T550B686K030AT4250

Tantalum-polymer capacitors are an important type of passive components in the fields of electronics and electrical engineering, across a variety of consumer and automotive sectors. This particular type of capacitor, known as the T550B686K030AT4250, is particularly well suited to high frequency applications due to its low ESR and high capacitance.

In general, a typical capacitor’s ability to store energy, known as capacitance, is proportional to its area and inversely proportional to its dielectric thickness. Tantalum-polymer capacitors take advantage of this, with the combination of tantalum and polymers providing increased stacked capacitor area when compared to traditional, monolithic components. This increased area allows for a higher capacitance and thus further reduced ESR.

The T550B686K030AT4250 capacitor is a double-sided SMT (surface mount technology) part, designed for use on a wide range of high frequency and high performance applications. Its extended high voltage capability also makes it especially suitable for use in automotive, power line, and semiconductor applications. The part can be operated from temperatures ranging from -55°C to +125°C, which adds to its versatility.

One of the key advantages of the T550B686K030AT4250 capacitor is its low ESR of just 0.001 ohms when used with a 100-kHz test frequency. This low ESR reduces voltage drops and ensures that current heights remain unchanged, resulting in better and more stable performance, with lower power loss. In addition, its high capacitance of 500µF allows for a much faster rise time, which is beneficial for high speed digital circuits and pulsed signal applications.

The T550B686K030AT4250 capacitor is capable of withstanding significant levels of current and can provide excellent noise reduction, making it especially useful in high voltage, high current and noise sensitive applications. Its anisotropic properties also make it particularly suitable for power line decoupling, as well as increasing EMI shielding effectiveness in electrical circuits.

The construction and working of the T550B686K030AT4250 capacitor consists of a tantalum-polymer dielectric layer that is sandwiched between two conductive plates, similar to most standard dielectric capacitors. The dielectric is made up of an organic, non-crystalline material that functions as an insulator, allowing electrical charges to be stored on either side but preventing them from moving across the dielectric. This arrangement works to create a layer of electrons and holes – known as electric double layer – which forms the basis for the capacitor’s functionality.

The two conductive plates of the T550B686K030AT4250 capacitor are generally made from an electrolytic material, such as aluminium, which acts as a conductor. This is usually covered with an additional layer that helps to keep the two plates in contact with each other, further improving the capacitor’s performance. The two plates are connected to the external circuit using electrical connections known as leads.

In summary, the T550B686K030AT4250 is an advanced tantalum-polymer capacitor that excels in a wide variety of applications. Its low ESR and high capacitance make it especially useful in high frequency applications, while its extended high voltage capabilities make it ideal for use in automotive, power line, and semiconductor applications. Its double-sided SMT design and anisotropic properties further enhance its versatility and make it especially suited to noise reduction and power line decoupling. Consequently, the T550B686K030AT4250 is an invaluable part for many electronics and electrical engineering applications.