T491A225M010AT4380

Lifetime @ Temp.:	2000 Hrs @ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	A
Lead Spacing:	--
Height - Seated (Max):	0.071" (1.80mm)
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)
Package / Case:	1206 (3216 Metric)
Mounting Type:	Surface Mount
Series:	T491
Operating Temperature:	-55°C ~ 125°C
ESR (Equivalent Series Resistance):	7 Ohm
Type:	Molded
Voltage - Rated:	10V
Tolerance:	±20%
Capacitance:	2.2µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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## IntroductionT491A225M010AT4380, commonly known as a Tantalum Capacitor, is a type of electrochemical capacitor that uses tantalum metal and an electrolyte to store energy. In contrast to common capacitors, tantalum capacitors are highly resistant to moisture and can operate in environments with high levels of humidity. The T491A225M010AT4380 capacitor offers several benefits such as high capacitance density, low leakage current, and long life expectancy.## Advantages and Disadvantages of Tantalum CapacitorsTantalum capacitors are a type of electrolytic capacitor driven by tantalum, an electrolyte, and an oxide layer. The electrolyte, which is usually a form of liquid electrolyte, facilitates the flow of electrons on the surface of the tantalum nanoparticles and reacts with the oxide layer to produce strong chemical bonds. The oxide layer, usually formed by anodination, acts as a dielectric material. This technique allows for a high capacitance and very low equivalent series resistance.Tantalum capacitors offer several advantages over other capacitors in terms of power management and reliability. They have superior conductivity, low leakage current, and a wide operating temperature range making them highly suitable for many purposes. Furthermore, their long life expectancy and very low equivalent series resistance make them extremely reliable and an optimal choice for applications such as those found in automotive and medical devices. However, despite their superior characteristics, Tantalum capacitors also have their drawbacks. The most significant of these is their vulnerable cathode, which is prone to failure due to corrosion. Additionally, because they are polarized components, they can be damaged by applying a reverse voltage. Finally, they are expensive, have a lower power storage capacity, and are generally larger in size than many alternate types of capacitors.## Applications of Tantalum CapacitorsThe superior characteristics of Tantalum capacitors make them suitable for use in a wide range of applications. Their low equivalent series resistance makes them an effective choice for power supplies, allowing them to reduce ripple currents and increase efficiency. They are often used in automotive circuitry, making them the perfect choice for ignition circuit protection.Tantalum capacitors are also used in a range of medical applications, where their superior conductivity and reliability are indispensable. They are also used for high-pulse discharge operations, for example, in radio equipment and high-speed photography. Finally, their small size makes them ideal for use in small spaces such as mobile phones and other handheld devices.## Working Principle of Tantalum CapacitorsTantalum capacitors function based on the charging and discharging of electrons. When a voltage is applied to the two terminals, it causes the electrons to move from one electrode to the other through the electrolyte. This charge is stored and releases when the potential difference is reversed, allowing the capacitor to deliver a stable current.The capacitance of a tantalum capacitor is dependant on the size of its active surface, with larger capacitors having greater capacitance. This is due to the number of electrons stored when a voltage is applied to the two terminals, dependent on the amount of active surface area. Additionally, the electrolyte used and type of oxide layer also affect the operating temperature range and the leakage current of the component.## ConclusionT491A225M010AT4380 is a type of Tantalum capacitor offering strong benefits over traditional capacitors due to its low equivalent series resistance, high capacitance density, low leakage current, and long life expectancy. It is suitable for many applications, including automotive circuitry, medical devices, and mobile devices, where its high conductivity and reliability are indispensable. It functions based on the charging and discharging of electrons, with its capacitance dependent on the size of its active surface and the type of electrolyte used.

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