Circuit breakers are essential part of any power grid and have the fundamental task of closing electric circuit and carrying current under normal operating conditions, as well as interrupting current under abnormal operating conditions. On the vessels with HV power grid, the AC current prevails and so does the use of electro-mechanical circuit breakers. During the contact separation, the electric arc is being formed and SF6 gas or vacuum is used for its quenching. Achieving the low environmental footprint while maximizing vessel’s economic efficiency has led to reinvention of DC current. One of the challenges is absence of adequate circuit breakers. Mechanical DC and hybrid breakers are unable to overcome requirement of ultra-fast switching and the solution has been found in the semiconductor technology. Research has led to first type tested solid state DC circuit breakers for LV applications in the year 2019. while for the HV applications, the breakers are still in research and their application is anticipated in the near future.