Specifications
Architecture
800 VDC reference architecture built to NVIDIA's 800 VDC specification
MVSST
2 MW medium-voltage solid-state transformer, 15 kV class
MVSST Efficiency
>97% at 800 VDC
Beam Rubin DSX
Grid-to-chip platform announced at GTC 2026
Busbar
Power distribution technology via busbar, included in the ORV3 design
Backup
Supercapacitors for fast-cycle power backup and GPU step-load damping
DC Connectors
Purpose-built DC connectors for 800 VDC rack distribution
Containment
Hot aisle containment system supporting busway and cable trays
Transition
480 VAC / 415 VAC to 800 VDC - fewer conversion stages, lower I2R loss
Rack Class
Designed for 200 kW to 600 kW+ AI racks and 1 MW-class Kyber platforms
Ecosystem
Open Compute Project Global Summit showcase, San Jose, October 2025
Investment
$50M Virginia facility and $30M Nebraska switchgear plant (2027)
Partnership
Siemens Energy collaboration for modular data centers with on-site generation
Digital
Edge-based solution detecting and mitigating AI power bursting
Strategy
Grid-to-chip across power distribution, backup power and digital technologies
Overview
Eaton's 800 VDC reference architecture is the practical bridge between today's 415/480 VAC data halls and the megawatt-class AI racks that follow Kyber in 2027. Built in support of NVIDIA's 800 VDC specification, it converts medium-voltage AC to 800 VDC once for distribution and carries that DC to the rack, deleting the intermediate AC/DC stages that make a 54 V bus unworkable past roughly 350-400 kW per rack.
The anchor product is the MVSST - a 2 MW, 15 kV class medium-voltage solid-state transformer running above 97% efficiency at 800 VDC. Around it Eaton packages the parts of the electrical stack that a busway alone does not solve: supercapacitors for fast-cycle power backup that damp GPU step-loads, DC connectors rated for the higher voltage, busbar distribution included in the ORV3 design, and hot aisle containment engineered to carry busway and cable trays.
The commercial context matters as much as the hardware. Eaton has committed $50M to a Virginia facility and $30M to a Nebraska switchgear plant expected to operate in 2027, and is collaborating with Siemens Energy to support rapid construction of modular data centers with integrated on-site generation. The grid-to-chip portfolio spans power distribution, backup power and digital technologies, including an edge-based system for detecting and proactively mitigating AI power bursting.
Key Benefits
Cuts conversion stages: one MV-to-800 VDC conversion replaces the AC UPS plus in-rack shelf cascade, raising end-to-end efficiency and cutting copper. Handles GPU step-loads: integrated supercapacitor backup damps the millisecond-scale transients that dominate AI cluster power quality. Deployable incrementally: sidecar and ORV3 busbar elements retrofit onto existing AC infrastructure while the upstream plant stays in place.
Applications
Megawatt-class AI factories and GPU racks, brownfield data center power upgrades, medium-voltage distribution to 800 VDC, AI cluster power quality and step-load damping, modular prefabricated data centers, switchgear and busway deployments.
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