381LX221M315J032

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.457" (37.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.4A @ 20kHz
Ripple Current @ Low Frequency:	1A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	381LX
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	3000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	315V
Tolerance:	±20%
Capacitance:	220µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors offer a powerful avenue for storing electrical current due to their high capacitance values and long shelf life. Whether deployed in industrial automation processes or used for a wide variety of electronics projects, capacitors can play a vital role in any task or system of large-scale electrical engineering. The three-digit code combination on the base of the capacitor’s casing is used to assign distinct properties to each capacitor type, such as the capacitance value, rated voltage, and temperature. For example, the code combination of 381LX221M315J032 denotes a device with a rated capacitance of 381μF, rated voltage of 500VAC, temperature range of -25 to +105°C, and an electrolyte composed of polyethylene terephthalate film.

Wide Range of Applications

Aluminum electrolytic capacitors have a broad range of applications due to their robust construction and excellent performance. These capacitors are commonly used in industrial equipment, signal filters, power electronics, motor controllers, and any other system where a high capacitance value is necessary. Some of the applications also include sound systems, medical or aerospace equipment, lighting, and outdoor appliances. In industrial automation processes, aluminum electrolytic capacitors can be used as a backup power supply in case of a sudden surge or breakdown. These capacitors can provide emergency power until a permanent solution is provided. Furthermore, these capacitors are used for power factor correction and in switch-mode power supplies, specifically to store energy during the intermediate switching cycles of the converter. Aluminum electrolytic capacitors offer an attractive option for both DC and AC circuits as they are able to maintain their energy storage capacity for relatively long periods of time.

Working Principle

Aluminum electrolytic capacitors work by using two parallel plates of aluminum oxide sandwiched between two pieces of aluminum foil. The aluminum foil and the internal electrolyte react with the electrochemically grown oxide layer, forming an electrical capacitor. The capacitor is then able to store electrical charge for a period of time. As an electrolyte, these capacitors use an organic salt solution, such as benzyl alcohol, to help keep the electrolyte stable and provide an electrically-conductive medium for ionization. This solution also prevents the growth and oxidation of the aluminum foil and electrolyte, helping to extend the shelf life of the device. Another factor that affects the performance of these capacitors is their temperature range. When aluminum electrolytic capacitors are exposed to high temperatures, the electrolyte evaporates, leaving the oxide layer exposed and creating a path for electrical shorts. To counter this, the device is usually equipped with a temperature protection device to detect an abnormally high temperature and cut off the current before damage occurs.

Conclusion

Aluminum electrolytic capacitors are a reliable and effective means for storing electrical current for a variety of applications. From industrial equipment to medical devices, these capacitors offer a wide range of features and performance characteristics. Offering a range of options based on the capacitance value, voltage, and temperature-resistance, these capacitors can be tailored to suit any user’s needs.

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