299D686X0020FB1

Series:	TANTALEX®, 299D
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Capacitance:	68µF
Tolerance:	±20%
Voltage - Rated:	20V
Type:	Conformal Coated
ESR (Equivalent Series Resistance):	--
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	1000 Hrs @ 85°C
Mounting Type:	Through Hole
Package / Case:	Radial - 3 Leads
Size / Dimension:	0.360" L x 0.360" W (9.14mm x 9.14mm)
Height - Seated (Max):	0.620" (15.74mm)
Lead Spacing:	--
Manufacturer Size Code:	F
Ratings:	--
Features:	General Purpose
Failure Rate:	--

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Tantalum Capacitors

Tantalum capacitors are a type of electrochemically formed, solid electrolyte capacitor consisting of tantalum powder pressed into a pellet shape with an oxide coating. Tantalum capacitors are widely used due to their small size and high capacitance-to-volume ratio, light weight and high ripple current capability of up to 1000A at 85°C. The 299D686X0020FB1 is an axial type tantalum capacitor built in a 0402 surface-mount package. It has a voltage rating of 6.3V, a capacitance value of 0.68μF, and an ESR of 18mΩ.

Application Field

Tantalum capacitors are widely used due to their small size and high capacitance-to-volume ratio, and are used in a variety of electronic devices in many different types of industries, such as automotive, military, telecommunications, consumer electronics, computers, audio equipment and medical equipment. In automotive applications, tantalum capacitors are used in voltage converters, DC-DC converters, radio interference suppression, AC-DC converters, starters, lighting, sensors, air bags and other safety systems. In consumer electronics, tantalum capacitors are used in applications such as mobile phones, LCDs, printers, digital cameras, audio equipment, portable gaming systems and personal digital assistants (PDAs).In computers, tantalum capacitors are used to provide power supply filtering, decoupling and bypassing in both server and desktop computer motherboards, in power supply designs, and as metallized capacitance devices in storage and memory modules. In telecommunications, tantalum capacitors are used in applications such as modems, routers, optical networks, broadcast receivers and satellite communications, as well as in battery charger and back-up circuits.

Working Principle

Tantalum capacitors work on the principle of an electrolytic cell. The oxidized pellet of the capacitor is the positive anode and the metal counter-electrode is the negative cathode. When current passes between the anode and cathode through the electrolytic solution, an electric charge is stored on the anode and a depletion layer is formed on the cathode. This depletion layer in turn blocks further electron flow, allowing the capacitor to store charge and energy.Tantalum capacitors have higher ripple current capability than other types of electrolytic capacitors, which makes them ideal for applications that require high current charge and discharge. Due to their higher ESR and capacitance-to-volume ratio, tantalum capacitors also have higher robustness and temperature stability than other types of capacitors. In summary, the 299D686X0020FB1 is an axial-type, 0402 surface-mount tantalum capacitor that is used in automotive, consumer electronics, communications, computers and telecommunications applications. It has a voltage rating of 6.3V, a capacitance value of 0.68μF, and an ESR of 18mΩ, and its working principle is based on the principle of an electrolytic cell, where the oxidized pellet is the positive anode and the metal counter-electrode is the negative cathode.

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