This rugged, industrial quality AC-DC power supply with active power factor corrected input utilizes field proven technology to generate the required output power. The system is built with six PFH 65 internal modules, which are connected parallel via internal redundancy diodes. This modular construction also provides inherent redundancy; the failure of one internal module only causes a reduction in output power while the system remains operational. The input and output are filtered for low noise. High quality built-in fans provide sufficient airflow for operation within the specified temperature range without de-rating. The fans draw air into the unit, and exhaust at the terminal side of the unit. All heat generating components are installed on aluminum heatsink blocks which are thermally connected to the base plate. This also ensures exceptional mechanical ruggedness. Conformal coating provides protection against humidity and airborne contaminants. Full electronic protection, low component count, large design headroom, and the exclusive use of components with established reliability contribute to a high MTBF. The unit is manufactured at our plant under strict quality control. Several units can be connected parallel for higher output power.