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500W 12V 42A Fan Cooled Enclosed AC DC Switching Power Supply for Industrial Equipment. 500W enclosed AC/DC switching power supply provides a stable 12VDC high-current output for industrial equipment, automation systems and electronic applications. Integrated cooling fan, metal enclosure and ventilation structure support active heat dissipation during continuous high-power operation. Multi-position screw terminal connection, adjustable DC output and built-in protection design make the power supply convenient for industrial equipment integration and OEM applications.