Power-One — MA-L (DC:57:26)

Power-One, Inc. (NASDAQ: PWER) was a power-conversion and power-management equipment manufacturer whose IEEE MA-L registration for DC:57:26 lists the corporate name "Power-One" with an Italian address (Terranuova, Arezzo — the registry's "San Girgio" reads as a likely transliteration of "San Giorgio"). The company's public history is well documented outside the OUI record: ABB acquired Power-One in a deal that closed July 25, 2013 for roughly $1 billion, then divested the non-solar "Power Solutions" business in 2014 while retaining the solar-inverter line, later folded into ABB's PV/FIMER offering. Power-One's product footprint moved from conventional power supplies toward grid-tied solar/PV inverters under the "Aurora" brand, and third-party installation literature documents Aurora inverters with RS-485-based monitoring hardware — plausible but unconfirmed as the specific device class behind this prefix. A same-named but organizationally distinct registrant, "Power-One as" of Norway (00:0A:5B), is a separate IEEE assignment and, per this pipeline's slug convention, belongs in its own vendor-power-one-as entry rather than being merged here. Web research also surfaced three additional 36-bit CID blocks attributed to the Power-One family, but a direct read of the registry's the IEEE MA-S registry turned up no matching row, so that claim is treated as an open conflict rather than an added fact.

OUI assignment

DC:57:26 (DC5726) → "Power-One", registry address "Via San Girgio 642 Terranuova Arezzo IT 52028" (Italy; likely a transliteration/scrape artifact for "Via San Giorgio") [Confirmed] — the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI), single block for this org name; a distinct registrant "Power-One as" (Norway, 00:0A:5B) exists under a related but separate corporate name and is out of scope for this entry per pipeline slug convention [Confirmed] — the IEEE MA-L registry, the IEEE MA-L registry

Company identity

Power-One, Inc. (NASDAQ: PWER), a power conversion / power management equipment manufacturer [Confirmed] — SEC 8-K exhibit, ABB press release

Corporate history

acquired by ABB, deal closed July 25, 2013, reported value ~$1B; ABB later divested the non-solar "Power Solutions" business (2014) and retained the solar-inverter business [Confirmed] — new.abb.com press release, SEC filing, Industrial Distribution

Product line

power supplies, later solar/PV inverters under the "Aurora" brand [Likely] — TrackSO installation/connection manual referencing Power-One branded inverters

Additional family registrations (unresolved conflict)

web research reported three IEEE 36-bit CID blocks under the Power-One name (0050C242, 0050C2E6E0 "Power-One Italia S.p.A", 0050C2FA20), but a direct registry read of the IEEE MA-S registry found no matching row — conflicting; not asserted as fact [Unknown/conflicting]

Registration date

Unknown — IEEE does not publish OUI assignment/registration dates; not fabricated [Confirmed absence] — the IEEE MA-L registry schema

IANA reference

not applicable to a MAC/OUI vendor record; stays blank [Unknown]

Specific device model tied to DC

57:26 itself: Unknown — only the corporate/product family is corroborated, not a model-to-prefix mapping [Unknown]

Master/pipeline status

no existing row in this site's own enrichment records and no prior file in this site's own enrichment records — fresh candidate, not a duplicate [Confirmed] — this site's own enrichment records