The study investigates the current-carrying characteristics of the new superconductor MgB₂, particularly in polycrystalline forms. Despite its high transition temperature (39 K), MgB₂ exhibits good temperature scaling of the flux pinning force, suggesting that current density is determined by flux pinning rather than weak coupling across grain boundaries. The samples, synthesized through a direct reaction of Mg flakes and amorphous B powder, show no significant anisotropy or texture, indicating that the superconducting properties are uniform throughout. Magnetization measurements reveal a large hysteresis characteristic of bulk currents, with the upper critical field (Hc2) varying more slowly than predicted by the Werthamer-Helfand-Hohenberg model. The flux-pinning characteristics follow a Kramer-like function, indicating a linear relationship between current density and magnetic field. The microstructure analysis using magneto-optical and scanning electron microscopy shows extensive inhomogeneity, with strong superconducting regions of various sizes and phases. These findings suggest that MgB₂ is more similar to low-temperature metallic superconductors than high-temperature cuprate superconductors, with the potential for high current densities over large lengths without the need for high texture levels.The study investigates the current-carrying characteristics of the new superconductor MgB₂, particularly in polycrystalline forms. Despite its high transition temperature (39 K), MgB₂ exhibits good temperature scaling of the flux pinning force, suggesting that current density is determined by flux pinning rather than weak coupling across grain boundaries. The samples, synthesized through a direct reaction of Mg flakes and amorphous B powder, show no significant anisotropy or texture, indicating that the superconducting properties are uniform throughout. Magnetization measurements reveal a large hysteresis characteristic of bulk currents, with the upper critical field (Hc2) varying more slowly than predicted by the Werthamer-Helfand-Hohenberg model. The flux-pinning characteristics follow a Kramer-like function, indicating a linear relationship between current density and magnetic field. The microstructure analysis using magneto-optical and scanning electron microscopy shows extensive inhomogeneity, with strong superconducting regions of various sizes and phases. These findings suggest that MgB₂ is more similar to low-temperature metallic superconductors than high-temperature cuprate superconductors, with the potential for high current densities over large lengths without the need for high texture levels.