The 36F0503S-2WR2 from Ideal Power Ltd is a DC to DC Converter with Input Voltage 4.5 to 5. 5 V, Output Voltage 1 3.3 V, Output Current 1 40 to 400 mA, Output Power 2000 mW, Isolation Voltage 3000 V. Tags: Through Hole, Buck/Step down. More details for 36F0503S-2WR2 can be seen below.