"Total Current Density" is the sum of the electric current density and the displacement current density.
Applicable units are those of quantitykind:TotalCurrentDensity
http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=31891
"Total Current Density" is the sum of the electric current density and the displacement current density.
$J_{tot}= J + J_D$, where $J$ is electric current density and $J_D$ is displacement current density.