We present a detailed investigation on the magnetodielectric properties of Fe ₂ OBO ₃ , where we have found a magnetodielectric effect around 150% at room temperature and ν=2 kHz , that cannot solely arise from magnetoresistive extrinsic contributions. In addition, we find a crossover of the magnetodielectric response around T _N , that we attribute to changes in the electronic microstructure of this compound that take place at that temperature. For T < T _N the dielectric constant experiences a jump at a temperature dependent critical field that we relate to a partial melting of the charge ordering state.