The MRA28S from Pico Electronics is a DC to DC Converter with Input Voltage 18 to 36 V, Output Voltage 1 28 V, Output Current 1 0.01 to 0.09 A, Output Power 2500 mW, Operating Temperature -55 to 85 Degree C. Tags: Through Hole, Buck-Boost. More details for MRA28S can be seen below.