T491C686M004ZT7280

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):	1.5 Ohm
Type:	Molded
Voltage - Rated:	4V
Tolerance:	±20%
Capacitance:	68µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor. They have an anode made of porous tantalum metal that is covered with an electronic insulating layer, a solid electrolyte whose anions can move within the internal structure, and a cathode made of metal. The electrolyte acts as a conductor and makes the tantalum capacitor larger than other types of capacitors. In comparison, tantalum capacitors have high capacitance, high temperature and stability, high volumetric efficiency, and excellent electronic properties.

T491C686M004ZT7280 Application Field and Working Principle

The T491C686M004ZT7280 is a surface mounted solid tantalum capacitor. It is a small-sized capacitor with an ESR value of 2.2Ω, a Ripple Current of 315mA and a capacitance of 68μF. With a capacitance 6.3 volts DC voltage rating, the T491C686M004ZT7280 is an excellent choice for high density applications such as switch mode power supplies, DC/DC converters and power filters. The T491C686M004ZT7280 works by accumulating electric charge between two plates separated by a dielectric material. This electric field creates a barrier of charge between the two plates. When a potential difference is applied across the plates, the electrons are attracted towards the plate of opposite polarity and discharged when the voltage is removed.When using these capacitors, it is important to note that they can overheat if the current is high enough or if the temperature is too high. Therefore, adequate heat sinks should be used in high temperature and high power applications. It is also important to ensure that the capacitor is connected in the correct polarity as reversing polarity can cause the electrolyte to leak out and permanently damage the capacitor.

Conclusion

The T491C686M004ZT7280 solid tantalum capacitor is an excellent choice for applications where small size, high temperature and stability, high capacitance, and high current rating are required. The capacitor is also relatively easy to use, as it can handle both AC and DC current and must be connected in the correct polarity to prevent electrolyte leakage.

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