The SUS01O-09 from Mean Well is a DC to DC Converter with Input Voltage 43.2 to 52.8 V, Output Voltage 1 9 V, Output Current 1 0 to 111 mA, Output Power 1000 mW, Operating Temperature -25 to 71 Degree C. Tags: Through Hole, Buck/Step down. More details for SUS01O-09 can be seen below.