Embodiments provide an electronic circuit breaker. The electronic circuit breaker has a moveable contact arm having a moveable main electrical contact, and a lockout mechanism operable to contact the moveable contact arm and block motion of thereof, the lockout mechanism having a lockout latch with one or more pivot joints, a moveable stop, and an offset engagement portion, the moveable stop adapted to contact the moveable contact arm, and an unlock actuator providing an unlock force at the engagement portion causing lockout latch pivoting and release of the moveable contact arm. Also disclosed are secondary electrical contacts configured to engage each other in the ON configuration, with a leaf spring operably supporting a moveable one of the secondary contacts, the leaf spring configured to be flexed to close the secondary contacts. A method of operating the electronic circuit breaker is provided, as are other aspects.