Solid-state switching devices of solid-state DC circuit breakers serve dual functions of conducting and interrupting currents. The interruption process leads to changes in the device junction temperature, which results in the superposition of the operating junction temperature and the transient interruption junction temperature, potentially causing the device junction temperature to exceed the maximum allowable value and resulting in a fault. The impact of junction temperature changes during the interruption process is a problem that researchers often overlook. The low-voltage DC distribution network has a complex structure, and the interruption characteristics of solid-state circuit breakers vary across different current circuits. In particular, the energy dissipation capacity of the MOV in the energy dissipation branch and the differences between junction temperature changes of power electronic devices have a significant impact on technical evaluations such as the selection of circuit breaker technical parameters. This paper targets solid-state circuit breakers used in low-voltage DC power distribution systems. It combines aspects such as the circuit breaker’s topology structure, breaking principles, protection action strategies, interruption principles, and experimental analysis to study the interruption characteristics of solid-state DC circuit breakers in various system circuits. The research findings can provide technical support for the application of low-voltage solid-state DC circuit breakers.