The high-density, high-efficiency dual-feed Open Rack version 3 (ORv3) power shelf minimizes power consumption and improves reliability for compute and storage applications in hyperscale and enterprise data centers. Featuring power supplies with demonstrated efficiency of 97%, the Artesyn 48V/3kW/2U Open Rack Shelf incorporates a hot swappable controller and can accommodate up to 12 48-V, 3-kW open rack rectifiers with power up to 30 kW. These rectifiers include an embedded automatic transfer switch (ATS) capability that switches input to a secondary AC source on detection of primary AC power loss without any interruption to output voltage. The power shelf is compatible with star, delta, and single-phase input configurations and includes a hot-pluggable, DMTF Redfish-compatible shelf controller for simple, secure monitoring and control over Ethernet. Its 48-V, 3-kW rectifiers are highline single-phase AC-DC power supplies that convert input voltages between 200 Vac and 277 Vac into 48-V output. A narrow output voltage band eliminates oversize design and enables a 4:1 ratio DC-DC conversion for downstream 12-V loads. Both the power shelf and the rectifiers are fully compliant with EN61000-4-5 and EN55035 EMC standards and IEC/UL/EN62368 safety standards.