Abstract: Disclosed is a non-consumable electrode for arc processes, comprising a housing made of a heat and electrically conductive material and having an interior to supply a cooling liquid thereinto, a yoke made of a heat and electrically conductive material, fixed on said housing and having an interior to supply a cooling liquid therein, an active insert rigidly fixed in said yoke and formed as a truncated cone whose minor base faces the portion whereon an electrode drop region of an electric arc rests and whose major base faces the cooling interior and has a recess therein shaped as a spherical segment.