Lifetime @ Temp.:	2000 Hrs @ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	B
Lead Spacing:	--
Height - Seated (Max):	0.083" (2.10mm)
Size / Dimension:	0.138" L x 0.110" W (3.50mm x 2.80mm)
Package / Case:	1411 (3528 Metric)
Mounting Type:	Surface Mount
Series:	T491
Operating Temperature:	-55°C ~ 125°C
ESR (Equivalent Series Resistance):	2 Ohm
Type:	Molded
Voltage - Rated:	20V
Tolerance:	±10%
Capacitance:	6.8µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

Introduction

Tantalum Capacitors are frequently used in electronics and microelectronic systems due to their small size, high capacitance, and relatively low cost. They are typically used to store energy for use in power supplies and in systems with high ripple current requirements. These capacitors can be made from various dielectric materials including tantalum, ceramic, and electrolytic. The type of capacitor used should be selected based on the specific application needs. T491B685K020AH2478 is one such type of capacitor and this article will discuss its application fields and working principle.

Application Fields

T491B685K020AH2478 is an axial lead tantalum capacitor used in a wide range of electronic devices and systems. These devices are well suited for applications requiring high ripple current, low equivalent series resistance (ESR), and good frequency response. Commonly encountered applications include timing circuits, switching power supplies, and AC-DC converters.T491B685K020AH2478 devices are also suitable for use on portable or battery-powered equipment. This is because they tend to consume very low power when compared to traditional electrolytic capacitors. As such, they can be used in battery-powered applications that demand low total power consumption. Similarly, their high capacitance also makes them a good choice for portable applications such as laptop computers, tablets, and smartphones.

Working Principle

The working principle of T491B685K020AH2478 is quite simple. When voltage is applied across the capacitor plates, a current of electrons start flowing through the capacitor. As the electrons accumulate on the plates, a store of charge is developed. This charge can then be released on demand.This process is similar to that of a battery, but with a shorter life cycle. Capacitors are designed to hold charge for only a brief period of time before needing to be recharged. They are also typically not designed to deliver power for very long periods of time, as the stored energy is limited.

Conclusion

In conclusion, T491B685K020AH2478 is an axial lead tantalum capacitor used for a wide range of electronic and portable applications. Its main features include low power consumption, high ripple current, and a good frequency response. Its working principle is based on the same principles as a battery, but with shorter life cycle and limited stored energy.

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