The equilibrium current states in superconducting junctions of the superconductor-insulator-superconductor (SIS) type were studied for arbitrary transparency of the dielectric layer and in the presence of nonmagnetic impurities of arbitrary concentration. As the study was carried out at temperatures close to critical, the Ginzburg–Landau theory was applied. The calculations were performed taking into account depairing effects, the presence of which in the system is reflected by the superfluid velocity term in the Ginzburg–Landau equation. In addition to the numerical results presented in the work, a new analytical equation for the dependence of the current on the phase difference was obtained for arbitrary electron transmittance and different values of the electron mean free path. It was shown that the analytical results are in good agreement with the numerical calculations.