The SMHF423R3S from Crane Aerospace & Electronics is a DC to DC Converter with Input Voltage 35 to 55 V, Output Voltage 1 3.2 to 3.4 V, Output Current 1 2.4 A, Output Power 0 to 8 W, Power Consumption 5 to 8 W (Dissipation). Tags: Surface Mount. More details for SMHF423R3S can be seen below.