2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207540The Higgs sector of the minimal 3 - 3 - 1 model with three triplets and one sextet is investigated in detail under the most general lepton--number conserving potential. The mass spectra and multiplet decompostion structure are explicitly given in a systematic order and a transparent way allowing they to be easily checked and used in further investigations. A previously arising problem of inconsistent signs of f_{2} is also automatically solved.Latex, 22 pages, no figures, to be published in Int. J. Mod. Phys. AHigh Energy Physics - Phenomenologytext