The invention relates to the dielectric composition on the basis of barium titanate (BaTiO₃) that is present with Ba(Zn_1/3Nb_2/3)O₃ in a perovslite structure, which dielectric composition exhibits an average grain size d₅₀ in the range of 0.2 m to 0.5 m and a crystallite size d₁₀ below 0.3 m.