T491A685M020AT

Series:	T491
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	6.8µF
Tolerance:	±20%
Voltage - Rated:	20V
Type:	Molded
ESR (Equivalent Series Resistance):	6 Ohm
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	2000 Hrs @ 85°C
Mounting Type:	Surface Mount
Package / Case:	1206 (3216 Metric)
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)
Height - Seated (Max):	0.071" (1.80mm)
Lead Spacing:	--
Manufacturer Size Code:	A
Features:	General Purpose
Failure Rate:	--

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T491A685M020AT is a type of Tantalum Capacitor, which are categorized as electrolytic capacitors. It is constructed of tantalum material, a rare material that is strong and stable, and is used primarily for high-temperature and high-voltage applications.T491A685M020AT capacitors are popular for their small size and low cost, yet still provide high performance. They are used in a wide range of electronic components and devices, from high-power transistors, to heat sinks and resistives. Depending on the application, they can be used as discrete components in a circuit, or safely integrated into the PCB.T491A685M020AT capacitors are often found in medical and avionic equipment, industrial equipment such as motors and pumps, and particularly high-frequency communication systems. They are also widely used in power supplies, voltage regulators, and converter/inverter circuits, as well as ultra-low-frequency oscillators.The working principle of the T491A685M020AT is based on the fact that different materials have different dielectric constants. This dielectric property allows the capacitor to store energy in the form of electric charge. When an electric current is applied to the capacitor, it creates an electrical field, just like a magnet would, and this field helps to hold the charge on the plates.The dielectric material used in the T491A685M020AT capacitor is specially designed to be stable and durable even under extreme environmental conditions. This ensures that the stored energy remains locked up until it is needed.When the capacitor is used in a low-frequency circuit, it is charged and discharged repeatedly, creating a brief pulse as the capacitance drops and rises each time. In such circuits, the capacitor acts like a temporary storage device, allowing the circuit to respond to changing load conditions.In high-frequency circuits, however, the capacitor behaves like an oscillator, providing the electrical pulses needed to maintain proper frequency and phase. This is done by varying the amount of charge stored on the plates, and thus changing the inductance of the capacitor.T491A685M020AT capacitors are highly efficient, reliable, and easy to install, making them ideal for almost any application. However, they can be prone to failure if used improperly, as they are very sensitive to temperature and voltage variations. In addition, their relatively small size means that they require more careful handling than larger electrolytic capacitors.Overall, the T491A685M020AT is a versatile and reliable capacitor that has become an indispensable component in a range of electronic applications. By providing high-performance and stability, it enables electronic systems to operate reliably, even in harsh environmental conditions.

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