The TSD-25A-12 from Technology Dynamics is a DC to DC Converter with Input Voltage 9 to 18 V, Output Voltage 1 12 V, Output Current 1 2.1 A, Output Power 25 W, Operating Temperature 0 to 55 Degree C. Tags: Rack mount, Buck-Boost. More details for TSD-25A-12 can be seen below.