T551B127M050AT4251

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Tantalum – Polymer Capacitors are characterized by their small size and high capacitance. The T551B127M050AT4251 is an example of a Tantalum – Polymer capacitor designed for low-equivalent series resistance (ESR) in the circuit to improve performance. The capacitor has an operating temperature range of -55 to +125 degrees Celsius and a capacitance rating of 1.25μF ± 10%.

The primary application of the T551B127M050AT4251 tantalum – polymer capacitor is in high-frequency noise suppression and power supply decoupling in automotive, military, industrial, and medical applications. This type of capacitor also finds use as an input capacitance to reduce power supply current flowing through active components. The capacitor can also be used as a bypass capacitor to modify phase compensation and noise reduction in amplifiers.

Working Principle

Tantalum – polymer capacitors function by being placed in the signal path of an electronic circuit, allowing the charge carriers to be stored and released in the signal as needed. This action quickly equalizes the signal shape, resulting in better signal fidelity and filtered noise. The charge storage capacity of the tantalum – polymer capacitors forms the basis for its noise suppression characteristics.

The T551B127M050AT4251 specifically uses Tantalum – polymer films as the electrical dielectric material, with the use of a solid tantalum oxide layer that is deposited directly onto the surface to create the capacitor. This makes for a very stable dielectric, with features such as a low ESR, low losses and a wide voltage range. The capacitor also has an improved resistance against environmental agents, extreme temperatures and humid conditions, making it suitable for use in a wide range of applications.

This capacitor is composed of solid polymer dielectric surrounded by tantalum powder on either side. One side of the tantalum capacitor has a positive layer made of the powder and the other side has the negative layer. As there is a layer of tantalum powder between the layers, a dielectric field is established within the capacitor. When the capacitor is connected to a voltage source, and thus charged, a proportional amount of charge is stored in the dielectric field and as a result, a capacitance is formed.

Conclusion

Tantalum – polymer capacitors are ideal for a wide range of applications, such as high-frequency noise suppression, power supply decoupling, and bypass capacitors. The T551B127M050AT4251 is a high-performance tantalum – polymer capacitor with a low ESR, wide temperature range, and a capacitance rating of 1.25μF ± 10%. It is used in automotive, military, industrial, and medical applications as well as in amplifiers to reduce power supply current and in input capacitance to enhance noise reduction.

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