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Standby UPS, 550VA, 300W, 120VAC, 1PH


Price: $136.70 / each

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  • Item # 4GU33
  • Mfr. Model # INTERNET550U
  • UNSPSC # 39121011
  • Catalog Page # 449
  • Shipping Weight 7.5 lbs.
Country of Origin ChinaCountry of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Technical Specs

  • ItemStandby UPS
  • MountingDesk Top/Tower
  • VA Rating550VA
  • Watts300W
  • Input Voltage120VAC
  • Hz60
  • Phase1
  • Input Current10A
  • Output Voltage115/120VAC
  • Backup Time (Half/Full Load)10 min./3.5 min.
  • Number of Outlets(8) 5-15R
  • Outlet Type(4) UPS/Surge, (4) Surge
  • Automatic Volts RegulationNo
  • Fax/Modem Line ProtectionYes
  • Transfer Time4 msec from AC to Battery, 2 msec from Battery to AC
  • Height3.1"
  • Depth5.7"
  • Width10.8"
  • Input Connection6 ft. Cord with NEMA 5-15P Plug
  • PortsUSB (HID Enabled)
  • Special FeaturesComplete Protection For PCs, Workstations And Other Sensitive Electronics In An Attractive Ultra-Compact, Mountable Housing, Widely Spaced Outlets Accommodate Large Transformer Plugs, Free Poweralert Software Enables Safe Unattended System Shutdown Without Data Loss During Extended Outages, Keyhole Mounting Flanges Enable Secure Wallmount Installation
  • StandardsTested to UL1778 (USA), Tested to CSA (Canada), Tested to NOM (Mexico), Meets FCC Part 15 Category B (EMI), ENERGY STAR Qualified
  • Display TypeLED
  • IncludesINTERNET550U UPS System, USB Cable, Instruction Manual
  • Green Certification or Other RecognitionENERGY STAR Rated

Compliance and Restrictions

  • Hazardous material - General

  • Green Product - This item has been designated by the manufacturer as an environmentally preferable product (EPP) because this item is ENERGY STAR Rated.


This standby UPS system is designed to provide cost-effective backup power and power protection for an individual computer.

• USB port
• Fax/modem line surge suppression

Product content provided by supplier

Alternate Products

Rated 4.4 out of 5 by 20reviewers.
Rated 4 out of 5 by works great out of the box Simple device, simple set up, plugged it in and it works. January 29, 2015
Rated 4 out of 5 by good and bad Has been doing a good job. Dislike that you can't turn it on without it making the harsh warning sound. Power went out the other night and so did the computer system, so I guess the internal battery has failed which is pretty typical no matter what brand I've used. October 1, 2014
Rated 5 out of 5 by Solid, working UPS Having watched more than a couple power outages shut everything else down, it was great having a little more time to also shut down my PC and monitor.After several outages through which the Internet 550U protected my gear, I'm a believer and this is all the backup needed. October 1, 2014
Rated 1 out of 5 by Failed after less than a month I originally had a Belkin UPS that lasted for years, far beyond it's warranty. Then I went to my local Electronics store and all they had was TrippLite UPS. I bought it and it died a month after it's warranty expired. Went and got another, and it died in less than a month. Returned it and got a APC. Works just fine. We'll see how long it lasts. Can't honestly recommend TrippLite. October 1, 2014
Rated 5 out of 5 by Excellent product/ excellent customer service I have had wonderful success with the UPS 550VA. I had what I thought was a problem and called customer service. The error was with our purchasing department not verifying the amount of wattage we needed for the battery back up side. Customer service went over every item we had plugged into the battery backup side and within minutes found that there was too much voltage plugged in. I was able to immediately fix my problem. Thank you to your customer service for friendly, and prompt help. My Tripp-Lite works wonderfully. September 23, 2013
Rated 5 out of 5 by It's there when the power fails. What I want of a UPS is that it be quiet, unobtrusive and there when I need it. This UPS does that for our workstations. September 9, 2013
Rated 5 out of 5 by Great product! Just set it up nand forget about it. Very easy to set up. You only have to follow the instructions to perform the required downloads. It has prevented computer damage due to small power fluctuations that would cause my computer to shut down. It also safely shuts down your computer if it is left unattended during a sustained power outage. A very valuable feature is if you have have phone service through a cable company you can maintain phone service for a long period if the power is out in an emergency situation. September 5, 2013
Rated 5 out of 5 by Saved my modem, router and alarm monitoring modem Prior to Hurricane Ike our power was not the best, after it was horrendous and I lost several devices due to surges. I invested in several Tripp -Lite 550U's and I haven't lost anything connected to it in 2 years. I have no doubt they have saved my devices several times during power failures and surges. An added bonus is after the generator (installed due to the flaky power) fires up I don't have to wait for all the devices to boot up, they ride through it without a hitch. September 5, 2013

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