The PDSE1-S5-S3-D from CUI is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 3.3 V, Output Current 1 303 mA, Output Power 1000 mW, Isolation Voltage 3000 VDC. Tags: Through Hole, Buck/Step down. More details for PDSE1-S5-S3-D can be seen below.