DC-DC converters are made in stable steel cases and it has a high efficiency that can reach 90%. It is galvanically isolated and tested with a voltage of 4000VDC. The burn-in test with 100% load provides a high reliability in using the device. All units are cooled using a free air convection while High Wattage class are cooled by forced air with a built-in DC fan. With its 2:1 wide input voltage range, it can be of used for many applications.