The TSRN 1-2490A from Traco Power is a DC to DC Converter with Input Voltage 10.5 to 36 V, Output Voltage 1 9 V, Output Current 1 1 A, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 125 Degree C. Tags: Through Hole, Buck/Step down. More details for TSRN 1-2490A can be seen below.