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Compact rectangular UPS unit in matte black finish with eight front outlets and USB port

Vertiv

Vertiv Liebert PST5-660MT120 660VA 400W UPS 8 Outlets 120V

SKU CH-TKXW-3CW9S MPN PST5-660MT120

Battery backup with 660VA capacity and 400W output protects eight outlets plus network and coax lines

  • International Version120V
  • Input Voltage Range90 V AC - 145 V AC
  • Input Frequency60 Hz, +/- 5 Hz, autosensing
  • Input ConnectionNEMA 5-15P
  • VA Rating660 VA
  • Watts400W

VA 660 VA

  • 660 VA / 400 W capacity protects workstations and gaming rigs during outages
  • Eight NEMA 5-15R outlets include four battery-backed and four surge-only ports
  • USB charging port and RJ45/Coax surge protection safeguard connected devices
  • Energy Star certification confirms efficient power conversion for lower running costs
  • Compact 3.82" x 12.00" x 6.24" design fits wall, desktop or floor mounting

Capacity and use

The Vertiv Liebert PST5-660MT120 is a 660 VA / 400 W offline UPS designed to keep desktop computers, gaming consoles, workstations, routers and similar electronics running during brief outages. It provides battery-backed power for a short window so users can save work and shut down safely. Buyers who need extended runtime for servers or high-power workstations will find the capacity insufficient.

Input limits and protection

The unit accepts 90 V AC to 145 V AC at 60 Hz and connects via a NEMA 5-15P plug with a 6.5 ft cord. It supplies 120 V AC output through eight NEMA 5-15R receptacles, four of which provide both battery backup and surge protection while the other four are surge-only. Surge energy rating is 316 Joules and RJ45/11 plus coax data-line protection is included.

Mounting and daily implications

The UPS measures 3.82" x 12.00" x 6.24" and weighs 9.40 lbs, allowing wall, desktop or floor placement. Two outlets are spaced for transformer-block plugs and a USB charging port is provided. A USB Type-A to Type-B cable enables communication with the free shutdown software. Valve-regulated lead-acid batteries deliver 2 minutes at full load and 7 minutes at half load.

Highlights

  • 660 VA / 400 W capacity protects workstations and gaming rigs during outages
  • Eight NEMA 5-15R outlets include four battery-backed and four surge-only ports
  • USB charging port and RJ45/Coax surge protection safeguard connected devices
  • Energy Star certification confirms efficient power conversion for lower running costs
  • Compact 3.82" x 12.00" x 6.24" design fits wall, desktop or floor mounting

Specifications

BrandVertiv
SeriesLiebert PST5
ModelPST5-660MT120
International Version120V
Input Voltage Range90 V AC - 145 V AC
Input Frequency60 Hz, +/- 5 Hz, autosensing
Input ConnectionNEMA 5-15P
VA Rating660 VA
Watts400W
Output Voltage120V
Outlets8
Outlet TypeNEMA 5-15R
Battery TypeValve Regulated Lead Acid (VRLA)
Battery Run TimeFull Load: 2 min
Half Load: 7 min
Surge Energy Rating316 Joules
Dimensions3.82" x 12.00" x 6.24"
Weight9.40 lbs.
Shipping weight3.74 kg
Package size378 × 249 × 157 mm

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Questions about this item

How do I decide between the 660 VA and 850 VA models?

The 660 VA model delivers 400 W and 2 minutes at full load, while the 850 VA model supports a higher load; choose the 660 VA when your equipment draws 400 W or less.

What does the 400 W rating mean for my desktop and monitor?

It means you can run a typical desktop and monitor drawing up to 400 W for about 2 minutes on battery, giving time to save work and shut down.

What does the USB port on this UPS actually do?

The USB Type A to B cable connects to a PC for notifications and controlled shutdown using the free software download.

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