The Power Experts

Liebert PSP

The Liebert PSP is an economical, full featured UPS that delivers cost-effective power protection in a compact package. The UPS provides battery-backed outlets and a surge protection-only outlet. The UPS battery offers four minutes of backup power at full load — ample time to shut down protected equipment if an outage occurs. ​​​​

Liebert PSP Features

  • Three battery-backed UPS outlets, and one surge protection-only outlet differentiated by color
  • USB port, MultiLink Software shutdown software, and USB cable
  • User replaceable batteries
  • Up to five minutes of battery backup time at full load
  • Full sequenced battery testing to ensure batteries are available when needed
  • Advance early warning of UPS shutdown
  • RJ-45 port for data line surge protection
  • Site wiring fault indicator (120VAC only)

Liebert Specifications

Models PSP350 MT3-120U PSP500 MT3-120U
Capacity (VA/W) 350/210 500/300
Net Weight, lb. (kg) 6.4 (2.9) 8.8 (4.0)
Dimensions – W x D x H, in. (mm) 3.4 x 8.5 x 9.9 (87 x 215 x 251)
Input Voltage 84-140VAC
Frequency 50/60Hz ±5Hz
Output Voltage (Utility Power Normal) Typical 84-140VAC
Output Voltage (Battery Operation) 120VAC ±5%
On-Battery Wave Form Stepped sinewave
Typical Recharge Time 6-8 hours to 90%
Battery Run Time*- Full Load 3-5 minutes
Battery Run Time* – Half Load 10 minutes
Audible and Visual Audible alarm / LED
Backup Outlets NEMA 5-15R (3)
Surge Outlets NEMA 5-15R (1)
Operating Temperature, °F (°C) 32 to 104 (0 to 40)
For more information about the Liebert PSP, call 800-876-9373, or email