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Product Family

Liebert STS2-PDU Static Transfer Switch-Power Distribution Unit

Provides power distribution and automatic switching between two different AC power sources such as different UPS systems.

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Best Suited For:
  • Banking, Financial and Insurance
  • Data Center/Colocation/Hosting
  • Healthcare
  • Education
  • Retail and Wholesale
Warranty: One Year Limited Warranty Against Defects in Material and Workmanship

The Liebert STS2-PDU from Vertiv is making it easier to protect your critical equipment by giving your single cord loads the reliability of dual cord power or by providing added redundancy to your dual cord devices. With a single, space-saving unit, the Liebert STS2-PDU static transfer switch/power distribution unit provides power distribution and automatic switching between two different AC power sources. The Liebert STS2-PDU is available in 250A, 400A, 600A and 800A systems, in both 60Hz and 50Hz. Multiple input voltages are available. Designed for use in dual-bus power applications, this solution combines fast switching between AC power sources, power isolation, distribution, monitoring and grounding into a single package.

Model Specifications Overview
Liebert STS2-PDU 250 Amp
250 amps   208, 380, 400, 415, 480, 600 VAC   77 in   73 in   32 in   3393 lbs  
Liebert STS2-PDU 400 Amp
400 amps   208, 380, 400, 415, 480, 600 VAC   77 in   73 in   49 in   4608 lbs  
Liebert STS2-PDU 600 Amp
600 amps   208, 380, 400, 415, 480, 600 VAC   77 in   73 in   49 in   5692 lbs  
Liebert STS2-PDU 800 Amp
800 amps   480 and 600 VAC   77 in   97 in   49 in   8618 lbs  


Operates efficiently
Triple redundant logic with dual power feeds
Compact single cabinet conserves valuable floorspace compared to non-packaged solutions
A choice of distribution options to fit site requirements
Grounding automatically establishes a single point ground to meet manufacturer and code requirements
Fully compatible with the non-linear loads of modern computer systems and other electronic equipment
Standard on-unit monitoring and optional centralized monitoring capability provide continuous system visibility
Lowest Total Cost Of Ownership When applied as primary side switching, costs are lower due to requiring only one power distribution unit, a lower current due to 480V vs. 208V, and lower installation and wiring costs
Single cabinet design reduces installation time and cost UL listed as complete system 


100% rated, fuseless design
Static transfer switch with distribution
Provides computer-grade grounding Installs and maintains easily

Find Your Area Contact

Products Support Contacts

Showing contacts for Virginia, 20149, USA Change
Chloride Industrial UPS Services
+1 800 442 7489
Product areas of focus:
Emergency Response for Services
+1 800 543 2378
Product areas of focus:
Geist Support - Americas (Rack PDU and Watchdog)
+1 888 630 4445
1777 Yolande Avenue Lincoln Nebraska USA
Product areas of focus: Power Distribution, Monitoring

Frequently Asked Questions

Do I need a static switch in my power distribution system?
There are many ways to design a power backup and distribution system. Please reference our white paper on Emerging Power Architectures in the Reports section on this web page or consult your local sales office for suggestions on how best to leverage and compare your existing equipment, power system goals and our capabilities.
Can the product be customized?
There are many custom solutions available for our products. Please contact your local sales office for more information.
Can circuits be added without powering the unit down?
OSHA defines safety procedures for energized equipment. You may also have local codes or standards to follow. Beware of competitors who state without details that it is okay to work on energized equipment.
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