The invention relates to a capacitive block, notably for an electrical equipment, comprising a case, a capacitive element housed in the case, a substance filling the space between the case and the capacitive element so as to ensure leak tightness of the capacitive element, a heat sink against which the capacitive element is in direct contact. In the capacitive block, the heat sink is different from the filling substance, a face of said heat sink, designated free face, forming an outer face of the capacitive block and being devoid of said filling substance.