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Rectangular metal power supply unit with label and connector sockets

Delta P

Delta P ADP-200DFB 205W Power Supply 21.5" A1311

SKU CH-28P4-FP0M4

205W ATX12V power supply for 21.5" A1311 systems, compatible with ADP-200DFB and OT8043 part numbers

  • TypeATX12V
  • 205W output powers the 21.5" A1311 system
  • ATX12V design fits standard desktop chassis
  • Replaces Apple part numbers 614-0444, 614-0445, 661-5299
  • Compatible with OT8043 and ADP-200DFB variants
  • Tested working, pulled from a functional A1311 unit

21.5" A1311 replacement PSU

This 205W ATX12V supply is built for the 21.5" A1311 all-in-one chassis and the MB950, MC309, MC413, MC508 and MC509 board revisions. It ships as either the ADP-200DFB or the OT8043 variant depending on stock. The unit is new and tested to power the original platform without modification.

Critical wattage match

The single specification that decides fit is the 205W output rating. Only a supply rated at 205W matches the A1311 power budget; a lower or higher rating will not meet the board requirements. Verify the 205W figure against the original label before ordering.

Sustained-load behaviour

Under continuous load the supply delivers its rated 205W within ATX12V limits. The unit is pulled from a working A1311 and graded at about 95% new condition, indicating stable rails during extended operation. No derating or thermal throttling data is provided beyond the rated output.

Highlights

  • 205W output powers the 21.5" A1311 system
  • ATX12V design fits standard desktop chassis
  • Replaces Apple part numbers 614-0444, 614-0445, 661-5299
  • Compatible with OT8043 and ADP-200DFB variants
  • Tested working, pulled from a functional A1311 unit

Specifications

TypeATX12V

Questions about this item

What does the 205 W rating mean when this PSU is installed in a 21.5" A1311 iMac?

It is the maximum continuous power the unit can deliver to the logic board and drives in that specific iMac model.

Which power standard does the ADP-200DFB follow and what does that limit?

It follows the ATX12V standard, which defines the voltage rails and connector pin-out used by the A1311 logic board.

Will this supply fit the 21.5" A1311 chassis without modification?

Yes, the ADP-200DFB and the compatible OT8043 are direct replacements for the original 614-0445 and 661-5299 units used in the A1311.

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