The Xtreme Power AXL33 is a high-density AC-to-DC power platform designed to deliver 50 VDC directly at the rack for AI, GPU, and Open Compute Project (OCP) environments.
AXL33 converts single- or three-phase AC input into regulated 50 VDC, eliminating server-level AC-DC conversion and simplifying rack power design. With 33 kW per 1U, integrated control, and modular battery backup, AXL33 supports scalable, high-density AI infrastructure.
Download AXL33 Data Sheet (PDF)
https://xpcc.com/wp-content/uploads/AXL33-flyer.pdf
Key Specifications
- Output Voltage: 50 VDC
- Power Capacity: Up to 33 kW per shelf
- Scalability: Up to 132 kW (4 shelves in parallel)
- Form Factor: 1OU ORv3 rack-mounted shelf
- Module Design: 6 × 5.5 kW hot-swappable PSUs
- Efficiency: Up to 97.5%
- Input: Single- or three-phase AC input
- Control: Integrated PMM (Modbus / CAN)
- Battery: Modular BBU with scalable ride-through
Where AXL33 Fits
AXL33 operates as a rack-level AC-to-DC power platform, delivering 50 VDC directly to IT equipment.
It is deployed in:
- ORv3 and Open Rack environments
- AI and GPU compute racks
- High-density AC-fed rack architectures
Within the Xtreme Power portfolio:
- Traditional UPS systems → AC distribution to racks
- AXL33 → AC to 50 VDC conversion at the rack
- HVDC platforms (AX / DX) → centralized DC architectures
AXL33 is selected when rack-level DC delivery and simplified power architecture are prioritized.
Designed for ORv3 and High-Density Racks
AXL33 aligns with Open Rack V3 (ORv3) and similar high-density rack architectures. Delivering 50 VDC directly at the rack supports IT equipment designed for DC input and removes the need for internal AC-DC conversion within servers.
This approach reduces system complexity, improves efficiency, and aligns with hyperscale infrastructure standards.
High-Density 1OU Power Shelf
AXL33 delivers up to 33 kW in a compact 1OU form factor, enabling high rack power density without consuming valuable rack space. Multiple shelves can be deployed in parallel to scale rack capacity up to 132 kW, supporting both current and next-generation AI deployments.
Scalable Modular Architecture
AXL33 uses modular 5.5 kW power supply units operating in parallel within the shelf. This architecture supports:
- Incremental capacity expansion
- Flexible redundancy (N+0, N+1, N+N)
- Simplified service and maintenance
Hot-swappable modules allow capacity expansion and service without interrupting operation, enabling continuous uptime in critical environments.
Integrated Control and Coordination (PMM)
Each AXL33 shelf includes an integrated Power Management Module (PMM) that provides system-level monitoring and control.
PMM enables:
- Aggregated module monitoring
- Multi-shelf communication via Modbus and CAN
- Automatic addressing across shelves
- Coordinated operation of parallel systems
This control architecture simplifies deployment and supports scalable rack-level power systems.
Modular Battery Backup (BBU)
AXL33 supports a modular Battery Backup Unit (BBU) system designed to provide short-duration ride-through for AI and high-density compute environments. The BBU system:
- Provides scalable ride-through capability
- Uses hot-swappable battery modules
- Supports parallel deployment across shelves
- Integrates with PMM for system-level monitoring
This improves resilience and supports continued operation during upstream power disturbances.
Efficient Rack-Level Power Delivery
By converting AC power at the rack and delivering 50 VDC directly to IT equipment, AXL33 reduces conversion stages and improves overall system efficiency. This approach:
- Reduces power losses
- Simplifies rack power architecture
- Supports higher rack densities
These benefits are critical in AI environments where power efficiency and density directly impact infrastructure performance.
Capacity Guidance
AXL33 is typically deployed in multi-shelf configurations depending on rack power requirements.
- 1 shelf: up to 33 kW
- 2–3 shelves: mid-density AI racks
- 4 shelves: up to 132 kW high-density racks
This modular approach allows capacity to scale with compute demand without redesigning the power architecture.
Deployment Model
AXL33 is designed for AC-fed rack deployments, converting incoming AC power directly to 50 VDC at the rack. This simplifies infrastructure by avoiding upstream DC conversion and enables deployment within existing AC-powered data centers.
Applications
AXL33 is designed for environments requiring high-density rack-level DC power:
- AI and GPU compute clusters
- Hyperscale and cloud infrastructure
- Open Rack / ORv3 deployments
- High-density edge and modular data centers
Related Resources
- DC Power Architecture Overview → https://xpcc.com/dc-power-architecture/
- AX800 — 800 VDC platform → https://xpcc.com/ax800-800vdc-power-platform/
- AX400 — ±400 VDC platform → https://xpcc.com/ax400-400vdc-open-rack-power-platform/
- DX108 — 800 VDC to 50 VDC → https://xpcc.com/dx108-800vdc-to-50vdc-converter/
(Related architectures and alternative approaches.)
Plan Rack Power Infrastructure with Confidence
Work with Xtreme Power to design and deploy rack-level power systems tailored to your application and density requirements.
Prefer to connect directly? Contact our team at sales@xpcc.com or call (800) 582-4524.