M551B418K006AS

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Tantalum capacitors are ceramic capacitors made of tantalum. They are usually of the two-terminal type, often featuring a relatively high capacitance per unit volume compared to other ceramic capacitors. One of the most commonly used tantalum capacitors is the M551B418K006AS. It is an advanced tantalum-polymer capacitor that offers excellent performance in temperature stability, temperature cycle and vibration. Additionally, it is environmentally-friendly, halogen-free, and cost-effective.

The M551B418K006AS application field is mainly in audio systems and radio frequency receivers, where it excels in terms of low noise and low voltage dropout. It is also suitable for long-term use in automotive, consumer and industrial applications, as it delivers reliable coupling capacitors for solid state oscillators and buffering power supplies, as well as timing and heightening circuit applications.

The working principle of tantalum-polymer capacitors is based on the idea of electrochemical double layer capacitance. The principle is fairly simple but essentially powerful: two electrodes are immersed in an electrolyte solution, which consists of positive and negative ions. When a voltage is applied across the electrodes, positive ions move towards the negative electrode, and negative ions move towards the positive electrode. This action causes a "storing up" of charge, which is then released as the voltage is removed, creating a currrent flow.

Tantalum-polymer capacitors are more reliable than ceramic capacitors due to their particular working principle and construction; the electrode terminals are encapsulated within a polymer film, designed to offer greater mechanical robustness and moisture protection compared to conventional ceramic capacitors. Additionally, the polymer electrolyte provides excellent surface insulation, enabling the use of thin films, and thus resulting in a much lower physical height of the capacitor.

Tantalum-polymer capacitors also feature very low equivalent series resistance (ESR), typically around 10% to 15% of the value for an equivalent tantalum capacitor. This property is determined by the capacitors’ construction and electrolyte composition, with the use of a highly conductive tantalum-polymer electrolyte allowing for decreased device impedances and greater power handling capabilities.

Another benefit of the M551B418K006AS is its excellent temperature between -55°C to 125°C. Conventionally, ceramic capacitors have a temperature range of between -25°C and 85°C, so the M551B418K006AS is better able to cope with temperature extremes. Consequently, it is an ideal choice for applications where a wide temperature range is needed, such as in heavy industrial, military, and medical systems.

The M551B418K006AS tantalum-polymer capacitor is an advanced capacitor that offers excellent performance in temperature stability, temperature cycle and vibration, while also providing excellent surface insulation, low ESR and improved power handling capabilities. It is a highly reliable and cost-effective solution for audio systems, radio frequency receivers, automotive, consumer, and industrial applications which require a wide temperature range.

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