TAJR685M006RNJ

Series:	TAJ
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	6.8µF
Tolerance:	±20%
Voltage - Rated:	6.3V
Type:	Molded
ESR (Equivalent Series Resistance):	7 Ohm
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	--
Mounting Type:	Surface Mount
Package / Case:	0805 (2012 Metric)
Size / Dimension:	0.081" L x 0.051" W (2.05mm x 1.30mm)
Height - Seated (Max):	0.047" (1.20mm)
Lead Spacing:	--
Manufacturer Size Code:	R
Features:	General Purpose
Failure Rate:	--

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Tantalum Capacitors

Tantalum capacitors are non-polarized, electrolytic capacitors which have very high capacitance per unit volume and size. They have a wide range of applications, from biomedical devices and military hardware to consumer electronics and audio equipment. TAJR685M006RNJ is one of the more popular and reliable tantalum capacitor series. This article will discuss the TAJR685M006RNJ application field and working principle.

The TAJR685M006RNJ is a radial, leaded, surface mount capacitor with a 25V DC rating. It features an anodized, chip shape aluminum case and a polarization-free, non-polar electrolyte. The TAJR685M006RNJ provides high capacitance in a small size, making it ideal for various applications in including decoupling, bypassing, smoothing, voltage hold, and tuning. It is widely used in a variety of electronic products such as computers, telecommunications equipment, medical and industrial devices, and automotive electronics.

The working principle of a tantalum capacitor is based on the electrolyte’s electrical properties. A tantalum capacitor consists of a tantalum foil anode and electrically conductive cathode. The anode has a layer of anodized, electrolytically conductive tantalum pentoxide which is the dielectric. The cathode consists of an electrolyte solution, typically an acid or alkaline, which permeates a porous carbon pellet. Together, these two materials form the capacitor, providing electrical capacitance. It is important to mention that when applying voltage over the terminals of a tantalum capacitor, the metal will ionize and create an electrostatic field between the metal and the electrolyte, resulting in a charge exchange. This is what allows the tantalum capacitor to store and discharge electrical current.

In comparison to other capacitor types, including ceramic, film, and aluminum electrolytic capacitors, tantalum capacitors have the highest capacity to weigh ratio. They have a low equivalent-series-resistance (ESR), high stability, and offer excellent frequency characteristics. These characteristics make them ideal for high-frequency applications such as in personal media players, cellphones, and digital cameras. While conventional ceramic capacitors have difficulty handling pulses at higher frequencies, tantalum capacitors excel at it. They also have a very low leakage current and temperature stability due to the high impurities in the electrolyte.

Another useful application for tantalum capacitors is in power factor correction. This is a technique used to optimize the power used by a power system and the resulting harmonic pollution. It works by inserting a capacitor in parallel with the load and adjusting the capacitor’s impedance in order to reduce the reactive power supplied by the system and increase its power factor. The use of a tantalum capacitor in this application provides a number of benefits, such as a superior ratio of power factor improvement/capacitor size, no temperature rise for aluminum electrolytic types, and a high efficiency of power use. In addition, these capacitors also have a long life, with the ability to functionally last up to 15 years without any detectable changes in its capacitance.

In conclusion, the TAJR685M006RNJ is a reliable, efficient and high-quality tantalum capacitor with a wide range of uses. It is the perfect choice for applications requiring a high capacitance and a small size, as well as those requiring excellent frequency characteristics and power factor correction. It has a low ESR and excellent temperature stability, making it suitable for various applications.

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