Operating Temperature:	-55°C ~ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	D
Lead Spacing:	--
Height - Seated (Max):	0.122" (3.10mm)
Size / Dimension:	0.287" L x 0.169" W (7.30mm x 4.30mm)
Package / Case:	2917 (7343 Metric)
Mounting Type:	Surface Mount
Lifetime @ Temp.:	2000 Hrs @ 125°C
Series:	T495
ESR (Equivalent Series Resistance):	200 mOhm @ 100kHz
Type:	Molded
Voltage - Rated:	20V
Tolerance:	±10%
Capacitance:	47µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

T495D476K020ZTE200 is a type of tantalum capacitors. Tantalum capacitors are electrolytic capacitors made of the oxide of the element tantalum as the dielectric layer, first introduced in the 1950s. These capacitors offer numerous advantages over other types of capacitors which has made them a popular choice across many different applications.Tantalum capacitors are used in many different electronic applications, such as in high frequency circuits, medical equipment, audio equipment, aerospace electronics, automotive electronics, and telecommunications equipment. They are also used in radio frequency circuits, signal processing, power supply, and test equipment. Tantalum capacitors have a very low ESR (equivalent series resistance) and so they are constantly being used in very noisy systems or in high-frequency or pulse applications. The working principle of a tantalum capacitor is based on capacitance. It is a non-polarised capacitor with two electrodes that are separated by a dielectric material. It consists of a positive electrode (anode) that is coated with tantalum, a conducting oxide layer, a dielectric layer of tantalum pentoxide, and a negative electrode (cathode). When voltage is applied to the anode, a capacitance is created between the two metallic plates. This capacitance stores a charge. The dielectric insulation prevents current flow between the anode and the cathode, thus allowing for charge storage. Tantalum capacitors come in a variety of sizes and shapes, such as axial, vertical, molded, cross-slot, and snap-in. They are also available with capacitance values ranging from 0.1µF to 3300µF and voltage ratings from 10V to 500V. The capacitance value and voltage ratings selected are based on application and the quality required for that specific application.The advantages of tantalum capacitors include good frequency characteristics, low electrical losses, and good temperature stability. The higher capacitance values in small sizes, and the very low ESR values are also attractive characteristics. Additionally, its inherently low profile enables it to be mounted easily in large scale production lines. Tantalum capacitors also offer excellent dielectric properties, and electrical and mechanical stability. The disadvantages of tantalum capacitors include their relatively high cost compared to ceramic and aluminium capacitors, as well as the limited frequency range and the limited range of capacitance. Furthermore, they also tend to have a high self-inductance, which can cause problems in high frequency applications. Overall, tantalum capacitors offer excellent capacitance performance for a wide range of applications, and are a popular choice in the electronic industry. They are especially suitable for high-frequency and pulse applications, due to their low ESR values and high capacitance values. By properly selecting the appropriate capacitance value and voltage ratings, tantalum capacitors can be used in a wide variety of applications with great success.

References

1. Ceramic and Tantalum Capacitors: The Basics. (2017, April 13). Retrieved from https://www.rs-online.com/designspark/ceramic-and-tantalum-capacitors-the-basics-part-12. Tantalum Capacitors. (2018, March 2). Retrieved from https://www.panasonic-electric-works.eu/capacitors/tantalum-capacitors3. Eriksson, M. (2016, August 15). A Beginner\'s Guide to Capacitors. Retrieved from https://learn.sparkfun.com/tutorials/beginners-guide-to-capacitors

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