The high temperature 30A SQE48 series of DC-DC converters provides a high efficiency single output, in a 1/8th brick package that is only 62 percent the size of the industry-standard quarter-brick. Specifically designed for operation in systems that have limited airflow and increased ambient temperatures, the SQE48T30 converters utilize the same pinout and functionality of the industry standard quarter-bricks. The 30 A SQE48 series converters provide thermal performance in high temperature environments that exceeds most competitors 30A quarter-bricks. This performance is accomplished through the use of patented/patent-pending circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100 percent automation for assembly, coupled with advanced electronic circuits and thermal design, results in a product with extremely high reliability.