T95S155M020CSSL

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Tantalum capacitors are specialized capacitors which are made from a metal oxide containing tantalum. They have a variety of uses, from decoupling high-frequency signal lines in communications applications to battery hold-up in DC/DC converters. The T95S155M020CSSL is a Class 2 sealed tantalum capacitor (solid tantalum with risk of explosion). Its intended use is to create a decoupling capacitance for high-frequency signals, usually in mobile, automotive, or avionics communications circuits.

Tantalum capacitors are advantageous in many applications due to their relatively small size, superior capacitance-to-volume ratio, low ESR (equivalent series resistance), high temperature operation, high volumetric efficiency, and long life expectancy. The T95S155M020CSSL has a maximum operating temperature of +155°C and a typical capacitance rating of 47µF – 140µF.

The working principle of the T95S155M020CSSL is a simplified version of the electric double layer capacitance (EDLC) theories. In EDLCs, an ionic film forms on the surface of the dielectric material (such as the tantalum pentoxide used in the T95S155M020CSSL). This film serves as the negative ‘plate’ of the capacitor and is comprised of several positively charged ionic layers. Meanwhile, the outer case of the capacitor serves as the positive plate. When a voltage is applied to the capacitor, the positively charged ions on the negative plate move towards the positive plate and are attracted to the outer case. This forms a capacitor’s dielectric form and allows the capacitor to store its charge.

The T95S155M020CSSL is typically used in mobile or avionics products due to its high temperature operation and its ability to handle higher voltage and power inputs. It is highly resistant to moisture and can provide excellent filtering and sensing performance. These applications include power conversion and rectification in power supplies, pulsed-power support in laser systems, and switching in RF communications. Its high temperature operation also makes it ideal for use in automotive electronics.

In summary, the T95S155M020CSSL is a high-quality, Class 2 sealed tantalum capacitor. It is optimized for use in high-frequency communication circuits and applications requiring high temperature operation. Its EDLC working principle gives it greater capacitance-to-volume ratio, allowing it to handle higher voltages and power inputs. Its ability to handle higher temperature operation makes it an ideal choice for automotive applications.

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