T540D476M020CH8605

Operating Temperature:	-55°C ~ 125°C
Features:	High Reliability
Ratings:	COTS
Manufacturer Size Code:	D
Lead Spacing:	--
Height - Seated (Max):	0.122" (3.10mm)
Size / Dimension:	0.287" L x 0.169" W (7.30mm x 4.30mm)
Package / Case:	2917 (7343 Metric)
Mounting Type:	Surface Mount
Lifetime @ Temp.:	2000 Hrs @ 125°C
Series:	KO-CAP® T540
ESR (Equivalent Series Resistance):	100 mOhm @ 100kHz
Type:	Molded
Voltage - Rated:	20V
Tolerance:	±20%
Moisture Sensitivity Level (MSL):	--
Capacitance:	47µF
Lead Free Status / RoHS Status:	--
Part Status:	Active

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Tantalum-Polymer Capacitors

The T540D476M020CH8605 is a type of tantalum-polymer capacitor. The capacitor’s construction is a combination of two core elements: a tantalum and a polymer element. The combination of these two elements allow for superior performance in applications where size, power and robustness are paramount. The tantalum element provides a high capacitance, inductive, and voltage rating. The polymer element offers a low equivalent series resistance (ESR) for high ripple current capability and a sustained high temperature rating. Applications

T540D476M020CH8605 capacitors are used for many broad-based applications, including power management, voltage regulation and DC-DC converters. In these applications, the capacitor\'s unique combination of high capacitance and low ESR allow for superior operation in systems where size, power, and robustness are critical. Additionally, the module\'s efficiency and power-handling capabilities permits them to be used in a wide range of both static and dynamic load conditions.These capacitors can also be used to filter power supply noise, reduce the effects of electromagnetic interference (EMI) on system operations, and minimize call-backs due to overheating. T540D476M020CH8605 capacitors can also be used in commercial, automotive and military applications where superior performance is required.

Working Principles

T540D476M020CH8605 capacitors are based on a pair of layered, conductive dielectrics. The first dielectric is a tantalum-oxide dielectric layer that serves as the capacitor’s positive plate. The second dielectric is a polyanion with a large amount of carbon-based electrodes that serve as the negatives plate. Both of these plates are then placed between two electrodes (an anode and a cathode) to complete the capacitor.When a potential difference is applied across the two plates of the capacitor, an electric field is generated. This electric field dynamically distorts the molecules in the polyanion so that both plates are able to store a greater amount of charge than would be possible with just the tantalum-oxide layer. This enhancement in charge storage allows capacitors to withstand large ripple currents while simultaneously offering superior performance.The high ESR of T540D476M020CH8605 capacitors also allows them to better absorb demands on the power supply that other capacitors may not be able to handle. This improved absorption of power makes the T540D476M020CH8605 ideal for applications such as voltage regulation and power over Ethernet (PoE) converters.

Conclusion

T540D476M020CH8605 tantalum-polymer capacitors offer a unique combination of high capacitance, low equivalent series resistance, and robust power handling for applications where size, power, and robustness are paramount. The combination of these attributes make T540D476M020CH8605 capacitors an ideal choice for voltage regulation, power management, DC-DC converters, and power over Ethernet (PoE) converters. Additionally, the capacitors can be used as filtering components to reduce EMI, reduce heating, and improve system performance.

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