Part of the ABC transporter complex FbpABC (TC 3.A.1.10.1) involved in Fe(3+) ions import. This protein specifically binds Fe(3+) and is involved in its transmembrane transport (By similarity). The complex is composed of two ATP-binding proteins (FbpC), two transmembrane proteins (FbpB) and a solute-binding protein (FbpA). Belongs to the bacterial solute-binding protein 1 family.