T491A474K025ZTPL11

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):	13 Ohm
Type:	Molded
Voltage - Rated:	25V
Tolerance:	±10%
Capacitance:	0.47µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

T491A474K025ZTPL11 is a type of tantalum capacitor. A tantalum capacitor, sometimes referred to as a tantalum electrolytic capacitor, is a type of electrolytic capacitor. It often provides high capacitance per unit volume and low ESR (equivalent series resistance). Generally, a tantalum capacitor consists of a pellet of tantalum metal acting as an anode, covered by an oxide layer that acts as the dielectric, surrounded by a conductive material, commonly manganese dioxide, acting as the cathode.

Applications of Tantalum Capacitors

Tantalum capacitors are used across many industries as an energy storing device for applications requiring high capacitance for its small size. They can also be used for energy filtering, due to their excellent high frequency energy characteristics. Common applications include:

• Signal processing
• Decoupling
• Powering processors
• Power supplies
• Data processing
• Communication systems
• Automotive industries
• Medical equipment

T491A474K025ZTPL11 is specifically used for applications where its high reliability and long life are required. In particular, it is well suited for use in high temperature applications, due to its low leakage current.

Working Principle of Tantalum Capacitors

Tantalum capacitors work on the principles of an electrolytic capacitor, in which a pellet of tantalum (anode) is surrounded by a dielectric layer of tantalum oxide (dielectric) and a manganese dioxide (cathode). When a potential difference is applied across the terminals of the capacitor, a current flows through the electrolyte, which forms a second oxide layer on the surface of the tantalum. This oxide layer acts as the dielectric medium, providing insulation between the anode and the cathode. This layer also serves to trap electric charges, increasing the capacitance of the device.The capacitance of the T491A474K025ZTPL11 is 4.7µF and it has a working voltage of 25V. This gives it a high capacitance in a small package, making it ideal for a wide range of applications. It also has a very low equivalent series resistance (ESR) of 0.3 mΩ. This gives it excellent frequency characteristics and ensures that it can hold its charge over a longer period of time.

Conclusion

T491A474K025ZTPL11 is a type of tantalum capacitor which offers high capacitance and low ESR in a small package. It is suited for a wide range of applications where high reliability and long life are needed, such as signal processing, decoupling, powering processors, power supplies, data processing, communication systems, and more. It works on the principles of an electrolytic capacitor, with a potential difference applied across the terminals forming an oxide layer as the dielectric, which also traps electric charges, increasing the capacitance of the device.

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