Suitable common mode chokes: TDR 3-12xx : see stock number ; 745-1180 745-1180 TDR 3-24xx : see stock number ; 745-1200 745-1200 TDR 3-48xx : see stock number ; 745-1171 745-1171. 3. Traco 3W DIP Single/Dual Output Regulated Isolated DC-DC Converter - TDR 3WI Series. Compact design in DIP package Wide 4:1 input voltage range Fully regulated outputs No minimum load required I/O-isolation 1500 Vdc Operating temperature range –40 °C to +85 °C Short circuit protection Remote On/Off