Tracopower tmr 3wi series 3w dc dc converters tracopower tmr 3 2421wi the tmr 3wi 3 series from tracopower offers insulated regulated 3w dc dc converters with an extended 41 input range these modules are supplied in a compact sil 8 plastic casing and are ideal for a number of applications where space is critical tracopower tmr 3 2421wi 3w dc dc converter 9 36v dc in 5v dc 300ma out