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Dell 3WN11 H240AS-00 240W ATX SFF M-ITX Power Supply D240A002L RV1C4 J50TW 2TXYM
Dell

Dell 3WN11 H240AS-00 240W ATX SFF M-ITX Power Supply D240A002L RV1C4 J50TW 2TXYM

Status: Dell 3WN11 H240AS-00 240W ATX SFF M-ITX Power…: Unavailable on Amazon as of . SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Dell 3WN11 240W ATX SFF M-ITX Power Supply RV1C4 J50TW 2TXYM: Rated 240W output, the OEM power level for Dell OptiPlex 390 systems; main trade-off: 240W ceiling leaves little headroom for a discrete GPU upgrade.

Unavailable on Amazon as of

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Currently unavailable on Amazon. Not the same product — an in-stock alternative:

Similar: S-Union Upgraded New 240W Power Supply Unit… — $25.42 on Amazon as of 2026-10-07 04:31 UTC (price may vary).

View Current Price — $25.42
Original listing (currently unavailable) → Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ Rated 240W output, the OEM power level for Dell OptiPlex 390 systems
  • ✓ Sold as a direct replacement PSU for the Dell OptiPlex 390
  • ✓ Matches Dell part numbers 3WN11, H240AS-00 and D240A002L
  • ✓ Also cross-references RV1C4, J50TW and 2TXYM for part-number lookups
  • ✓ Small SFF/M-ITX-class unit sized for compact Dell desktop chassis

Cons

  • ✗ 240W ceiling leaves little headroom for a discrete GPU upgrade
  • ✗ Listing only confirms fit for the OptiPlex 390, not other models
  • ✗ No 80 PLUS efficiency rating stated in the product listing
  • ✗ Connector types and cable lengths not listed, so check them before ordering

Manufacturer description

3WN11 DELL 240W POWER SUPPLY FOR OPTIPLEX 390

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SpecPicks Verdict

SpecPicks scored Dell 3WN11 240W ATX SFF M-ITX Power Supply RV1C4 J50TW 2TXYM using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Dell's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Full Specifications

ASINB00OZI87QC
BrandDell
SeriesH240AS-00
Wattage240 watts
Model NameH240AS-00
Form FactorATX
Item Weight0.5 Kilograms
ManufacturerDell
Model NumberH240AS-00
Connector TypeATX
Cooling MethodAir
Output Wattage240 Watts
Item model numberH240AS-00
Compatible DevicesPersonal Computer
Product Dimensions12 x 10 x 9 inches
Date First AvailableDecember 30, 2013
Item DimensionsLxWxH12 x 10 x 9 inches
Item dimensions L x W x H12 x 10 x 9 inches
Is Discontinued By ManufacturerNo

Ready to buy?

Amazon shows no buyable offer for Dell 3WN11 H240AS-00 240W ATX SFF M-ITX Power… at the last check. A similar in-stock product is S-Union Upgraded New 240W Power Supply Unit…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $25.42

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Dell 3WN11 H240AS-00 240W ATX SFF M-ITX Power Supply D240A002L RV1C4 J50TW 2TXYM
Similar, in stock — $25.42 →