Power shelf for NVIDIA Vera Rubin NVL72

Powering next-generation AI infrastructure with 110 kW DC power delivery

Flex’s 110 kW 3RU MGX power shelf for NVIDIA Vera Rubin NVL72 (or equivalent) is designed for the most demanding GPU workloads. Supporting up to six hot-pluggable 18.4 kW power supply units (PSUs) and one power supply controller (PSC), the shelf delivers up to 110 kW of DC output power to all rack-level payloads through a 52 V DC-DC bus architecture, operating with a three-phase AC input range of 346 VAC to 480 VAC.

Main features

Hot-pluggable PSUs and PSC for simplified servicing and zero-downtime maintenance
Telemetry and monitoring available through Redfish for real-time visibility into shelf and PSU health
Current sharing capability across multiple shelves with two rear-side RJ45 connectors enabling synchronized power-up and active current sharing

Bootloader support for field firmware upgrades of both PSC and PSUs, upgradable online by the system
Front-to-back airflow with internally controlled variable-speed fans
Power pulsation buffer device (>1200J energy storage) ensures sinusoidal AC input current under dynamic and EDPP loading conditions
Titanium+ efficiency at 400 VAC, 415 VAC, and 480 VAC (measured with fans)
UL/IEC62368-1 safety certified

Applications

AI servers

NVIDIA Vera Rubin NVL72 and equivalent

Hyperscale cloud services

High-performance computing (HPC) infrastructure

Components

3RU power shelf

110 kW shelf housing 6 PSU slots and 1 PSC slot, with 2 AC power cords, 3 BZlisa850s DC output connectors, and 2 rear RJ45 modules

18.4 kW PSU

Flex 3RU NVIDIA MGX™ power supply unit with true three-phase AC input (L1, L2, L3, PE), 52V output, and integrated power pulsation buffer for EDPP scenarios

PSC module

1RU EIA hot-pluggable power supply controller with 1Gb Ethernet RJ45 (PoE PD), Redfish management, PLDM firmware update, and ASPEED AST2620A3 controller

Specifications

Parameter	Specifications
Part number	NVD-R-11E4ADT00-101
Configuration	6× 18.4kW PSUs + 1× 3RU power shelf + 1× PSC
Output power maximum	110 kW
Output voltage	52V @ full load
Output current	354A
Input voltage range	AC input: 346 VAC to 480 VAC (L-L), 3-phase
Frequency	47 Hz to 63 Hz
Power factor	>0.99 at full load
Dynamic loading	Supports 10% to 150% pulse power loading
Hold-up time	>20ms at full load
Efficiency	Titanium+ (ErP+ with PSU fans)
Cooling	Front-to-back airflow, variable-speed fans
Dimensions (L × W × H)	876.2 × 438 × 131.4mm
Safety	UL/IEC62368-1
EMC standards	EN55032 Class A, FCC part 15 Class A
Communication	I²C (400kHz), Redfish via PSC
Operating temperature	−5°C to 40°C
Input connectors	BIZLINK: 117G0-167591-R1
Output connectors	BIZLINK: 117G0-169002-R1 AMPHENOL: 10179666-HX002LFC

Download the Flex power shelf for NVIDIA Vera Rubin NVL72 datasheet