Tracopower tmr 3 series 3w dc dc converters tracopower tmr 3 1222 the tracopower tmr 3 series offers insulated regulated 3w dc dc converters with a wide 21 input range supplied in an ultra compact sil 8 housing these converters are suitable for a number of applications in telecommunications industrial and communication systems where space is a critical factor tracopower tmr 3 1222 3w dc dc converter 9 18v dc in 12v dc 125ma out