Ashwin, who was the star Indian bowler in the Australian innings yesterday when he grabbed a career-best 7/103, was imposed the sanction for wearing a batting pad, which had more manufacturers' logos than permitted under ICC rules, when he batted on the third day.
He was found to have breached Article 2.1.1 of the ICC Code of Conduct for Players and Player Support Personnel which relates to "breach of the ICC's Clothing and Equipment Regulations during an International Match".
Ashwin accepted the Level 1 charge and the sanction proposed by Chris Broad of the Emirates Elite Panel of ICC Match Referees.
The charge against Ashwin was brought by on-field umpires Marais Erasmus and Kumar Dharmasena and third umpire Vineet Kulkarni.