Abstract: There is disclosed a current limiting electrical reactor that efficiently uses space. The reactor includes a supporting core with a circular periphery where the conductor is wound about the periphery of the coil in a convoluted spiral that spirals laterally out from the periphery of the core over itself, and lies in a radial plane passing through the core. A first terminal, adapted for electrical connection, is positioned at the beginning of the innermost turn of the conductor. A second terminal, also adapted for electrical connection, is positioned at the end of the outermost turn of the electrical conductor. Insulation is provided between adjacent turns of the conductor. This reactor configuration provides an electrical path along the conductor between the first and second terminals having a current limiting reactance.