In this study, we conduct a pulse test on the 10-kV-class thyristor to evaluate its on-state characteristics under high-current conditions. The pulse test involves gradually increasing the peak current in an LC resonant circuit formed by the thyristor and a charged capacitor. Results show that the thyristor withstands currents up to 157 A without breakdown, demonstrating its capability to energize large currents on the order of 1 kA/cm2. From he locus current–voltage characteristics obtained from the high-current pulse test waveforms, energization with an order of magnitude of 1 kA/cm2 has a small voltage drop of less than 20 V.