the pulse circuits. It is also used in switching power supplies, related pulsed circuits, automated controls, motor drives, and other related fields. The working principle of the 350PK22MEFC12.5X20 is the same as all other aluminum electrolytic capacitors. It consists of two aluminum plates separated by a layer of electrolyte. When a voltage is applied between the plates, the negative charges are attracted to one plate, while the positive charges are attracted to the other plate, creating an electric field. This electric field causes the electrolyte to be ionized, which in turn produces a dielectric layer of aluminum oxide on the surface of the aluminum plates, thus increasing the capacitance of the capacitor. This capacitance determines the reactance of the capacitor, which in turn determines the filtering capabilities of the capacitor.

Conclusion

The 350PK22MEFC12.5X20 is an aluminum electrolytic capacitor of radial lead type, which is used in power supplies, synthesizers, switching power supplies, and many other applications within the electronic circuits. The capacitor works by creating a thin layer of aluminum oxide on the surface of the aluminum plate which acts as an insulator and increases the capacitance of the capacitor. With its good performance and competitive price, the 350PK22MEFC12.5X20 has become a popular choice for many electronics-related applications.

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Part Number	Manufacturer	Price	Quantity	Description