Tracopower thd 15 series 15w dc dc converters tracopower thd 15 2423 the thd 15 series from tracopower offers high performance 15w dc dc converters in an encapsulated 254 x 254 x 10mm package occupying 50 less pcb space than similar converters they have a wide 21 input range and precisely regulated isolated output voltages tracopower thd 15 2423 15w dc dc converter 18 36v dc in 15v dc 500ma out