TAJR684M016RNJ

Voltage - Rated:	16V
Type:	Molded
ESR (Equivalent Series Resistance):	25 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:	--
Series:	TAJ
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	0.68µF
Tolerance:	±20%

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Tantalum Capacitors: TAJR684M016RNJ Application Field and Working Principle

Tantalum capacitors are tantalum electrolytic capacitors whose construction uses tantalum metal for the anode. They are widely used in cell phone, digital cameras and other portable electronic devices where small size and high capacitance are required. The TAJR684M016RNJ is one of the latest generation of low-profile tantalum capacitors manufactured by Vishay Intertechnology, Inc., and its application field and working principle will be further introduced in the following paragraphs.

Application Field

The TAJR684M016RNJ is a radial-leaded, molded-case tantalum capacitor with an anodic surface finished with matte tin over nickel barrier plating for the anode and a Ni-Sn layer for the cathode. As Vishay claims, this low-profile product is designed for use to supply power lines in small, space-constrained consumer applications such as cellular phones, digital cameras, and other consumer electronic devices. It is also suitable for industrial and military applications, such as automotive and communication systems, since it provides high temperature stable performance in such operation circumstances.

Working Principle

The TAJR684M016RNJ works by creating an electrostatic field between the two charged electrodes separated by an electrolytic solution called a dielectric. The anode of the capacitor is made of a tantalum pellet, which can be immersed in liquid electrolyte or solid electrolyte. An anodic oxide layer is formed on the surface of the tantalum pellet which serves as the dielectric material of the capacitor. The layer is typically made from tantalum pentoxide, following a controlled anodizing process.When a voltage is applied to the capacitor, the potential difference applied between the two electrodes produces an electrostatic field across the two, which creates charge separation between the electrodes. This charge separation is maintained until the capacitor has obtained its rated capacitance, which is largely determined by the thickness of the anodic oxide layer. Furthermore, the combination of the anodic oxide layer and the electrolytes, which is made of either liquid electrolyte or solid electrolyte, provides the necessary conditions for possible side-reactions to change the capacitor\'s character.

Conclusion

The TAJR684M016RNJ is one of the latest generation of low-profile tantalum capacitors manufactured by Vishay Intertechnology, Inc., and it is designed for use to supply power lines in small, space-constrained consumer applications, as well as industrial and military applications. The capacitor works by producing an electrostatic field between the two charged electrodes which are separated by an anodic oxide layer. The thickness of the layer, combined with the electrolytes, determines the capacitance of the product and overall performance.

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