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Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor. They are similar to aluminum electrolytic capacitors in terms of construction, but their wet electrolyte is made from a type of semiconductor material, tantalum dioxide, which has a higher dielectric constant than aluminum oxide paste. As a result, they have higher capacitance and higher voltage ratings.

The 135D228X9006K2 capacitor is a surface-mounted tantalum capacitor with a capacitance of 22 microfarads (μF), voltage rating of 6 volts (V), and a maximum operating temperature of 85°C. It is a metallized, tantalum organic semiconductor (MTO) capacitor with a dissolution-redistributed (DR) anode for low ESL. It is designed for a wide range of applications, including telecom, consumer electronics, networking, and other industrial applications.

Classification

Tantalum capacitors are divided into two types, namely polymer and wet. Each type has its own special characteristics and applications. Polymer capacitors are constructed using an organic electrolyte and a metallized anode. Their capacitance range is generally between 10 µF and 470 µF and their maximum working voltage varies between 2.5V and 6.3V. They are small, lightweight, and actually have better reliability and temperature characteristics than wet capacitors.

Wet tantalum capacitors use aqueous electrolyte containing LiCl (lithium chloride) or NaCl (sodium chloride). They are larger and have a lower maximum operating temperature than polymer capacitors, with a maximum voltage of typically 10V or 25V. Their capacitance range is from about 1 µF to 4,700 µF.

Working Principle

Tantalum capacitors work on the principle of coulomb charge. A tantalum capacitor consists of two conducting surfaces, the anode and the cathode, which are separated by a semi-insulating dielectric layer, typically tantalum dioxide (Ta2O5). The anode surface of the capacitor is immersed in a liquid electrolyte containing dissolved ions and an electric current is applied between the two electrodes. The anode electrodes attract and trap the positively charged ions in the liquid electrolyte which form a conducting layer to produce positive charges on the anode. The cathode attracts and traps the negative ions in the liquid electrolyte which form a conducting layer to produce negative charges on the cathode.

When the capacitor is connected to a power source, a voltage is applied across its electrodes. This causes a flow of electrons from the cathode to the anode, and the negative charges build up on the cathode while the positive charges build up on the anode. The resulting electric field across the dielectric layer creates a potential energy that is stored in the form of an electric charge. When the capacitor is disconnected from the power source, the voltage across the electrodes is minimized and the stored energy is released.

Applications

Tantalum capacitors are widely used in modern electronics for applications such as audio frequency range, broadcasting, computer and telecommunications equipment, circuit protection, and power supplies. The 135D228X9006K2 is particularly popular for use in audio devices, with its low ESL ( Equivalent Series Inductance) and high temperature stability. Aside from that, it can also be used in high-frequency filtering circuits in broadcast systems, power converters, and rectifiers. It is also commonly used in medical, automotive, and defense applications, due to its durability and reliability.

Conclusion

The 135D228X9006K2 tantalum capacitor is a widely used component in modern electronics, with its low ESL, small size, and high temperature stability. It is an excellent choice for audio frequency range, broadcasting, medical, computer, communications, automotive, and defense applications, among others.

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