T491A684M020AH4818

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):	12 Ohm
Type:	Molded
Voltage - Rated:	20V
Tolerance:	±20%
Capacitance:	0.68µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum capacitors are electronic components that employ the capacitance of a chemical compound in order to store electrical charge. Larger than most other types of capacitors and having vastly more dielectric strength, these components offer reliable performance in a small package and under high-voltage conditions. The T491A684M020AH4818 is a type of tantalum capacitor with a wide range of applications, which are dependent on its working principle.The T491A684M020AH4818 is a solid-lytic capacitor, which makes it the ideal choice for many applications that require long-term operation at high temperatures. These tantalum capacitors are designed for use in applications where tiny packages, good performance, and low Ohmic values are important considerations.The T491A684M020AH4818 is a polarized device, meaning it stores charge only when the correct positive and negative terminals are connected to the source of power. This is an important characteristic for many applications, as the capacitor can be placed in any orientation, so long as its poles are connected properly. The device also offers excellent stability due to its dielectric strength, allowing applications with high-voltage spikes to operate reliably.In addition to its use in consumer electronics and in the automotive industry, the T491A684M020AH4818 is also used in military and aerospace applications. This is because it offers a unique combination of low leakage current, high capacitance, high breakdown voltage, and very low ESR (Equivalent Series Resistance).The T491A684M020AH4818 works by evenly distributing an electric charge over the surface of an oxide layer formed over a tantalum powder. This oxide layer acts as an insulator, with the electric field causing an outwards expansion known as an anode. This anode is connected to the positive terminal, and the negative terminal is connected to the underlying powder. When a voltage is applied, the electric field is reversed, and electrons flow from the underlying powder to the anode. This flow of electrons is known as the capacitance, and it is this principle that allows the T491A684M020AH4818 to be such a reliable storage device for a variety of different applications.The T491A684M020AH4818 is also notable for its high output current, making it ideal for applications where power is delivered quickly and efficiently. Furthermore, its low ESR means that it can handle high currents without deteriorating the signal, making it a suitable choice for audio applications. Due to its combination of features and its wide range of applications, the T491A684M020AH4818 is considered an essential component in many electrical projects.In short, the T491A684M020AH4818 is a type of tantalum capacitor that offers high capacitance, low ESR, and high output current for various applications. Its working principle is based on the creation of an oxide layer, which is then connected to the positive and negative terminals. This forms a polarized capacitor that is used in consumer electronics, automotive, military, and aerospace applications, due to its combination of reliable performance and small package size. Its excellent capacity for high-voltage spikes also makes it a popular choice for many different projects.

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