TM3C226M6R3CBA

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Tantalum capacitors are a form of electrolytic capacitor utilising the non-reactive and ductile metal known as tantalum. These capacitors offer an extremely high capacitance density, with a relatively low equivalent series resistance (ESR), making them particularly suitable for use as filtering capacitors in both DC and AC circuits. The most common type of tantalum capacitors are polarised or bipolar, meaning they must be connected with the correct polarity to ensure they operate properly. The TM3C226M6R3CBA is one such capacitor, meaning its application fields and working principle should be understood.

Construction of TM3C226M6R3CBA

The TM3C226M6R3CBA is a miniature, chip-type tantalum capacitor designed for surface mounting. It comes in a multilayered case, with an anode, cathode, and two terminals. On its anode is a porous tantalum electrode, which is then encased with two dielectric layers. The first dielectric layer is a manganese dioxide (MnO2) film, which has been altered using zirconium powder to increase its parameters working temperature range and provide higher insulation resistance (IR). The last layer is a thin plastic film, which serves to insulate the capacitor’s parts and the external environment. The two electrodes are connected to the two terminals, with solder connected to the terminals.

Working Principle of TM3C226M6R3CBA

The TM3C226M6R3CBA functions according to the basic principles of an electrolytic capacitor. When DC voltage is applied across the terminals, current flows through the capacitor, causing voltage to be dropped across the terminals. As the current flows, a positive layer is formed on the anode and a negative layer on the cathode. This “ionic bridge” formed between the two electrodes is what separates them and creates a capacitance between them. Once the desired voltage is reached, most of the electric field in the capacitor is acted upon by the dielectric layers, meaning current stops flowing and the capacitance is maximum.

Application Fields

The TM3C226M6R3CBA is a low-cost, general-purpose capacitor with an operating temperature range of -55°C to +125°C. Its relatively low ESR makes it suitable for use in audio and power circuits, most notably as an input filter capacitor in switch mode power supplies (SMPSs) and other DC-to-DC converters. This makes it suitable for demanding power applications in consumer electronics, computing, automotive, medical, and telecommunications industries. Its small size makes it ideal for space-constrained electronics, such as mobile phones, tablets, laptops, and portable audio players. It could also be used in general-purpose equiupment such as home appliances and batteries.

Conclusion

The TM3C226M6R3CBA is a miniature, chip-type tantalum capacitor designed to provide a high capacitance density with a relatively low equivalent series resistance. It functions according to the basic principles of an electrolytic capacitor, and is suitable for applications in both DC and AC circuits. Its small size, low cost and high temperature range make it ideal for use in consumer electronics, computing, automotive, medical, and telecommunications industries, as well as general-purpose equipment such as home appliances and batteries.

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