  We investigate the reduction of a general TeV-scale supersymmetric extra U(1)
model to a 2HDM below the TeV- scale through the tree level non-decoupling.
Portions of the parameter space of the extra U(1) model appropriate for
obtaining a 2HDM are identified. Various properties of the resulting 2HDM are
connected to the parameter space of the underlying model. PACS: 12.60.Jv,
12.60.Cn, 12.60.Fr
