WT83 - High Capacitance wet tantalum
Capacitance values have been strongly increased with Exxelia's new range of tantalum capacitors:
WT83 is an extension of the ST79 families (according to CLR93 MIL values) but with double the capacitance. That is a pass for impactful miniaturization of existing designs by playing on both size and weight (for instance, WT83 offers 470µf 100V in a D size, whereas ST79 only gives 220µF in the same other conditions).