An arrangement for mechanical and electrical contacting of an incandescent wire of a thermal radiation source, comprising an incandescent wire made of refractory metal having at least one flat connection surface to be contacted, a contact surface on which the incandescent wire is contacted and a contacting medium which joins the incandescent wire to the contact surface, wherein the flat connection surface of the incandescent wire has at least two perforations and/or a circumferential edge of the connection surface of the incandescent wire has at least two cutouts, wherein the contacting medium is joined to the contact surface with an atomic-level join at the site of the perforations and/or cutouts and through a flange-like configuration of the contacting medium above the connection surface of the incandescent wire at the site of the perforations, and/or cutouts forms both an electrical and a mechanical connection with the incandescent wire.