T551B127K015AH4251

Operating Temperature:	-55°C ~ 125°C
Features:	General Purpose
Ratings:	--
Manufacturer Size Code:	B
Lead Spacing:	--
Height - Seated (Max):	--
Size / Dimension:	0.312" Dia x 0.641" L (7.92mm x 16.28mm)
Package / Case:	Axial, Can
Mounting Type:	Through Hole
Lifetime @ Temp.:	2000 Hrs @ 85°C
Series:	T551
ESR (Equivalent Series Resistance):	110 mOhm
Type:	Hermetically Sealed
Voltage - Rated:	15V
Tolerance:	±10%
Capacitance:	120µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tray

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Tantalum - Polymer Capacitors

Tantalum - Polymer Capacitors are commonly used in a wide range of applications from electronics to telecommunications. The main purpose of these capacitors is to store energy for a short period of time. They are also known for their high capacitance and energy density as compared to other traditional Capacitors.In this article, we will discuss the application field and working principle of a particular example of these capacitors: the T551B127K015AH4251.

Characteristics and Usage

The T551B127K015AH4251 is a P255-rated capacitor capable of withstanding up to 8 volts. Additionally, it features low equivalent series resistance (ESR) and high-impedance values. This makes it excellent for applications such as high frequency signal filtering, time-delay circuits, switched power systems, high power audio amplifiers, and data processing systems. Tantalum - Polymer Capacitors provide high-frequency performance capabilities and low ESR products. They are ideal for high temperature operation and robust vibration applications, due to their small form factor and wide operating temperature range.

Construction and Working Principle

The T551B127K015AH4251 capacitor is constructed from tantalum-polymer material and is composed of an outer “sheath” and an inner “cell”. The sheath contains a polymer film that serves as the insulation for the capacitor. Inside the cell is a porous tantalum anode and a layer of electrolytic material.The working principle of the T551B127K015AH4251 involves the use of the capacitor’s dielectric material to store electrical charge. The dielectric material, when placed between two conductors, will become polarized due to the application of electrical potential. This polarization causes a buildup of electrical charge and creates an electric field.Additionally, the tantalum anode and electrolytic layer form what is called an “electrochemical cell”. This cell is responsible for the conversion of chemical energy into electrical energy. This energy is then stored in the capacitor and can be discharged when needed.

Advantages and Limitations

The primary advantages of the T551B127K015AH4251 are its high capacitance, low equivalent series resistance, and wide operating temperature range. Additionally, it has a high self-healing capability and is mechanically robust.The primary limitation of this capacitor is its limited voltage rating. It is only rated for 8 volts and therefore should not be used in applications with higher voltage requirements. Furthermore, it has a relatively high cost due to its higher-end construction materials and features.

Conclusion

In conclusion, the T551B127K015AH4251 capacitor is an excellent choice for a wide range of applications, due to its high capacitance, low ESR, and wide operating temperature range. Its primary limitation is its limited voltage rating of 8 volts, which should be taken into account when selecting a capacitor for an application.

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