The 3813-S12 from Modular Devices is a DC to DC Converter with Input Voltage 18 to 50 V, Output Voltage 1 11.8 to 12.2 V, Output Current 1 0.15 to 1.5 A, Output Power 18000 mW, Isolation Voltage 500 Vdc. Tags: Through Hole. More details for 3813-S12 can be seen below.