The ability to model features that are small relative to the cell size is often important in electromagnetic simulations. In this talk we discuss subcell models for thin wires and thin slots in the finite-element time-domain (FETD) method. The current along the wires is described by a modified telegraphers equation and for the slots a dual equation for the magnetic current is used. Therefore, a unified approach for modeling thin wires and thin slots is possible. The proposed fully-discrete method is provably unconditionally stable and its accuracy is demonstrated for several antenna and EMC examples.