T491C475M020AT4280

Lifetime @ Temp.:	2000 Hrs @ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	C
Lead Spacing:	--
Height - Seated (Max):	0.110" (2.80mm)
Size / Dimension:	0.236" L x 0.126" W (6.00mm x 3.20mm)
Package / Case:	2312 (6032 Metric)
Mounting Type:	Surface Mount
Series:	T491
Operating Temperature:	-55°C ~ 125°C
ESR (Equivalent Series Resistance):	2.4 Ohm
Type:	Molded
Voltage - Rated:	20V
Tolerance:	±20%
Capacitance:	4.7µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

T491C475M020AT4280 is a product from the tantalum capacitor family. Tantalum capacitors are used in a variety of applications and are becoming increasingly popular due to their high reliability, small size and low leakage current. The technology offers a wide range of uses in many industries, from consumer electronics to medical devices. The following is a look at the application field and working principle of the T491C475M020AT4280 tantalum capacitor.

Application Field

Tantalum capacitors are often used in power supplies, audio electronics, digital cameras and other consumer electronics. The T491C475M020AT4280 is designed to be a high voltage, low leakage rate capacitor. Its low ESR makes it ideal for use in power converters, such as those found in laptop and desktop computers. Its high voltage rating makes it suitable for use in other high voltage applications. It is also used in automotive, UPS systems, LED lighting and various instrumentation applications.

Working Principle

The working principle of a tantalum capacitor is similar to that of an electrolytic capacitor. These capacitors are made from a sintered anode of tantalum, which is immersed in an electrolytic solution. This electrolyte is a mixture of a salt, such as ammonium pentaborate, and a solvent. A small amount of current flows between the anode and the electrolyte, which causes a charge to form and maintain on the anode surface. This charge can then be used to store energy.

Types

Tantalum capacitors are available in two different types: solid and wet. The solid type is more common and consists of a solid anode and a porous dielectric material. This type has a low ESR and is suitable for use in high frequency applications. The wet type is composed of a liquid electrolyte and has a higher ESR. It is mainly used in low frequency or DC applications.

Advantages

The main advantages of using tantalum capacitors include their small size, high capacitance, and low leakage current. These qualities make them an ideal choice for applications where space is at a premium and high reliability is needed. The low ESR of the solid type also makes them suitable for use in high frequency applications. Additionally, tantamounts have a wide temperature range, making them suitable for a variety of environments.

Disadvantages

The main disadvantage of using tantalum capacitors is their high cost. These capacitors are generally more expensive than other types of capacitors. Another issue to consider is the environmental impacts associated with the mining and manufacture of tantalum. The mining of tantalum and the manufacturing processes used to create the capacitors can cause environmental damage.

Conclusion

T491C475M020AT4280 is a high voltage, low leakage rate tantalum capacitor that is used for a variety of applications, from power supplies to audio electronics. Its small size, high capacitance and low ESR make it an ideal choice for applications where space is at a premium and high reliability is needed. While these capacitors are more expensive than other types, their performance and reliability make them well worth the cost.

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