A microchannel evaporator with relatively densely spaced thin fins has been developed for domestic refrigerators. Experimental test results in an 18 cubic foot (510 liter) top mount refrigerator produced equivalent performance to that of the original fin-tube evaporator. The prototype evaporator constructed with copper microchannel tubing and copper fin stock has an equivalent mass to the original aluminum tube-fin evaporator it replaced. The microchannel evaporator was found to reduce the refrigerator's refrigerant charge by 60% of the original refrigerant charge. Frost studies indicate good performance with more than 200 grams of accumulated frost. Test results showing the refrigerator's performance at low, medium and high ambient temperatures, varying refrigerant charge levels and the effect of frost are included in the presentation.