polycarbonate polysiloxane 15 to 25 weight percent of the poly alkylene terephthalate 20 to 35 weight percent of the block polyestercarbonate and 5 to 12 weight percent of the organophosphate ester embodiment 14 an article comprising a composition comprising based on the total weight of the composition 5 to 50 weight percent of an aromatic polycarbonate 10 to 40 weight percent of a block polycarbonate polysiloxane 5 to 35 weight percent of a poly alkylene terephthalate 5 to 50 weight percent of a block polyestercarbonate comprising a polyester block comprising resorcinol ester repeat units having the structure and a polycarbonate block comprising carbonate repeat units having the structure wherein at least 60 percent of the total number of r 1 groups are aromatic and 4 to 20 weight percent of an organophosphate ester embodiment 15 the article of embodiment 14 wherein the article is selected from a component of a household appliance a component of office equipment and a component of a consumer electronic device embodiment 16 the article of embodiment 14 or 15 wherein the aromatic polycarbonate comprises repeat units having the structure wherein the block polycarbonate polysiloxane comprises based on the weight of the block polycarbonate polysiloxane 70 to 90 weight percent of carbonate units of the formula and 10 to 30 weight percent of dimethylsiloxane units wherein the poly alkylene terephthalate comprises poly butylene terephthalate wherein the block polyestercarbonate comprises a polyester block comprising resorcinol ester repeat units having the structures and a polycarbonate block comprising carbonate repeat.