Capacitors address limitations of aqueous supercapacitors

Unlike aqueous supercapacitors, the wet tantalum capacitors are rated for continuous high temperature operation to at least +85°C and are compatible with both wave and reflow soldering to a PCB. The capacitors are available with a CV value of 50mF at 6.3V, making them suitable for use in a variety of harsh environment applications, such as pulse applications, energy harvesting, energy storage, military electronics, and avionics.

The TWD DCUltraMax capacitors, which are rated for use in temperatures ranging from -55 to +85°C, have capacitance and voltage values of 50-150mF and 6.3-2.5V, respectively. The company are, however, developing series extensions which have CV values of 150mF at 2.5V, and are rated for a maximum operating temperature of 105°C. Exhibiting a low DCL of 0.0001CV, the wet tantalum capacitors do not require derating, and are available with lead-free or SnPb terminations. The capacitors are packaged in a DSCC T4 case and measure 9.52mm in diameter without an insulating sleeve and 10.31mm with a sleeve. The terminal welded to each case measures 57.15mm.

“Using a design approach that employs high CV tantalum powders, AVX has created high CV wet tantalum capacitors that both rival the extremely high volumetric capacitance densities of aqueous supercapacitors and conquer their limitations by tolerating higher temperatures and the stresses associated with wave and reflow soldering,” commented Tomas Zednicek, Technical Marketing Manager, AVX. “The TWD DCUltraMax series offers design engineers in the energy, military, and aerospace industries a high reliability, value-added alternative to aqueous supercapacitors.”