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Dell L255AS-00 SFF power supply unit, matte black metal enclosure with ventilation grille and rear IEC socket

DELL

DELL L255AS-00 SFF Power Supply 255W Optiplex 3020 7020 9020

SKU CH-M2SF-DVQAV MPN L255AS-00

A 255 W SFF switching power supply compatible with Optiplex 3020, 7020 and 9020 desktops

  • Max wattage255 W
  • Product typePower Supply
  • Delivers 255 W of steady power to small-form-factor desktops
  • Fits OptiPlex 3020, 7020 and 9020 SFF chassis without modification
  • Switching design keeps efficiency high across typical office workloads
  • Replaces Dell part numbers NT1XP, 0NT1XP and PS-3261-2DF directly
  • Ships as a single unit ready for immediate installation

Dell 255W SFF Power Supply

The Dell L255AS-00 is a 255 watt switching power supply built for small form factor Optiplex desktops. It fits the 3020, 7020 and 9020 chassis and uses the NT1XP part number. The unit delivers the rated output for standard office components. It arrives as a direct replacement for the original PSU.

Who this suits and who it does not

This unit suits owners of the listed Optiplex SFF models needing a 255 watt replacement. It does not suit builds that require higher wattage, standard ATX dimensions or modular cabling. Buyers with tower chassis or discrete graphics upgrades should look elsewhere.

The deciding specification

The 255 watt maximum power rating is the single figure that decides compatibility. If the system's components draw more than this limit the supply will not support the build. Verify the total system draw before purchasing.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 96% of the 10,869 comparable items (median $142.99).
Max wattage 255 W
Lower than about 94% of the 930 comparable items (median 850 W).

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Specifications

Product
Product typePower Supply
Power
Max wattage255 W

Questions about this item

Will the 255 W SFF unit fit the same mounting points as the original supply in my OptiPlex 7020?

Yes, the L255AS-00 is built for the SFF chassis used by the OptiPlex 3020, 7020 and 9020, so it aligns with the factory screw holes and power connectors.

How can I verify the PS-3261-2DF is delivering stable power after installation?

Power on the system and confirm it posts without unexpected shutdowns; the fan should spin and the front-panel LED stays solid, indicating the 255 W supply is operating normally.

Does the package include the NT1XP power supply and the cables needed for an OptiPlex 9020?

The box contains one Dell L255AS-00 switching power supply; all required ATX and proprietary connectors are integrated on the unit, so no extra cables are necessary.

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