M551B348M008AT

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Tantalum - Polymer Capacitors

The M551B348M008AT is a type of tantalum - polymer capacitor, specifically designed for use in automotive applications and withstanding temperatures up to 125°C. It utilises a surface mount design, usually smaller than the previous generation of alternative solid electrolytic capacitors. The tantalum - polymer capacitor is the most advanced type known to date, and features high temperature stability, as it allows for broad operating temperature range and is more robust than other types of capacitors.

Application Field

Tantalum - polymer capacitors such as the M551B348M008AT are typically used in automotive applications where higher power is required. These capacitors are especially suitable for engine control units, HVAC systems, power supplies, converters and other switch-mode power supplies. Additionally, they are frequently used in hybrid and electric cars due to their robustness, making them ideal for high voltage and temperature conditions.

Working Principle

The M551B348M008AT is constructed with a conductive polymer that immobilises positive ions in liquid electrolyte, preserving the required electrolyte support to ensure high stability and reliability when used in high temperature and vibration conditions. The polymer acts as the electrolyte and dielectric within the capacitor, therefore eliminating the need for a separator.

The electrolyte is activated with non-soluble and non-corrosive salts providing leak-proof protection, which improves the capacitors reliability. Furthermore, the electrolyte prevents oxidation of the electrodes, thus increasing the service life of the component and making it suitable for applications that require long-term and extended performance under extreme conditions.

The core of the M551B348M008AT is constructed with a solid tantalum cathode, which is separated and stabilised with an anodic film, forming the anode. As current passes between the two electrodes, a dielectric is formed, thus maintaining the capacitance during operation. This design provides a high volumatic efficiency, making the capacitor well suited for applications such as engine control units, audio equipment and harsh environment environments.

Conclusion

The M551B348M008AT, a tantalum - polymer capacitor, is designed for automotive applications and for withstanding temperatures up to 125°C. It is a robust component with high temperature stability, thanks to its solid tantalum cathode, and its performance is enhanced by the presence of non-soluble and non-corrosive salts in its electrolyte. This capacitor is ideal for applications such as engine control units, HVAC systems, power supplies, converters and other switch-mode power supplies.

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