The SDR Series are power supplies delivering reliable 120-480W output power. Housed in compact metal case with DINrail clip, it takes special account of the mechanical robustness, electromagnetic compatibility and thermal characteristics to exhibit the required strengths to work satisfactorily in harsh environment where it will be exposed. Its highly efficient and stable output power has the capability to support 150% of peak load. The AC/DC rectifier operates over the full range of AC input voltage to fit worldwide power grids. The included active Power Factor Correction circuit (PFC) reduces energy costs by eliminating reactive power and harmonics from power lines. Besides the increment of efficiency, PFC is to comply with international regulations, which established limits on harmonic currents that can appear on the AC main line.