Tracopower dcdc converters tsr 3 series tracopower tsr 3 1250 the tracopower tsr 3 1250 is a 3a dcdc converter from the tsr 3 series this converter is a non isolated step down switching regulator that can also be operated with a negative output voltagethe converter is supplied in a very compact open frame package of 155 x 94 x 62mm the high efficiency of up to 95 admits a full load operation up to 50degc and up to 85degc with 50 current reduction it also has a low standby curr