LAR2W221MELC25

Operating Temperature:	-25°C ~ 105°C
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	0.984" (25.00mm)
Size / Dimension:	1.378" Dia (35.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ Low Frequency:	1.05A @ 120Hz
Applications:	General Purpose
Ratings:	--
Polarization:	Polar
Series:	LAR
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	450V
Tolerance:	±20%
Capacitance:	220µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors (LAR2W221MELC25) are widely used in electronics for their relatively large capacitance values and low cost. They are also relatively simple to install and reliable in operation. As components of electronic circuits, aluminum electrolytic capacitors can be used as filter circuits for smoothing out electrical current variations or for adopting the capacitor\'s characteristics to prevent undesired frequencies. The working principle behind the aluminum electrolytic capacitor is based on the use of an electrolyte, usually a conductive liquid or gel, combined with a thin aluminum oxide film. The film acts as the dielectric between the two punched-out metal foils and is etched to form an extremely thin oxide layer with a very high surface area. This oxide layer enables the device to have a high capacitance (typically between 1μF to 1000μF per square centimeter of area). The metal foil itself acts as the anode in the capacitor. The opposite side of the capacitor, the cathode, is often made of a conductive material such as aluminium or tantalum. The metal foil and cathode are separated by the dielectric (the oxide layer), and current is only able to travel through the oxide layer when a voltage is applied across the device. When a voltage is applied, the number of ions in the electrolyte increases, and this movement of ions gives rise to a counter electrode charge on the metal foil. This charge builds up to create a potential difference across the device and ultimately a capacitance.In the LAR2W221MELC25, which falls into the family of aluminum electrolytic capacitors, the two leads are soldered on opposite ends of the capacitor for connection purposes. The anode lead (positive) is connected to the anode metal foil and the cathode lead (negative) is connected to the metal cathode. The geometry of this specific capacitor is a standard pancake and its rated capacitance is 2.2mF. The functionality of aluminum electrolytic capacitors is mainly based on their capacitance values. In general, the capacitance is proportional to the surface area between the two plates (the anode foil and the cathode) divided by the distance between them. This is quite important when designing circuits as it allows for the designer to choose the correct capacitor for the required application. The type of aluminum electrolytic capacitor determines the temperature and humidity ratings under which it can be safely operated. The LAR2W221MELC25 aluminum electrolytic capacitor is specifically designed for very low temperature applications. It features a temperature range of -55°C to 85°C and a very low leakage current. Due to its high reliability, it is most often used in automotive, consumer electronics, and industrial power supply applications, especially in applications where low temperature is of paramount importance. Its low ESR and low ripple currents also make it ideal for a wide range of power supply and filter circuits. In summary, aluminum electrolytic capacitors are versatile and reliable components commonly used in electronic circuits. The LAR2W221MELC25 model is a specifically designed for low temperature applications such as automotive, consumer electronics, and industrial power supply applications. It is relatively simple to install and possesses both high capacitance values and low leakage current. Furthermore, its relatively low cost makes it an attractive option for many designers.

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