T491B684M035ZT

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):	6.5 Ohm
Type:	Molded
Voltage - Rated:	35V
Tolerance:	±20%
Capacitance:	0.68µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors: T491B684M035ZT Application Field and Working Principle

Tantalum capacitors are electrochemical capacitors that typically use an oxide of some form of tantalum as the cathode. They are used in various types of electronic circuitry and technology, ranging from industrial to consumer products. This article will focus on the application field and working principle of Tantalum capacitors with the T491B684M035ZT as an example. The T491B684M035ZT is a general purpose, solid taplate, Tantalum polymer capacitor with a solid, self-healing film dielectric. It is non-polarized and does not produce audible noise. The capacitor is generally used in the areas of power management, portable electronics, digital signal processing and telecommunications, among others. The application field of Tantalum capacitors with the T491B684M035ZT in particular is broad and covers many industries, including military and aerospace projects, mobile communications and terminals, automotive, lighting systems, power supply design, security systems and smart home appliances. The capacitor is suitable for both high frequency and low frequency applications, either as a voltage filter or for energy storage. The working principle of a Tantalum capacitor is relatively straightforward. Its construction consists of a tantalum anode and a cathode made from a tantalum oxide film. In this two-terminal device, electrical charges are stored on the surface of the oxide film. A voltage applied to the two terminals of a Tantalum capacitor will cause electrons to redistribute across the two poles, thus creating an electrical field on the oxide layer. The electrons will be attracted to the other pole, where the electrical field will cause the voltage to decrease, until a balance is reached and the capacitor reaches an equilibrium. The electrical properties of the capacitor are determined by the thickness of the oxide layer, which dictates the total amount of electrical energy that can be stored and discharged. This type of capacitor is often used as a large energy storage and filter element due to its ability to handle large capacitance values and its relatively low equivalent series resistance (ESR). It is also ideal for use in high frequency applications due to its low capacitance-to-low ESR ratio and its tight tolerance. In conclusion, the T491B684M035ZT tantalum capacitor is used in many applications from military and aerospace projects to consumer electronics. Its working principle is based on the electrochemical science of storing electrons on a tantalum oxide surface. Its advantages include its ability to handle large capacitance values and its low ESR, as well as its tight tolerance and relatively low capacitance-to-low ESR ratio for high-frequency applications.

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