In this study, we explore the impact of the spark plasma sintering densification process on the physical, structural, microstructural, dielectric, and optical properties of the PLMN-13PT ceramic system. A high relative density was achieved, and the microstructural and structural properties are suitable for constructing electronic devices. We compared the properties obtained in this work with those reported in the literature for the same system, and found that the differences in the results can be primarily attributed to compositional variations in the samples obtained here. This is likely due to the short time required for densification when using spark plasma sintering, which avoids diffusion and homogenization of the system while also inhibiting grain growth. Besides, these results offer promising possibilities for miniaturizing ceramic systems used in the electronics industry.