In the framework of H2020, the EuroCirCol program has the outcome of producing a conceptual design of the FCC within 2019. One of the main targets is designing a superconducting magnetic dipole able to reach 16 T, in order to bend the beams within energy and size constraints. This magnetic field can be achieved using Nb3Sn conductors at their highest performances.
Here we present the 2D magnetic conceptual design and the quench protection of the costheta dipole configuration. The work shows that it is possible to design a magnet able to produce 16 T with accelerator field quality, working at 86% of the load-line at a temperature of 1.9 K, using a reasonable amount of conductor. Moreover, it is possible to keep the temperature below 350 K with realistic assumptions on the quench protection system.