Profile: Struthers-Dunn, LLC supplies electromechanical and electronic relays, which are used for traffic signals, power generation and distribution, factory automation, hoists, elevators, motor control & water treatment applications. We offer reed relays, power relays, sequencing relays, motor relays and special purpose relays. Our 48 series-general purpose relay is a non-reversing contactor with a 4 normally open, double make contact rated up to 3HP, that uses a solenoid type moving core design & generates high contact force. Our 131 series-mercury reed relays are single throw, normally open, and miniature mercury reed relays, which provide continuously refreshed contact surfaces for extremely long life.