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Mercury Helios 3 Power Adapter
12V / 7.5Amp Barrel Style Power Adapter

This power adapter is for certain OWC Mercury Helios 3 storage solutions and enclosures with a DC 12V power input accepting a barrel type connector.

This power adapter is NOT compatible with 4 or 5 pin plugs used with OWC Mercury Elite, OWC Mercury Elite-AL, OWC Neptune, and NewerTech miniStack storage solutions/enclosures. Those adapters require a DC 5V/12V Power adapter accepting a 4, or 5 pin style connector.

For your convenience, a compatibility chart is provided below to ensure proper product selection. Please be sure that your drive enclosure or router has this port before ordering.

For 4-pin connection power, we recommend the OWC 4-Pin Power Adapter.
For 5-pin connection power, we recommend the OWC 5-Pin Power Adapter.

Product Specifications:

AC Input

  • 100-240V AC @50-60Hz / 2Amp to 1Amp

DC Output

  • +12V / 7.5Amp

Output Connection

  • 5.5mm x 2.5mm female
    center positive barrel

Power Indicator

  • Yes


  • UL
  • FCC
  • CE
  • TUV Rheinland
  • GS
  • PSE
  • KC
  • BSMI
  • CCC

Cable Length

  • 1.19 m (3.90 ft)


  • Height: 25 mm (1.0 in)
  • Width: 60 mm (2.3 in)
  • Length: 110 mm (4.3 in)


  • 391 g (0.86 lbs)
Manufacturer provided specifications for Other World Computing p/n HELIOS3P90W
This product is compatible with...
OWC Helios
OWC Mercury Helios 3
Thunderbolt 3 PCIe
expansion chassis
OWC Helios
OWC Express 4M2
4-Slot M.2 NVMe
SSD Enclosure
OWC Mercury Helios 3 Power Adapter 12V / 7.5 Amp Barrel Style Power Adapter Mfr P/N: HELIOS3P90W OWC SKU: OWCHELIOS3P90W Replacement power adapter for certain OWC Mercury Helios 3 solutions. 1 Year OWC Limited Warranty Ships: Same Day only $49.99
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