[en] Dielectric spectroscopy has been applied to investigate the electrical properties of tungsten bronze ferroelectric ceramics of Pb_0.77K_0.115Sm_0.115Nb₂O₆ (Sm:PKN) over a wide frequency (45 Hz to 5 MHz) and temperature (35-600 deg. C) range. XRD analysis showed the lattice parameters, a = 17.731 A, b = 18.035 A and c = 3.843 A. Determined the piezoelectric constants, K_p = 18%, K_t = 21%, d₃₃ = 68, and quality factor (Q_m) = 38, reveals the material may be useful for transducer applications. Similar peak positions of normalized electrical modulus and impedance plots indicate the long range conductivity in Sm:PKN. Cole-Cole plots observed to be non-Debye type with polydispersive in nature. Determined the coefficient A(T) = {a(T)S/L}, the exponent n(T) fitted the Jonscher's dielectric dispersion relations for ε^I with experimental data. Parameters n(T) and A(T) showed an anomaly at the vicinity of T_C, respectively. dc and ac conduction activation energies are estimated from Arrhenius plots. Compared the results from different techniques, and discussed the conduction mechanism in the material