T540D337K004DH8605

Series:	KO-CAP® T540
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	330µF
Tolerance:	±10%
Voltage - Rated:	4V
Type:	Molded
ESR (Equivalent Series Resistance):	40 mOhm @ 100kHz
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	2000 Hrs @ 125°C
Mounting Type:	Surface Mount
Package / Case:	2917 (7343 Metric)
Size / Dimension:	0.287" L x 0.169" W (7.30mm x 4.30mm)
Height - Seated (Max):	0.122" (3.10mm)
Lead Spacing:	--
Manufacturer Size Code:	D
Ratings:	COTS
Features:	High Reliability

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Tantalum - Polymer Capacitors

Tantalum polymer capacitors, or T540D337K004DH8605 capacitors, are a type of electrolytic capacitor, which consists of two electrodes separated by an electrolytic solution. The two electrodes are typically made of tantalum and polypropylene, with the polypropylene acting as the dielectric and the tantalum acting as the conductive plate. While these capacitors are not as widely used as standard electrolytic capacitors, they do offer a unique set of advantages which make them highly desirable in certain applications.

Application Field

Tantalum polymer capacitors are commonly used in a variety of applications, including power supplies, high-frequency circuits, and signal filtering. Their unique properties make them ideal for applications where size and space are limited, such as in the fabrication of small-footprint PC boards. They are also commonly used in low impedance situations, where their low ESR (equivalent series resistance) and ESL (equivalent series inductance) make them an attractive option.In addition to these applications, tantalum polymer capacitors are also used in a variety applications. Due to their relatively high capacitance values, they are ideal for use in high voltage, RF, and pulse power circuits. Thanks to their low ESR and ESL characteristics, they are particularly well suited for low noise, high frequency applications. They can also be used in applications such as audio equipment and telecommunications, where their high capacitance and high voltage capabilities are a major advantage.

Working Principle

Like most capacitors, the T540D337K004DH8605 capacitor functions by storing charge on one side of its electrodes. When a DC voltage is applied, electric current flows through the device, resulting in a charge buildup on both of its electrodes. When the current is removed, the electric field created by the charge causes a reversal of pole on the capacitance.The current flow in the capacitor creates a contact resistance between the electrodes, which is referred to as an equivalent series resistance (ESR) value. This ESR value is a key element of the capacitor\'s performance, as it determines the amount of power and heat that is dissipated by the device.In addition to the ESR value, the ESL value of the capacitor is also a factor. ESL stands for equivalent series inductance, and it is the inductance of the capacitor which determines how long the charge will be retained on the capacitor. Lower ESL values are desirable in many applications, as it helps ensure that the required charge is retained longer.

Advantages and Disadvantages

Tantalum polymer capacitors offer a number of advantages over other types of capacitors. These include their small size and light weight, as well as their relatively high capacitance, low ESR values, and high voltage and RF capabilities. Furthermore, the use of polypropylene as dielectric material helps make these capacitors less prone to temperature and humidity fluctuations.On the other hand, there are a few drawbacks associated with the use of tantalum polymer capacitors. These include their relatively high cost, as well as their moderate self-discharge rate. Furthermore, the use of tantalum as the conductive material makes them prone to failure if exposed to excessive voltage or current, a problem which can be mostly mitigated by using a passive load.

Conclusion

The T540D337K004DH8605 capacitor is a popular and versatile tantalum polymer capacitor, offering outstanding capacitance, low ESR and ESL, and high voltage and RF capabilities. Its unique properties make it highly desirable in a variety of applications, including power supplies, high-frequency circuits, and signal filtering. While it is not as widely used as standard electrolytic capacitors, it is still a reliable option for those looking for a compact, lightweight, and cost-effective solution. Its performance and features make it an ideal choice for applications where size and space are limited.

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