Traco SMD 2 Watt DC-DC Converters - TMR 2WISM Series. From TRACO POWER, a range of 2 W SMD DC-DC converters. The TMR 2 series have an ultra-wide 4:1 input and fully regulated outputs. Supplied in a compact SMD package the DC—DC converters are perfect for applications where valuable board space is limited. Capable of operating up to 70°C environment temperature at full load or up to 80°C with a 50% load derating. Features and Benefits. I/O-isolation 1 ‘500 V dc Ultra-wide 4:1 Input 4.5 V dc to 12 V dc, 9 V dc to 36 V dc and 18 V dc to 75 V dc -40°C to +80°C operating temperature range Fully regulated outputs Remote On/Off. Applications. Communication equipment Instrumentation Industrial electronics