Tantalum capacitor

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. It consists of a pellet of porous tantalum metal as an anode, covered by an insulating oxide layer that forms the dielectric, surrounded by liquid or solid electrolyte as a cathode. Because of its very thin and relatively high permittivity dielectric layer, the tantalum capacitor distinguishes itself from other conventional and electrolytic capacitors in having high capacitance per volume (high volumetric efficiency) and lower weight.

Tantalum is a conflict resource. Tantalum electrolytic capacitors are considerably more expensive than comparable aluminum electrolytic capacitors.

Tantalum capacitors are inherently polarized components. Reverse voltage can destroy the capacitor. Non-polar or bipolar tantalum capacitors are made by effectively connecting two polarized capacitors in series, with the anodes oriented in opposite directions.

Tantalum electrolytic capacitors are extensively used in electronic devices that require stable capacitance, low leakage current, and where reliability is crucial.[1] Due to its reliability, durability and performance under extreme conditions, it is used in medical equipment,[2] aerospace and military applications.[3] Other applications include power supply units, measuring instruments, telecommunications equipment, and computer peripherals.[4]

  1. ^ Dhanasekharan Natarajan (2015). "Selection and Application of Components". Reliable Design of Electronic Equipment. Springer. p. 21. ISBN 9783319091105.
  2. ^ Geismar, Lizzie (Sep 1, 2017). "Tantalum Capacitors for Medical Applications". Medical Design Briefs. Retrieved June 30, 2024.
  3. ^ Harold M. Graves, Susan Daniel Tripp (1980). Tantalum electrolytic fixed capacitors from Japan : determination of no injury in investigation no. AA1921-159 under the Antidumping Act, 1921, as amended. United States International Trade Commission. p. 1. OCLC 6686521.
  4. ^ "Tantalum Capacitor Characteristics And Applications". Advanced Refractory Metals. Retrieved June 30, 2024.