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Rectangular silver metal SFF power supply unit with fan grille and label

DELL

DELL L255AS-00 255W SFF power supply

SKU CH-WM71-N2J9K MPN L255AS-00

255W SFF power supply compatible with OptiPlex 3020, 7020, 9020, XE2 and Precision T1700 small-form-factor systems

  • 255 W output powers compatible Dell SFF desktops
  • Fits OptiPlex 3020, 7020, 9020, XE2 and Precision T1700
  • Replaces Dell part numbers H255ES-00, D255ES-00, AC255ES-00 and others
  • Brand-new unit supplied with 180-day warranty

255W SFF power supply for OptiPlex and Precision

This 255 watt unit is built for Dell OptiPlex 3020 7020 9020 XE2 and Precision T1700 small-form-factor desktops. It fits the proprietary chassis and connector layout used by those models. Buyers who need a higher wattage or a standard ATX form factor cannot use this supply.

Replaces multiple Dell part numbers

The unit carries part numbers H255ES-00 L255AS-00 D255ES-00 H255AS-00 AC255ES-00 AC255ES-01 V9MVK FP16X NT1XP 3XRJ0 YH9D7 VX372 so one SKU covers all listed variants. No cables or mounting hardware are mentioned in the data. Systems outside the named OptiPlex and Precision lines are not supported.

Highlights

  • 255 W output powers compatible Dell SFF desktops
  • Fits OptiPlex 3020, 7020, 9020, XE2 and Precision T1700
  • Replaces Dell part numbers H255ES-00, D255ES-00, AC255ES-00 and others
  • Brand-new unit supplied with 180-day warranty

Specifications

ModelL255AS-00

Questions about this item

Will the fan or capacitors need replacement during the life of this 255W SFF power supply?

The unit is new and rated at 255 watts; typical SFF supplies run for years before fan bearings or electrolytic capacitors wear out.

What limit appears first when this 255W unit runs at full load continuously?

The 255 watt maximum output is the hard ceiling; sustained draw at that level will hit the overload protection before any thermal limit.

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