The QmaXTM Series of high current single output DC-DC converters from Power Bel Solutions sets new standards for thermal performance and power density in the quarter brick package. The 40A QM48S converters of the QmaXTM Series provide thermal performance in high temperature environments that is comparable to or exceeds the industry's leading 40A half bricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal management and a very low body profile. The QM48S40 converters have a power density of up to 130 W/in3, more than twice that of competitors' 40A half bricks. Over 1 square inch of board space can be saved for every slot in which a 40A half brick is replaced with a QM48S40 converter from Power Bel Solutions. Low body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for downstream devices. The use of 100% automation for assembly, coupled with Power Bel Solutions advanced electric and thermal design, results in a product with extremely high reliability. Operating from a 36-75 V input, the QmaXTM Series converters provide standard output voltage for 3.3 V. Output can be trimmed from -20% to +10% of the nominal output voltage, thus providing outstanding design flexibility.