591D475X9020B2T15H

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	--
Features:	General Purpose
Manufacturer Size Code:	B
Lead Spacing:	--
Height - Seated (Max):	0.059" (1.50mm)
Size / Dimension:	0.157" L x 0.110" W (4.00mm x 2.80mm)
Package / Case:	1611 (4028 Metric)
Mounting Type:	Surface Mount
Lifetime @ Temp.:	--
Series:	TANTAMOUNT®, 591D
ESR (Equivalent Series Resistance):	1.6 Ohm
Type:	Conformal Coated
Voltage - Rated:	20V
Tolerance:	±10%
Capacitance:	4.7µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors: 591D475X9020B2T15H Application Field and Working Principle

Tantalum capacitors are widely used in various applications such as mobile communication, television, computers, and other audio-visual devices as they can provide up to 70% higher capacitance densities than other capacitors, and they have a high operating temperature rating. The 591D475X9020B2T15H is the JECP standard part number for a molded-case, non-polarized, surface-mounted tantalum capacitor. It has a capacitance value of 47µF and is rated for 25V and with an operating temperature range of -55 to +85°C.

Application Fields

Tantalum capacitors like the 591D475X9020B2T15H are generally used in high-frequency circuits with low-level current and low-voltage applications. They are perfect for use in consumer electronics such as portable phones, computers, and media players. They are also used in military, aerospace, and medical applications due to their small size, high capacitance density, and resistance to temperature and corrosion.

Working Principle

A tantalum capacitor is a form of electrolytic capacitor, which is constructed with two plates, a dielectric electrolyte, and a solid electrolyte separating the two plates. The two plates consist of a conductive, Tantalum-coated anode and a conductive, highly porous, carbon-coated cathode. The dielectric electrolyte, generally a gel, is placed between the two plates and is responsible for providing electrical insulation and electrical charge storage. The solid electrolyte is usually an oxide film on the surface of the Tantalum anode and serves as an anode-cathode diode, protecting the capacitor from reverse polarity or over-voltage.At the beginning of the charging process, the oxide layer acts as an insulator and prevents any electrical conduction. As the voltage begins to increase, the dielectric constant of the oxide film decreases and when the voltage reaches a certain point, the oxide film conducts electrons and a current begins to flow. This process is known as dielectric breakdown, and the oxide layer acts as a very thin dielectric layer that stores electrical charge. As current flows through the oxide film and into the anode, an electric field is formed which creates an attractive force between the anode and the cathode. When the applied voltage is removed, the attractive force of the electric field causes the anode and the cathode to separate and the electric charge stored in the oxide film dissipates.

Conclusion

The 591D475X9020B2T15H is a reliable and efficient high-density tantalum capacitor perfect for low-level current and low-voltage applications. Its small size, high capacitance density, and resistance to temperature and corrosion make it highly suited to be used in portable devices, military, aerospace, and medical applications. It’s working principle releases energy via dielectric breakdown and then stores electric charge.

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