78177-1X

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The Reliance Electric 78177-1X functions as a thyristor assembly.

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  • Part Number: 78177-1X
  • SKU: 781771XRE
  • Manufacturer: Reliance Electric
  • Series: Rectifiers & Misc.

About the 78177-1X

The 78177-1X is a Thyristor Assembly originally manufactured by Reliance Electric. The part you are replacing may be identified as coming from ABB or Baldor Reliance depending on the year of manufacture. The 78177-1X is a 3 phase, 30/75 horsepower 460 V assembly. Like most thyristor assemblies, the 78177-1X is designed to perform a simple semiconductor function. It is useful in locations where electromechanical devices cannot be used due to limitations in speed or reliability. The 78177-1X is designed as two copper/selenium oxide stacks with a gate that can be triggered via a current across an SCR located between the two stacks. The thyristor will continue to conduct until the voltage is reverse biased or until it is removed. This unit is a fully on or off device and has no option of proportional current. ABB/Reliance Electric was responsible for providing original documentation to the user to help with maintenance, installation, and handling. If this documentation has been lost or misplaced, or if you never had such documentation, please let our staff know when you place your order as we may be able to provide a source for duplicates. Typically, orders received before 3 pm our time will ship out to you on the day of order placement. If you have questions about shipping options, or if you would like to know more about our automatic warranty service, please review the information available on our website. Our staff is also available to help with these questions. Expedited shipping options are available.

Repair Services For 78177-1X

Type Lead Time Price Action
Repair Service 1-2 weeks $560

Our highly skilled technicians can repair your 78177-1X. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
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