An electrical switch comprises at least one fixed contact (100, 200), a movable contact being movable between a closed position in which the movable contact makes contact to the fixed contact (100, 200) and an open position in which the movable contact is electrically isolated from the fixed contact (100, 200),at least one shutter element (410, 420) being movable in synchronism with the movable contact between an extended position in which the shutter element (410, 420) is positioned between the fixed contact (100, 200) and the movable contact when the movable contact is in the open position, and a contracted position in which the shutter element (410, 420) is positioned outside the patch of the movable contact allowing the movable contact to turn from the open position to the closed position, wherein the movable contact is enclosed in a housing comprising two opposite side panels (10E, 10F) and four side walls (10A, 10B, 10C, 10D) connecting peripheral edges of the side panels (10E, 10F), a connection portion of a first fixed contact passing through a first side wall and a connection portion of a second fixed contact passing through a second side wall being opposite to and spaced apart from the first side wall in a longitudinal direction (Y-Y) of the housing, characterized in that the movable contact is supported on a rotatable roller and the roller is rotatably supported in the side panels (10E, 10F) of the housing, wherein an inner end (411, 421) of the shutter element (410, 420) is supported with an articulated joint (J10, J20) on the roller, and wherein an outer end (412, 422) of the shutter element (410, 420) is positioned in guide grooves (17A, 17B) formed in the side panels (10E, 10F) of the housing. at least one fixed contact (100, 200), a movable contact being movable between a closed position in which the movable contact makes contact to the fixed contact (100, 200) and an open position in which the movable contact is electrically isolated from the fixed contact (100, 200),at least one shutter element (410, 420) being movable in synchronism with the movable contact between an extended position in which the shutter element (410, 420) is positioned between the fixed contact (100, 200) and the movable contact when the movable contact is in the open position, and a contracted position in which the shutter element (410, 420) is positioned outside the patch of the movable contact allowing the movable contact to turn from the open position to the closed position, wherein the movable contact is enclosed in a housing comprising two opposite side panels (10E, 10F) and four side walls (10A, 10B, 10C, 10D) connecting peripheral edges of the side panels (10E, 10F), a connection portion of a first fixed contact passing through a first side wall and a connection portion of a second fixed contact passing through a second side wall being opposite to and spaced apart from the first side wall in a longitudinal direction (Y-Y) of the housing, characterized in that the movable contact is supported on a rotatable roller and the roller is rotatably supported in the side panels (10E, 10F) of the housing, wherein an inner end (411, 421) of the shutter element (410, 420) is supported with an articulated joint (J10, J20) on the roller, and wherein an outer end (412, 422) of the shutter element (410, 420) is positioned in guide grooves (17A, 17B) formed in the side panels (10E, 10F) of the housing.