The invention relates to a
hybrid circuit breaker comprising: a current path (801) including a mechanical switch (805) adapted to have a closed and an open configuration, and a switching path (802) disposed in parallel with the main current path (801) and including a
solid-state static switch (806), and wherein the mechanical switch (801) includes a first contact (2), a second contact (3), a first actuation
assembly carrying the first contact (2) and including a first piezoelectric
actuator (4), a second actuation
assembly carrying the second contact (3) and including a second piezoelectric
actuator (5), each of the first piezoelectric
actuator (4) and the second piezoelectric actuator (5) being configured to deform, particularly under the effect of a change in
electric field, along a deformation direction (D) substantially collinear with a longitudinal axis (X1,X2) of the piezoelectric actuator (4, 5), between a retracted state and an extended state. Figure for the abbreviation: Figure 1,