Manufacturer of High Quality Relays & Controls - Struthers-Dunn general purpose relays, power contactors, motor reversing relays, latching relays, sequencing relays, special purpose relays, custom design relays, sensitive - low input power relays, timer relays, sensor relays, reed relays, sockets, electromechanical re Struthers-Dunn is the leading manufacturer of electromechanical and electronic relays for traffic signals, power generation and distribution, factory automation, hoists, elevators, motor control and water treatment applications.