Struthers-Dunn

Struthers-Dunn Inc, founded in 1923 by John Struthers-Dunn, is one of the oldest and most respected relay manufacturers in the world. The company has a rich history, having been a pioneer in the development of industrial controls, particularly in the production of military relays during World War II. Struthers-Dunn is known for its high-reliability products, including the 219 Series of industrial relays designed for use in nuclear energy facilities, and its contributions to the US Military's Qualified Product List (QPL) of products. The company has also been at the forefront of industrial automation, introducing early Programmable Logic Controllers (PLCs) and advanced time-delay relays. Today, Struthers-Dunn continues to provide custom solutions for various industrial applications, including traffic signals, power generation, and factory automation, solidifying its position as a leader in electromechanical and electronic relay manufacturing.