Microwave assisted solution method was used to synthesize pristine and Iron (Fe) doped Cassiterite (SnO2) nanoparticles. The effect of iron doping was characterized for the optimization of principal parameters of Cassiterite. The tetragonal structure of Cassisterite was confirmed through PXRD spectra. The particle size was calculated using Debye Scherrer formula and attains at nanometer range. The SEM image and EDX depicts the spherical structure and the composition of the elements of the synthesized nanoparticles. The optical band gap value is determined for the synthesized nanoparticle through the Tauc plot using Diffuse Reflectance Spectra. The specific capacitance value reveals the enhancement of electrical properties of Cassiterite through iron doping