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OWC Mercury Elite/Neptune Power Adapter

4.2Amp 4-Pin Style Power Adapter

This power adapter is for certain OWC Mercury Elite Pro and Newer Technology Guardian MAXimus storage solutions and enclosures with a DC 12V power input accepting a 4-pin type connector.

This power adapter is NOT compatible with 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 2A Power Input accepting a 5 pin style connector.

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

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.

Note: This part includes the transformer to device portion of the power supply only. Power cords sold separately.

Product Specifications:

AC Input

  • 100-240VAC @50-60Hz / 0.8Amp

DC Output

  • +5V/4.2Amp, +12V/3.0Amp

Output Connection

  • 4-Pin DIN M

Power Indicator

  • Yes

Brick Dimensions

  • 5.5" x 2.25" x 1"

Cord Length

  • 4.0 feet (122cm)


  • 12.3 oz.


  • UL / CUL / TUV / CE


Manufacturer provided specifications for Other World Computing p/n OWCMNES2PWR4A UPC#: 718122780679
The Power Adapter is compatible with... Learn how to find your Mac's model ID
OWC Mercury Elite Pro RAID Storage
OWC Mercury Elite Pro RAID Storage Solutions
Newer Technology Guardian Maximus
Newer Technology Guardian MAXimus Storage Solutions

Customer Ratings

Write a Review 4.5 / 5 2 out of 2 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous
Rating: 4/5 works great September 19, 2014 I bought this because I misplaced my other one, it got here quickly and works just fine. Of course I have now found the other one, but spares can be good things too.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Oakland, CA Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Saved my Iomega UltraMax Pro drive June 28, 2014 I have a 2 TB Iomega UltraMax Pro RAID drive which started behaving strangely and eventually died completely. I thought it was gone for good, but a web search suggested replacing the power transformer with this one. Sure enough, the drive is now as good as new with all of my data intact.

I would recommend this item to a friend!

OWC Mercury Elite 4.2Amp 4-Pin Power - Transformer only Mfr P/N: OWCMNES2PWR4A OWC SKU: OWCMNES2PWR4A 1 Year OWC Limited Warranty Ships: Same Day only $19.99
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