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This power-conditioning device addresses problems caused by unstable electrical supply. "The increasing number of connected devices can lead to more frequent fluctuations in current and voltage," and solar installations may introduce DC components that cause transformer noise. The PF-3 adds an integrated DC blocker and automatic overload protection to the PF-2's filtering, handling up to 2200W with dedicated outlets for digital and analogue components. Dimensions 173 x 82 x 346mm, weight 2.8kg.