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Tantalum capacitors in different styles: axial, radial and SMD-chip versions (size comparison with a match) 10 μF 30 VDC-rated tantalum capacitors, solid electrolyte epoxy-dipped style. A tantalum electrolytic capacitor is an electrolytic capacitor , a passive component of electronic circuits .
Aluminum, tantalum and niobium electrolytic capacitors are named after the material used as the anode and the construction of the cathode (electrolyte) Polymer capacitors are aluminum, tantalum or niobium electrolytic capacitors with conductive polymer as electrolyte; Supercapacitor is the family name for:
A real world model of an electrolytic capacitor. Shows the capacitor (C), the dieletric leakage resistance (R leakage), and the effective series resitance and inductance (R ESR and L ESL). Date: 25 November 2006: Source: Own drawing
Polymer tantalum electrolytic capacitors have ESR values that are approximately only 1/10 of the value of tantalum electrolytic capacitors with manganese dioxide electrolyte of the same size. By a multi-anode technique in which several anode blocks are connected in parallel in one case, the ESR value can be reduced again.
For example, a metric 2520 component is 2.5 mm by 2.0 mm which corresponds roughly to 0.10 inches by 0.08 inches (hence, imperial size is 1008). Exceptions occur for imperial in the two smallest rectangular passive sizes. The metric codes still represent the dimensions in mm, even though the imperial size codes are no longer aligned.
Description: Diagram comparing construction of three types of capacitors: electrostatic (normal), electrolytic (high capacity) and electrochemical (supercapacitors).
Miniaturization of aluminium electrolytic capacitors from 1960 to 2005 in case 10x16mm up to factor ten ... For tantalum capacitors a DC bias voltage of 1.1 to 1.5 V ...
Solid tantalum capacitors must be voltage derated in all applications. A 50% voltage derating is recommended and generally accepted as the industry standard; e.g. a 50V solid tantalum capacitor should never be exposed to an actual application voltage above 25V. Solid tantalum capacitors are very reliable components if the proper care is taken ...