  We study numerically the voltage-induced breakdown of a Mott insulating phase
in a system of charged classical particles with long-range interactions. At
half-filling on a square lattice this system exhibits Mott localization in the
form of a checkerboard pattern. We find universal scaling behavior of the
current at the dynamic Mott insulator-metal transition and calculate scaling
exponents corresponding to the transition. Our results are in agreement, up to
a difference in universality class, with recent experimental evidence of
dynamic Mott transition in a system of interacting superconducting vortices.
