The IRS-3.3/15-Q48NF-C from Murata is a DC to DC Converter with Input Voltage 18 to 75 V, Output Voltage 1 3.3 V, Output Current 1 15000 mA, Output Power 49.5 W, Isolation Voltage 2250 V. Tags: Through Hole, Buck/Step down. More details for IRS-3.3/15-Q48NF-C can be seen below.