Motor Reversing

Request Quote

Struthers-Dunn Home

48 Series 
​Contactor Motor Relays

The 48 series is a contactor with a 4 normally open, double make contacts rated up to 3HP. It uses a solenoid type moving core design which generates high contact forces. The coil is encapsulated for complete protection. Screw terminals are standard. Available as an option is a SPDT, 15 Amp, snap switch, auxiliary contact.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

48 Series Drawing

---

275 Series
Motor Reversing Contactors  ​

The 275 series is a 2 coil, compact motor reversing contactor which finds extensive applications in the industrial door operator industry, the hoist industry and electronic wheel balances, to name a few. The 275 series has Quick connect coil terminals extending out the back (opposite the contact terminals), mechanically interlocked armatures is a standard feature.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

275 Series Drawing

---

575 Series
Motor Reversing Contactors 

The 575 series relay is rated to 7.5HP. Two sets of 3 pole, double-make, N.O. contacts are mechanically interlocked to prevent simultaneous closure. Front mounted auxiliary contacts are available for electrical lockup. The 575 motor revering contractor is widely used for control of overhead doors, elevators, hoists, machine tools, and others similar devices that requires frequent jogging.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

575 Series Drawing

645T Series
Solid State On / Off Motor Relays  

The 645T series of solid state relays uses triacs for on/off control of three phase loads. Operation is three pole normally open. Inputs can be AC or DC operated. Load currents can range from 10 to 50 amps and up to a nominal voltage of 480VAC. Both random turn on or zero cross is available.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

​645T Series Drawing

645S Series
Solid State On / Off Motor Relays

The 645S series of solid state relays uses back to back SCRs for on/control of three phase loads. Operation is three pole normally open. Inputs can be AC or DC operated. Load currents can range from 10 to 75 amps and up to a nominal voltage of 480VAC. Both random turn on or zero cross construction is available.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

645S Series Drawing

645RT Series
Solid State Reversing Motor Relays

The 645RT series of solid state relays uses triacs for reversing phases on three phase loads. The most typical use is motor reversing. Inputs are DC operated. Load currents can range from 10 to 40 amps and up to a nominal voltage of 480VAC. Both random turn on or zero cross is available.

For Additional Configuration please contact the manufacturer.

645RT Series Drawing

PM Series
Open Style Motor Relays  

The PM Series relays offer 4 double throw poles (4PDT) for up to 35 amp at 277 VAC or 20 amps at 28Vdc. Product also is capable of 10 amps tungsten switching. Screw terminals (#M4) are standard but .250” quick connects are also available.

Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.

PM Series Drawing