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      81001-450-51-R

      SGCT Power Device
      Ships by Thursday, November 12
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Allen-Bradley 81001-450-51-R is a single 800 A SGCT power device for the PowerFlex 7000 medium-voltage drive family.
      • Manufacturer part number
        81001-450-51-R
      • Shipping
        Swift global dispatch
      • Condition
        New, original product
      • Shipping size (est.)
        25cm x 20.7cm x 5.5cm
      • Country of Origin
        USA

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      What happens after you enquire

      • 0

        Review your reference

        Send the complete Allen-Bradley 81001-450-51-R reference, label photographs and required quantity. Include the installed drive assembly and whether a single device or matched set is required.

      • 1

        Confirm the offer

        Review the offered revision, condition, included items and documents against the confirmed installation.

      • 2

        Arrange dispatch

        Confirm quantity, dispatch date, lead-time start and delivery details in the quotation.

      • Match the complete marking

        Include the complete Allen-Bradley 81001-450-51-R marking and any revision or assembly number visible on the item. Include the PowerFlex 7000 drive and affected power-device position.

      • Check the offered item before ordering

        Request available label and connector photos. Have your maintenance team compare the offered 81001-450-51-R with the installed equipment and applicable Allen-Bradley documentation.

      Technical specifications for 81001-450-51-R

      • Manufacturer:
        Allen-Bradley
      • Product Category:
        General Automation
      • Spare Part Number:
        81001-450-51-R
      • Weight:
        1.14 kg
      • Tariff Code:
        8537101190
      • Device technology:
        SGCT
      • Device current class:
        800 A
      • Device quantity:
        1
      • Assembly form:
        Single device
      • Gate-drive supply check:
        19.6–20.4 V; Offline diagnostic
      • Gating signal:
        Fiber-optic
      • Diagnostic feedback:
        Fiber-optic
      View as PDF Ask for Quote

      Information

      Overview Downloads Applications / Compatibility Product Precautions
      • Allen-Bradley 81001-450-51-R belongs to the PowerFlex 7000 switching power structure. Its 800 A single-device identity must be considered together with the installed drive assembly and the optical gate/feedback circuits.
      Device class: 800 A SGCT
      Assembly form: Single device
      Diagnostic context: Optical gating and feedback comparison
      The 81001-450-51-R selection identifies a single device in the 800 A SGCT current class. It is a single spare device, separate from the matched-pair and matched-triple selections. The part is used within the PowerFlex 7000 power-electronics architecture; its device current class is not a complete drive output rating.

      SGCT diagnostics compare feedback before and after an issued gate pulse. For the inverter, unchanged low feedback indicates the feedback-loss path, while unchanged high feedback indicates that the gate pulse may not have reached the device. The diagnostic sequence operates during initial contactor closure and the start process, with additional checks after a drive reset.

      Fault investigation combines device resistance, gate-driver LED status, optical-cable condition and the prescribed Gating Test. The associated nominal 20 V firing supply must be active; the Offline diagnostic specifies 19.6–20.4 V. A device can be faulty without measuring as a complete short, so a kilohm reading alone does not establish health.
      Controller platform reference: PowerFlex 7000 SGCT power structure. Match the installed assembly and the drive service procedure.
      The original technical excerpt for Allen-Bradley 81001-450-51-R covers SGCT diagnostic paths and exact spare-part selection. The separate installation guide covers assembly identification, isolation, optical inspection and diagnostic recovery.
      Original manufacturer pages retain their technical context. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
      System and supply context: The 81001-450-51-R spare is a single device in the 800 A class. Its use requires the corresponding PowerFlex 7000 assembly; optical interfaces, supplies and other drive hardware are separate unless itemized.

      Application scope: Apply the exact spare selection to the installed power structure after identifying its assembly and diagnostic position. Current class alone does not establish interchangeability with another drive device.
      Prepare Allen-Bradley 81001-450-51-R for its configured installation using these checks.
      Identify the assembly

      Match the exact spare reference, current class and single/matched-set form.

      Isolate medium-voltage energy

      Follow the drive isolation, discharge and verification procedure before opening the power structure.

      Preserve optical routing

      Keep gate and feedback fibers identified and free of pinching or damage.

      Check the firing supply

      Verify the auxiliary supply and seated firing-card power connections under the prescribed test conditions.

      Interpret resistance correctly

      A device need not be a complete short to be faulty; follow the specified test procedure.

      Prove diagnostic recovery

      Resolve the original fault and associated causes before authorizing drive operation.

      Alternative Names

      81001 450 51 R Allen-Bradley 8100145051R

      Technical notes

      Engineering relationship: Gate-drive supply and optical feedback are parts of the drive diagnostic circuit. They do not establish the SGCT blocking voltage, switching frequency or complete drive current rating.

      Installation boundary: Retain phase/device-position identifiers when inspecting the gate driver, supply and fibers. A low suspect resistance can indicate a faulty SGCT without a complete short.

      Technical basis: Rockwell Automation PowerFlex 7000 Troubleshooting Guide, 7000-TG002L-EN-P, February 2020. 81001-450-51-R is the 800 A single device selection. The optical and gate-supply values describe PowerFlex 7000 SGCT diagnostic conditions, not independent semiconductor voltage or drive-output ratings.

      FAQ View All FAQ

      • Is 81001-450-51-R a single SGCT or a matched multi-device set?
        It is one 800 A SGCT. The separate matched-set references are different spare-part selections; a single device must not be treated as a matched set.
      • Does the 800 A designation of 81001-450-51-R specify the complete drive output current?
        No. It identifies the SGCT device current class. Drive output capability depends on the installed PowerFlex 7000 configuration and cannot be assigned from this spare-part number alone.
      • Why can an Offline diagnostic appear around 81001-450-51-R before the motor runs?
        The inverter compares SGCT feedback before and after a gate pulse during initial contactor closure and the start diagnostic sequence. Diagnostic checks also run after a drive reset.
      • Can a kilohm resistance reading prove that 81001-450-51-R is healthy?
        No. A faulty SGCT need not be completely shorted. Suspect low readings can remain in the kilohm range; use the prescribed resistance-check procedure and diagnostic context.
      • Which auxiliary supply check is relevant to the firing card associated with 81001-450-51-R?
        The SGCT diagnostic procedure calls for the associated nominal 20 V supply to be active within 19.6–20.4 V, with power connections seated. This is a gate-drive diagnostic condition, not a blocking-voltage rating.
      • What should be examined if the feedback path to 81001-450-51-R stays low?
        Check seating and physical condition of the feedback fiber, the optical interface and firing-card connections. Correlate those checks with gate-driver LEDs, the gating test and the device resistance test.
      • Does replacing 81001-450-51-R eliminate a damaged optical cable?
        No. The power device and optical path are separate fault sources. A pinched, damaged or poorly seated fiber can still prevent the expected feedback transition after replacement.
      • How should the result of a gating test involving 81001-450-51-R be assessed?
        Compare the commanded gate event, gate-driver indications and returned feedback under the prescribed drive test procedure. Correct supply and secure connections must accompany the expected diagnostic response.
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