Arc Reactor 3D model

The Arc Reactor is an energy source originally designed by Howard Stark and Anton Vanko, and later independently built by their sons, Tony and Ivan. It was initially designed as part of an attempt to replicate the Tesseract's energy based on Howard's study of the object. Tony Stark eventually builds two versions—a large industrial reactor for reactor his machines at the Stark Industries Headquarters, and a miniature version embedded in his chest to power his armor (also known as an RT) and prevent the shrapnel from reaching his heart.