A heat transfer composition comprising: (i) from about 10 to about 95% by weight of trans-1,3,3,3-tetrafluoropropene (R-1234ze (E)); (ii) from about 2 to about 30% by weight of carbon dioxide (R-744); and (iii) from about 3 to about 60% by weight of a third component comprising fluoroethane (R-161).Una composición de transferencia de calor que comprende: (i) del 10 aproximadamente al 95 % en peso aproximadamente de trans-1,3,3,3-tetrafluoropropeno (R-1234ze (E)); (ii) del 2 aproximadamente al 30 % en peso aproximadamente de dióxido de carbono (R-744); y (iii) del 3 aproximadamente al 60 % en peso aproximadamente de un tercer componente que comprende fluoroetano (R-161).