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Tantalum - Polymer Capacitors

Tantalum-polymer capacitors (also known as T-pols) are a popular class of capacitors consisting of thin layers of tantalum foil, alternating with polymeric insulating layers. Tantalum-polymer capacitors offer excellent performance in terms of temperature stability, ESR and leakage current, typically in the range of -55°C to 125°C and down to a few milliohms of ESR and a few picoamps of leakage current. This makes T-pols particularly suitable for high-frequency applications, where low ESR and low capacitance losses are of prime importance.

T540D336M020BT8605 Application Field

The T540D336M020BT8605 is a multilayer, tantalum-polymer chip capacitor. It features a 2.5 Vdc voltage rating, a high frequency range of up to 16 GHz, an excellent temperature stability, low ESR, and an extremely low leakage current. It is typically used in consumer electronics, automotive, smart home, and medical applications where a combination of low ESR, low capacitance loss, and high-temperature stability is required.

T540D336M020BT8605 Working Principle

The T540D336M020BT8605 capacitor utilizes thin layers of tantalum foil, alternating with polymeric insulating layers. This structure offers excellent temperature stability and increases the ESR and leakage current of the capacitor over traditional tantalum capacitors. The core of the capacitor consists of three metal dielectrics, with a low ESR material sandwiched in between. The metal dielectrics are formed into multilayered layers, covered by a thin Film on the top. This construction provides excellent temperature stability and ESR stability across a wide range of temperatures and frequencies.

When a voltage is applied to the T540D336M020BT8605 capacitor, a current will flow through the three metal dielectric layers. This current is then stored as an electrical field in the dielectric, which in turn produces an electric potential across the capacitor. This potential is then used to transfer charge from one electrode to the other. The tantalum-polymer capacitor is ideal for high-frequency applications, as it offers excellent temperature stability, low ESR, and low capacitance losses.

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