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Rectangular metal server PSU, matte black finish, rear fan grille and power socket visible

WMtec

WMtec server power supply 255W OptiPlex 3020 7020 9020 SFF T1700

SKU CH-Y7MV-8ZVXG

255-watt replacement power supply for OptiPlex 3020, 7020, 9020 SFF and T1700 desktops

  • 255 watt output powers OptiPlex 3020, 7020, 9020 SFF and T1700 desktops
  • Replaces multiple Dell part numbers including YH9D7, 3XRJ0, T4GWM, HCWV2 and H1FWX
  • Matches model numbers H255ES-00, D255ES-00, AC255ES-00, L255ES-00 and H255ES-01
  • 100-240 volt input with 4.6 amp draw suits worldwide mains supplies
  • Operates on 50 to 60 hertz frequency for stable power delivery

Replacement PSU for OptiPlex SFF

This 255W power supply fits OptiPlex 3020, 7020 and 9020 small-form-factor desktops as well as the T1700 workstation. It matches part numbers YH9D7, 3XRJ0, T4GWM, HCWV2 and H1FWX. The unit accepts 100-240V input at 4.6A and operates on 50-60Hz mains.

Installation notes

The PSU uses the proprietary small-form-factor shape so it slides directly into the chassis without adapter brackets. Verify the exact model number on your existing unit — H255ES-00, D255ES-00, AC255ES-00, L255ES-00 or H255ES-01 — because Dell revised the connector pinout across revisions. A mismatched revision will prevent the system from posting.

Pre-purchase checks

Confirm your computer is one of the listed OptiPlex SFF or T1700 models; tower or micro-tower variants use a different PSU frame. Check the label on the original supply for one of the five model numbers above. Ensure the 255W rating meets the power draw of your installed CPU, GPU and drives.

Highlights

  • 255 watt output powers OptiPlex 3020, 7020, 9020 SFF and T1700 desktops
  • Replaces multiple Dell part numbers including YH9D7, 3XRJ0, T4GWM, HCWV2 and H1FWX
  • Matches model numbers H255ES-00, D255ES-00, AC255ES-00, L255ES-00 and H255ES-01
  • 100-240 volt input with 4.6 amp draw suits worldwide mains supplies
  • Operates on 50 to 60 hertz frequency for stable power delivery

Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the power supply is delivering the rated 255 Watt output after installation?

The unit powers on when connected to 100-240V 50-60Hz mains and the system boots normally; a multimeter on the main rails should read within ATX tolerance of the labelled voltages.

What comes in the box and which cables or adapters must be purchased separately?

Only the power supply unit itself is included; all required ATX and proprietary connectors are built into the unit, so no extra cables are needed for OptiPlex 3020 7020 9020 SFF or T1700.

Which of the listed part numbers — YH9D7 3XRJ0 T4GWM HCWV2 H1FWX — should I choose for my OptiPlex 7020 SFF?

All five part numbers refer to the same 255 Watt model series (H255ES-00 D255ES-00 AC255ES-00 L255ES-00 H255ES-01); any one of them fits the 7020 SFF.

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