Specifications
Standard
Open Rack V3 (ORV3), Open Compute Project
ORV3 3 kW PSU
3 kW hot-swap power supply unit, 48 VDC output
ORV3 5.5 kW PSU
5.5 kW hot-swap power supply unit, 48 VDC output
ORV3 18 kW Power System
18 kW power shelf populated with ORV3 PSUs
ORV3 33 kW Power System
33 kW power shelf for high-density AI racks
Output voltage
48 VDC rack-level distribution
Redundancy
N+1 and N+N hot-swap PSU configurations
Form factor
ORV3-compliant shelf and PSU mechanical standard
Rack integration
Designed for Open Rack V3 21-inch rack architecture
Target load
GPU and accelerator-dense AI training and inference racks
Hot swap
Front-serviceable, hot-swappable power supply units
Efficiency
High-efficiency power conversion for datacentre PUE targets
Overview
Delta's ORV3 server power line implements the Open Compute Project Open Rack V3 power architecture, which replaces legacy 12 V rack distribution with 48 VDC for high-density AI compute. The portfolio covers 3 kW and 5.5 kW hot-swap power supply units plus populated 18 kW and 33 kW power shelves.
Moving rack power to 48 VDC cuts distribution losses at the busbar and reduces the copper required for the currents modern GPU racks draw. The shelves accept multiple ORV3 PSUs in N+1 or N+N configurations and expose a 48 VDC bus for the compute sleds.
The 33 kW shelf is aimed at accelerator-dense AI racks, while the 18 kW shelf suits standard hyperscale compute. Both are built to the ORV3 mechanical standard for 21-inch Open Rack V3 enclosures.
Key Benefits
48 VDC distribution. Lower busbar losses than legacy 12 V rack power. Shelf scalability. 18 kW and 33 kW shelves from the same PSU family. Hot swap. Front-serviceable N+1/N+N redundancy. OCP standard. ORV3-compliant mechanics and connectors. AI-rack ready. Sized for GPU-dense training and inference sleds.
Applications
AI and GPU training racks, hyperscale compute racks, Open Rack V3 datacentre deployments, 48 VDC power distribution retrofits, edge and colocation high-density pods.
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