A surface-mount type (SMD) tantalum capacitor—D-type tantalum capacitor 1

The D-type tantalum capacitor is a surface-mount device (SMD) tantalum capacitor, widely used in electronic equipment due to its compact size and high capacitance. Its standard dimensions are EIA 7343-31, measuring 7.3mm x 4.3mm x 3.1mm. Tantalum capacitors occupy a unique position among electronic components as they utilize tantalum metal as the anode material. Below is information on the D-type tantalum capacitor.diode,

I. Structure

Type D tantalum capacitors primarily consist of four components: a tantalum powder compact (acting as the anode), conductive polymer or manganese dioxide (acting as the cathode), metal leads (for circuit connection), and external encapsulation material. The tantalum powder is processed to form a porous structure, increasing its surface area and thereby enhancing capacitance. The anode and cathode are separated by a thin, insulating tantalum dioxide film, which serves as the dielectric of the capacitor.diode