Ferritic stainless steel interconnect at a high temperature and a prolonged operating time is exposed to severe conditions, such as the overgrowth of chromium oxide layer on an interconnect and cathode chromium poisoning due to chromium oxide migration. In this study, a protective Ba0.5Sr0.5Co0.8Fe0.2O3−δ-Sm0.2Ce0.8O1.9 carbonate (BSCF-SDCC) perovskite coating was developed on SUS 430 stainless steel through electrophoretic deposition and subsequently sintering to overcome these problems. BSCF-SDCC coating layer was sintered from 550 °C to 750 °C and examined in terms of its crystalline phase, carbonate bonding and microstructure. Area specific resistance (ASR) was tested at each sintering temperature of BSCF-SDCC coating by using a two-probe DC technique during oxidation at 600 °C. Afterwards, the microstructure was analyzed to ensure the endurance of coating characteristics and determine chromium diffusion during oxidation. Carbonate bonding in BSCF-SDCC decreased when sintering temperature increased. The microstructure of the BSCF-SDCC coating sintered at 550°C-650 °C was uniform and dense, but a crack was observed in the coating sintered at 700 °C and 750 °C. The crystalline phase of BSCF-SDCC was verified except the coating sintered at 750 °C, indicating the secondary phase formation of BaCO3. After 500 h of oxidation, the BSCF-SDCC coating sintered at 550°C-650 °C was achieved below the required 0.1 Ωcm2, whereas the coating sintered at 600 °C exhibited the lowest ASR of 0.073 Ωcm2. The coating microstructure remained dense, compact and uniform after thermal oxidation. Therefore, a protective BSCF-SDCC coating for interconnects was successfully developed at low temperatures (400°C-600 °C).