T551B227M008AT4251

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Tantalum capacitors are one of the most widely used types of capacitors available. Tantalum-Polymer capacitors are a particular variant of tantalum capacitors that offer the highest capacitance density and lowest equivalent series resistance (ESR) of any capacitor type. The T551B227M008AT4251 is a particular tantalum-polymer capacitor that is suitable for a variety of applications.

T551B227M008AT4251 Application Field and Working Principle

The T551B227M008AT4251 is a surface- mounted solid tantalum capacitors with polymer cathode construction. Its anode material is fabricated from highly conductive anodized tantalum and the cathode material is proprietary solid organic polymer. It is designed for large scale production with a long useful life, and is suitable for use in standard printed circuit board (PCB) assembly technology. This type of capacitor has a voltage rating of 4V with a capacitance of 0.227uF (227 nano Farad), making it suitable for a wide variety of applications where low ESR and high volumetric efficiency are required, such as in managing voltage drops in power supplies, decoupling, and timing applications.

The T551B227M008AT4251 is a polarized capacitor and must be connected with proper polarity, which is marked on the side of the device. It is rated to operate at a temperature range of -55C to +125C. The device is designed with a capacitance deviation of +/- 20%. Using a nickel barrier termination, it is capable of soldering to most printed circuit boards (PCBs) under standard conditions. The capacitance stability of the T551B227M008AT4251 is excellent, even after extended exposure to temperature variations and applied voltage.

The T551B227M008AT4251 has a low ESR, enabling higher ripple current than a comparable non-polymer capacitor. This capacitor’s design also provides vibration and mechanical shock resistance, making it very reliable in high-shock environments. Additionally, the T551B227M008AT4251 has excellent reverse-recovery characteristics, meaning less noise will be produced when the capacitor is being charged and discharged. The device also has a wide operating temperature range and moisture resistance.

Applications

The T551B227M008AT4251 is well-suited for a variety of applications such as DC/DC converters, voltage regulation, filter circuits, and signal line noise suppression. This capacitor is also suitable for other applications such as LCD/LED backlighting and decoupling for automotive electronics. Its highly desirable properties such as low ESR, capacitance stability, and moisture resistance make it ideal for small signal decoupling, power line decoupling, and high-frequency signal processing applications.

Conclusion

The T551B227M008AT4251 is a tantalum-polymer capacitor that offers excellent features such as low equivalent series resistance, high capacitance stability, and good moisture resistance. It is suitable for a variety of applications such as DC/DC converters, voltage regulation, filter circuits, signal line noise suppression, and high-frequency signal processing. The high volumetric efficiency and excellent vibration/shock resistance of this device make it very reliable in real-world applications.

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