T491A475M006AT Capacitors

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	--
Features:	General Purpose
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
Lifetime @ Temp.:	2000 Hrs @ 85°C
Series:	T491
ESR (Equivalent Series Resistance):	5.5 Ohm
Type:	Molded
Voltage - Rated:	6.3V
Tolerance:	±20%
Capacitance:	4.7µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

T491A475M006AT capacitors are one of the most popular of all tantalum capacitors available today. They are used in a variety of applications, from providing high-performance, low ESR power supply filtering to decoupling applications on power modules. In addition, they are also well employed in military applications and other high-reliability environments where a long life span is paramount.Tantalum capacitors are a type of electrolytic capacitor, which utilize the property of electrochemical double-layer capacitance in order to achieve higher levels of energy storage efficiency than traditional aluminum electrolytic capacitors. This is achieved by using a tantalum anode and cathode material which is dipped into a solution of electrolyte, usually an acidic solution such as sulfuric acid. The capacitance value of a tantalum capacitor depends on its size, the dielectric material and the type of electrolyte used. The T491A475M006AT is a polarized, 25V rated, 4.7 μF capacitor with a 5.6mm diameter. It has a rated temperature range of – 55°C to +105°C, and is categorized as an “A”-grade capacitor, meaning it has a rather high tolerance and stability across temperature, voltage, and frequency. These capacitors are available from various distributors, and are typically rated to have a maximum million-hour ESR decrement of 1.0, with a maximum current ripple of 4.7 milliamps. Tantalum capacitors like the T491A475M006AT are generally used for power supply filtering in mobile electronics, automotive, industrial or any applications that require ripple filtering or decoupling. They offer an extremely high capacitance-to-volume ratio, which makes them ideal for high-density applications.In addition to the high capacitance, tantalum capacitors have a wide variety of working principles. One of the most common and effective among them is known in the industry as the “modeling” principle. This involves a series of capacitors connected in parallel, which are able to “model” the behavior of an ideal capacitor. This means that the circuit’s efficiency is increased and its power dissipated reduced when compared to a single capacitor. The T491A475M006AT is well-suited to benefit from this principle and is capable of effectively providing ripple filtering or decoupling to power modules. Besides ripple filtering, another common application of the T491A475M006AT is for coupling and decoupling applications. As the name implies, combining and decoupling are used to couple and isolate AC signals from DC signals, respectively. This is typically done for noise reduction or to protect the circuit from voltage surges or drops. Coupling applications utilize a series of capacitors in order to maximize the coupling efficiency and prevent undesired leakage, while decoupling applications require a single capacitor with a relatively high capacitance which is able to handle a range of varying currents. The T491A475M006AT is well suited for both coupling and decoupling applications. Finally, the T491A475M006AT has been designed to be able to handle conditions where an extremely long life span is required. This makes it not only well suited for applications such as filtration or coupling/decoupling, but also for military applications or any other high-reliability environment. In conclusion, the T491A475M006AT has a wide range of application fields, due to its high capacitance-to-volume ratio and its ability to perform a variety of working principles. It is an extremely reliable and versatile component, making it an ideal choice for many applications. It offers excellent ripple filtering and decoupling capabilities, and its long life span makes it suitable for many high-reliability applications.

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