  Motivated by the fully gapped superconductivity in iron-based superconductors
with uncompensated electron pockets, we propose a spin singlet, but orbital
triplet analogue of the superfluid phase of He-3B. We show that orbital
triplets with a nominal d-wave symmetry at the iron sites can transform as
s-wave pairs under rotations about the selenium sites. Linear combinations of
such d$_{xy}$ and d$_{x^{2}-y^{2}}$ triplets form a fully gapped, topological
superconductor. Raman-active excitations are predicted to develop below the
superconducting transition temperature.
