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Redundant Power for High-Density Servers without Redundant Power Supplies

3-Phase Auto Transfer Switch Rack Power Distribution Units

Streamline your installations and reduce data center costs with each server rack!

  • Delivery of up to 8.6, 12.5 or 17.3kW of redundant 208V AC power to servers without requiring redundant power supplies
  • Dual inputs for connecting separate A (primary) and B (secondary) 3-phase power sources
  • Patented ATS technology (U.S. Patent 9,467,006) provides rapid coordination of unsynchronized phases without dropping loads
  • Unique hybrid of solid-state and electromechanical relay switching provides the best features of both
  • Ultra-fast transfer in less than 6 milliseconds
  • Multifunction digital display for local monitoring
  • Built-in network interface for remote monitoring
  • Only 1U of rack space required for ATS
  • Field-proven performance, reliability and efficiency for data center applications
3-phase automatic-transfer switch PDU

Provide redundant power to a rack that has clustered 1U servers.

Traditional Dual
PDU Solution

ATS Solution

The Eaton Advantage

Two 3-phase rack PDUs feed single-phase 208V loads 3-phase rack ATS feeds single-phase 208V loads
  • Simplified network management with a single ATS per rack to monitor
Two power supplies per server One power supply per server; the Eaton ATS provides redundant power to each server power supply, so a second power supply is not required
  • Fewer power supplies to purchase
  • 2–4% gain in efficiency, depending on the power supply used(1)
  • Reduced electricity costs
  • Reduced cooling costs
Two power cords per server One power cord per server
  • Fewer power cords to purchase
  • Simplified cable management
  • Improved airflow, allowing servers to run cooler and last longer
  • Improved service access

The Eaton ATS can also provide redundant power to a single-cord top-of-rack switch, eliminating the need to purchase a separate ATS dedicated to the switch. (1) The estimated efficiency gain assumes 80 PLUS® certified power supplies, with dual power supplies loaded at 25% compared to single power supplies loaded at 50%.

Lower Hardware Costs
  • Eliminates cost of second power supply per server
  • Eliminates cost of second power cord per server
Simplified Management
  • Eases network management with only one ATS to monitor
  • Reduces cable clutter for better organization, improved airflow and easier access
Lower Operating Costs
  • Increases efficiency of server power supplies
  • Reduces cooling costs due to power supply efficiency gain
  • ATS operates at a high level of efficiency
Efficient Use of Rack Space
  • Saves valuable rack space with less hardware
  • May reduce rack weight and floor loading

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We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at +1 773-869-1776 or email