A stationary contact assembly comprising: a stationary contact body ; a stationary contact point placed on the stationary contact body ; and an arc-guiding member fixed on the stationary contact body and comprising an arc guiding portion , the arc guiding portion comprising a first end (A) and a second end (B) opposite to each other, the first end (A) being close to the stationary contact point , a direction from the first end (A) to the second end (B) defining a main movement direction (F) of arc, the arc guiding portion of the arc-guiding member comprising an arc-guiding section at the first end (A), the arc-guiding section being adapted to guide the arc away from the stationary contact point into the arc guiding portion , and the stationary contact point being close to or in contact with the arc-guiding section , so that the arc may directly leave the stationary contact point in the main movement direction (F) of the arc, wherein the arc-guiding member further comprises a mounting portion adapted to fix the arc-guiding member onto the stationary contact body , and the mounting portion is connected to the arc guiding portion , an opening is formed at the connection of the mounting portion and the arc guiding portion , and the opening is adapted to allow the stationary contact body to pass therethrough so that the stationary contact point is close to the arc-guiding section at the opening , characterized in that the mounting portion is formed with a support platform on a side adjacent to the opening , and the support platform is formed by an edge of the opening and supports the stationary contact body at the opening to prevent deformation of the stationary contact body during an arc ablation. a stationary contact body ; a stationary contact point placed on the stationary contact body ; and an arc-guiding member fixed on the stationary contact body and comprising an arc guiding portion , the arc guiding portion comprising a first end (A) and a second end (B) opposite to each other, the first end (A) being close to the stationary contact point , a direction from the first end (A) to the second end (B) defining a main movement direction (F) of arc, the arc guiding portion of the arc-guiding member comprising an arc-guiding section at the first end (A), the arc-guiding section being adapted to guide the arc away from the stationary contact point into the arc guiding portion , and the stationary contact point being close to or in contact with the arc-guiding section , so that the arc may directly leave the stationary contact point in the main movement direction (F) of the arc, wherein the arc-guiding member further comprises a mounting portion adapted to fix the arc-guiding member onto the stationary contact body , and the mounting portion is connected to the arc guiding portion , an opening is formed at the connection of the mounting portion and the arc guiding portion , and the opening is adapted to allow the stationary contact body to pass therethrough so that the stationary contact point is close to the arc-guiding section at the opening , characterized in that the mounting portion is formed with a support platform on a side adjacent to the opening , and the support platform is formed by an edge of the opening and supports the stationary contact body at the opening to prevent deformation of the stationary contact body during an arc ablation. <EOS>