The SDH03-12S3P3W from Ideal Power Ltd is a DC to DC Converter with Input Voltage 4.5 to 18 V, Output Voltage 1 3.3 V, Output Current 1 700 mA, Isolation Voltage 1600 V, Operating Temperature -40 to 105 ºC. Tags: Through Hole, Buck/Step down. More details for SDH03-12S3P3W can be seen below.