Recent awareness of global warming has prompted the connection of numerous distributed generators, such as cogeneration systems and wind turbine generators, to the existing power grid, sometimes causing significant increase in short-circuit currents. Introduction of a fault current limiter (FCL) is considered an attractive countermeasure to such increased short-circuit currents. We have developed 500 V/200 A superconducting FCL modules using large high-temperature superconducting (HTS) thin films with high-resistivity Au-Ag alloy shunt layers, which can withstand high electric fields (E > 30 V/cm). Two HTS thin films on sapphire substrates (2.7 cm × 20 cm), prepared with a metal organic decomposition method, were used to fabricate such FCL modules. Switching tests using a short-circuit generator confirmed good current limiting properties. The required length of expensive HTS thin films has become less than one-fourth of that for conventional thin-film FCL modules that use gold shunt layers. It is expected that compact and low-loss thin-film FCLs can be realized with much reduced costs.