The Senate Finance Committee, dismissing some Republican objections, on Tuesday approved the nomination of Jacob J. Lew for Treasury secretary and sent it on to the full Senate for a confirmation vote in the days ahead.

Mr. Lew, a longtime Democratic budget expert, received the support of all of Democrats on the committee as well as six Republicans, including Senator Orrin G. Hatch of Utah, the senior member of the opposition. The final vote was 19 to 5. Mr. Lew is widely expected to win confirmation, becoming the second Treasury secretary of Mr. Obama’s presidency.