T491A475M025AT 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):	6 Ohm
Type:	Molded
Voltage - Rated:	25V
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, also commonly referred to as "tantalums", are solid-state electrolytic capacitors that are frequently used in the majority of consumer electronics products, from digital watches to PCs. As the name "tantalum" implies, these capacitors are based on the concept of utilizing a metallic oxide (in this case Tantalum pentoxide) to achieve the desired value of capacitance. The T491A475M025AT is a type of tantalum capacitor that is commonly used in computer motherboards, laptops, and embedded electronic circuits as it has a proven track record of low ESR (Equivalent Series Resistance) and a wide temperature range.In order to understand the working principle of a T491A475M025AT, it is important to understand the construction of a typical tantalum capacitor. A tantalum capacitor is constructed in a manner similar to that of an electrolytic capacitor. It includes two electrodes, an anode and a cathode, which are typically made of tantalum and surrounded by a solid electrolyte. In between the two electrodes is a dielectric which acts as an insulator. The two electrodes are also usually separated by a protective outer casing.The critical feature of the T491A475M025AT is the anode. As opposed to ceramic and plastic capacitors, it is made from sintered tantalum powder which forms an extremely porous surface. The pores of the anode allow for small amounts of electrolyte, such as liquid electrolyte or solid electrolyte gel to enter and form a conductive layer between the two electrodes. As voltage is applied across the capacitors, a current flows through the outer casing, then through the electrolyte, and finally, through the anode and cathode which results in a capacitive effect.When it comes to applications, the T491A475M025AT is specifically designed for applications that require a large amount of capacitance in a small yet reliable package. Due to its miniature size, it\'s one of the most popular capacitors for use in laptops and embedded electronic circuits. The T491A475M025AT is also known for its low ESR and its ability to operate across a wide temperature range, from -55°C to 125°C. Additionally, since the tantalum core provides an extremely high capacitance per unit volume, it is also an excellent choice when it comes to high-density circuit boards.Overall, the T491A475M025AT is an excellent choice for a variety of applications. Its miniature size and the ability to operate in extreme temperatures make it an ideal choice for use in computers, laptops, and embedded electronic circuits. The highly porous anode also allows for the use of liquid electrolyte or solid electrolyte gel between the two electrodes. This combination of features and qualities make the T491A475M025AT an exceptional and reliable choice as a capacitor.

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