This rugged, industrial quality DC-DC converter is designed for a long operating life. By eliminating optocouplers in the feedback loop, the MTBF of the unit is greatly improved over conventional designs. The converter is built with three BHR 65 internal modules which are connected in parallel via redundancy diodes. 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, which exhausts at the terminal side of the unit. All heat generating components are installed on aluminum heatsink blocks which are thermally connected to the internal heatsink plate. This also ensures exceptional mechanical ruggedness. Conformal coating provides protection against humidity and airborne contaminants. Full electronic protection, large design headroom and the use of components with established reliability also contribute to the long operating life of the unit. Customized versions are available. The unit is manufactured at our plant under strict quality control.