electrosurgical device comprising: a set of jaws (30) arranged opposite distally relative to a shaft (20), the jaw assembly a first jaw (40, 180) and a second jaw (80, 140), each jaw comprising a surface tissue engaging with at least one bipolar electrode disposed therein, the jaw assembly configured to deliver radiofrequency energy to a target tissue being, wherein the set of jaws, when closed, has a diameter no greater to about 5 mm, and wherein the shaft has a diameter no greater than about 5 mm and a mechanism (101) pinless rotation comprising features joint action on rotation of the first jaw and the second jaw connecting the jaws to each other and allow the jaw assembly to pivot between an open position and a closed position, in the mechanism pinless rotation creates a common center of rotation that is not necessarily located at a point on a position corresponding to a central longitudinal axis of the shaft line, characterized in that: the set of two opposing jaws is configured so that when the assembly jaw is moved from the open to the closed position, a mutual contact between the two jaws at a distal end of each jaw and) occurs the first jaw comprises two parts, one part (150) proximal pivot relative to the shaft and a distal piece (106) pivotally connected to the proximal part, wherein the second jaw (140) is unitary and is fixed relative to the shaft, or b) the first jaw (40) comprises a proximal part (50) fixed to the shaft, a part (60) of the distal jaw pivot and an assembly (75) pivotally connecting piece (50 ) and proximal part (60) of the distal jaw, wherein the second jaw (80) is unitary and is pivotable relative to the shaft.Dispositivo electroquirúrgico que comprende: un conjunto de mordazas (30) opuestas dispuestas distalmente con respecto a un árbol (20), comprendiendo el conjunto de mordazas una primera mordaza (40, 180) y una segunda mordaza (80, 140), comprendiendo cada mordaza una superficie de acoplamiento al tejido con al menos un electrodo
