Temperature-dependent magnetodielectric, magnetoimpedance, and magnetic field controlled dielectric relaxation response in KBiFe2O5

•KBiFe2O5 (KBFO) is prepared via a solid-state reaction route and crystallizes in the monoclinic phase (P2/c).•The observed magnetodielectric (MD) coupling suggests that Inverse Dzyaloshinskii-Moriya interaction could be the origin.•The maximum MD and magnetoimpedance (MI) couplings measured at room temperature are −0.6% and 0.7%, respectively.•The capacitive MI effect suggests that the observed MD in KBFO is intrinsic.