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Struthers-Dunn - Leaders in Relays & Controls Since 1923
Manufacturer of High Quality Relays & Controls
Relays & Controls
Relay Products Distributor InventoryGeneral PurposeTraffic Relays Power Relays & Contactors Motor Reversing Latching/Sequencing Special Purpose & Custom Design Sensitive - Low Input Power Timer/Sensor Reed Accessories and Sockets

Industries Served — Relay and Controls Marketplace

Since 1923 Struthers-Dunn is widely known and accepted in the relay and controls marketplace requiring power relays and contactors. Our products have a proven track record of high performance, long life cycle, and very sturdy design which are essential in the marketplace application segments we serve. Our product marketing is focused in four categories.

Automation and Controls

In this market we emphasize those segments for power generation, water-waste water treatment, HVAC, and industrial machinery. These segments are supported by our vast offering of industrial time delay relays such as our 388, 246/247, 326/327, and 67 Series. Sequencing and latching relay 255,311, and 545 Series addressed other applications in this segment. In addition we also produce the Nuclear Qualified 219 Series approved for use in Nuclear Power Plant applications.

Motor Control

In this market applications for our industrial power relays and contactors reside in those segments for cranes-hoists-elevators, HVAC, and electric vehicles. Our PM Series, 275 Series, 575 Series, and new 645RT Solid State Motor Reversing Series of relays are ideally suited for the horsepower application requirements in this market segment.

Traffic Industry

Municipal-State Department of Transportation (DOT) or Department of Public Safety (DOPS) provides the applications for this market segment. Our major product solutions are found within the traffic intersection signal cabinets. The W21 and 136 Series have a stellar reputation for reliable and durability in traffic control requirements. The W21 Series historically used for tungsten signal lamps has been enhanced to accommodate the low voltage requirement associated with the new LED lamps along with an LED to speed trouble shooting at those busy intersections. The W21 is now RoHS Compliant. We also offer six , eight , and twelve pin sockets to work with all the other components within the traffic cabinet. We are developing a Non-Mercury Solid State Relay to replace our current Mercury Displacement Relays used in the traffic cabinet. Additionally, we provide industrial contactors up to 300 AMPS to meet various street lighting applications.

Custom Design

We have long recognized that every electro-mechanical relay application cannot be addressed with the standard “off the shelf” commodity relay. So we welcome the opportunity to review, develop, and provide a custom solution for our customers. We have developed specially designed relays for aviation-airport lighting and rail industry as well as our focused market segments. Our B101 and 88HPX Hermetic sealed relay Series are just one example.

Competitive relay obsolescence also provides our customers with a potential replacement option due to our commitment to custom designs.