ABSOPULSE Electronics Ltd. 1000W, High Reliability, Convection Cooled, Industrial Quality DC/DC Converter BHR 65X2-4U2NF (Opto-less)

No optocouplers, low component count Cooling by convection only (no fans or forced air) Rugged construction Conformal coating High input/output isolation Full electronic protection Customized versions available 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 two BHR 65 modules connected redundant parallel. Each internal module generates 500W. This modular construction provides inherent redundancy; the failure of one internal module would cause a 50% drop in output power while the unit remains functional at 500W. Therefore, this design can also be used as a 500W redundant power supply. A +/- dual output configuration is also possible. The mechanical construction has no internal wiring, which increases withstand capacity for vibration and contributes to long-term reliability. In addition, the internal boards are conformal coated for immunity to humidity and contamination. All heat generating components are installed on aluminum heat-sink blocks which are thermally coupled to the heatsink fins and cooled by natural convection. Heatsink fins are installed on the side of the unit and internally for efficient cooling. The input and output are filtered for low noise. Full electronic protection eliminates failure due to abnormal operating conditions, including application errors. Large design headrooms and the use of components with established reliability also contribute to the long operating life of the unit. An EN50155 compliant railway quality version of this design, the BHR 65X2R-4U2NF, is also available.