The MGS15123R3 from Cosel is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 3.3 V, Output Current 1 4 A, Output Power 13200 mW, Isolation Voltage 1500 Vdc. Tags: Through Hole, Buck/Step down. More details for MGS15123R3 can be seen below.