T491C157M004AT4280

Lifetime @ Temp.:	2000 Hrs @ 125°C
Failure Rate:	--
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	C
Lead Spacing:	--
Height - Seated (Max):	0.110" (2.80mm)
Size / Dimension:	0.236" L x 0.126" W (6.00mm x 3.20mm)
Package / Case:	2312 (6032 Metric)
Mounting Type:	Surface Mount
Series:	T491
Operating Temperature:	-55°C ~ 125°C
ESR (Equivalent Series Resistance):	1.2 Ohm
Type:	Molded
Voltage - Rated:	4V
Tolerance:	±20%
Capacitance:	150µF
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

Tantalum capacitors have been used in electrical and electronic equipment for many years and are a reliable and efficient way to store electrical energy. The T491C157M004AT4280 is a type of aluminum electrolytic capacitor that uses tantalum as its dielectric. This type of capacitor is used in many different applications, including power supplies, DC-DC converters, audio equipment, and other electronic devices.

Construction and Working Principle

The T491C157M004AT4280 is a solid-state, non-moving capacitor that consists of two piece of anode and cathode plates with a tantalum electrolyte between them. The electrode plates are coated with a material called a dielectric, which is usually a ceramic or polymer material. When voltage is applied to the capacitor, it effectively creates an electrical charge on the anode plate and an opposing electrical charge on the cathode plate. This electrical charge creates an electrical field within the tantalum electrolytic which stores electrical energy. As the voltage across the capacitor increases, the electrical field between the capacitor plates also increases, allowing for the storage of more energy.

Application

Tantalum capacitors, including the T491C157M004AT4280, are used in a variety of different applications, such as power supplies, DC-DC converters, audio equipment, and other electronic applications. In power supplies, these capacitors are used to smooth out the electrical current, providing clean and efficient power. In DC-DC converters, these capacitors are used to control the output voltage for applications such as LED lights. In audio equipment, these capacitors can be used to filter out unwanted noise and to improve the clarity of sound. And in other electronic applications, such as sensors and communications equipment, these capacitors are used to store energy or to act as filters.

Advantages and Disadvantages

Tantalum capacitors, including the T491C157M004AT4280, offer several advantages over other types of capacitors. They have relatively low ESR (equivalent series resistance) and ESL (equivalent series inductance), making them extremely efficient and reliable. They also provide excellent leakage characteristics, meaning that they hold up well over time and maintain their electrical capacity even after long periods of use. Additionally, these capacitors are extremely small, allowing for their use in space-constrained applications.On the other hand, the T491C157M004AT4280 also has several drawbacks. The most significant disadvantage of these capacitors is their relatively high cost when compared to other types of capacitors. Additionally, these capacitors require careful handling and maintenance, as their dielectrics can be easily damaged by moisture, heat, or mechanical shock. Finally, there are safety concerns associated with these capacitors since they contain a small amount of potentially hazardous material.

Conclusion

The T491C157M004AT4280 is a type of tantalum capacitor that is used in a variety of applications, including power supplies, DC-DC converters, audio equipment, and other electronic devices. These capacitors are advantageous due to their low ESR and ESL, phenomenal leakage characteristics, and small form factor. However, these capacitors can be costly and require additional care to ensure proper performance.

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