Specifications
Type
DC-DC server power shelf
Input
800 Vdc
Output
50 Vdc
Power Capacity
90 kW
Efficiency
Up to 98.5%
Rack Role
Converts the 800 Vdc rack bus down to 50 Vdc server input
Architecture
800 VDC HVDC for AI racks
Upstream
Delta 72 kW AC-DC shelf (400-480 Vac to 800 Vdc)
Modules
Parallel HVDC modules from 800 Vdc to 50/12 Vdc
Module Power Density
Up to 2,500 W/in³
Complementary
2RU 22 kW battery backup system for 48 Vdc systems
MPN
90 kW DC-DC Server Power Shelf
Overview
The Delta 90 kW DC-DC server power shelf steps the 800 Vdc rack bus down to the 50 Vdc input that AI servers expect, at efficiency up to 98.5%. It is the second stage of Delta's 800 VDC architecture: AC-DC shelf in, DC-DC shelf out.
Alongside it Delta ships parallel HVDC modules that convert 800 Vdc to 50 Vdc or 12 Vdc at power densities up to 2,500 W per cubic inch, plus a 2RU 22 kW battery backup system for 48 Vdc rails with up to 60 seconds of ride-through.
The two-shelf combination lets an AI rack accept 400-480 Vac at the wall and distribute the whole rack over an 800 Vdc bus, which is the topology NVIDIA and its power partners have adopted for Blackwell-class systems.
Key Benefits
90 kW per shelf; up to 98.5% conversion efficiency; 800 Vdc to 50 Vdc single stage; 2,500 W/in³ parallel HVDC modules for tight racks.
Applications
AI training rack power distribution, HVDC data center retrofits, GPU server racks with 800 Vdc busbars, and battery-backed 48 Vdc critical loads.
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