CDW Logo

Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V 50/60Hz DB9 RJ11 PC - UPS - 300 Watt - 550 VA

Mfg.Part: INTERNET550SER CDW Part: 845465
Quick tech specs
  • Desktop Internet Office desktop standby 8 outlet Uninterrupted Power Supply protects your computer and its peripherals from blackouts brownouts power surges and line noise that can damage or destroy equipment wipe out valuable data
  • Single-line RJ11 jack protects phone/fax line against surges
  • DB9 Serial Monitoring
  • 4 battery supported and 4 surge-only outlets
  • 122 min runtime at half load; 33 min at full load
  • Tripp Lite is now a part of Eaton
View All

Know your gear

Ultra-compact standby UPS with built-in DB9 serial monitoring port protects PCs, network workstations and other systems reliant upon a contact-closure serial interface for UPS monitoring and unattended system shutdown. Maintains AC output during blackouts and brownouts starting at 99V. Includes DB9 monitoring port with cabling, TEL/DSL line surge suppression, surge-only outlets and LED indicators. PowerAlert software available free via download.


• INTERNET550SER standby UPS offers protection from blackouts, brownouts and surges on both AC and dialup modem lines

• Provides seamless battery derived AC output during blackouts and severe brownouts so that connected equipment can be shut down without data loss

• Built-in DB9 contact closure interface port enables automatic system shutdown if power fails while the system runs unattended

• PowerAlert software available via free download from, cable included

• 4 battery supported outlets protect computer, monitor and one vital system peripheral, plus 4 additional surge suppression-only outlets for printers and other system accessories not requiring battery support

• Built-in single line phone jacks protects peripherals with a standard dialup phone line connection, phone cable included

• Built-in audible alarm and front panel LEDs offer continuous status information regarding line and battery power operation

• 550VA /300 watt power handling ability supports entry-level PC systems for several minutes during power fail conditions

• Ultra-compact housing fits anywhere, wall mountable

• Includes attached 6 ft. AC power cord, on/off power switch

• Compatible with 120V / 60 Hz applications in USA, Canada, Mexico and other countries

• 2 year warranty (worldwide), plus $100,000 connected equipment insurance (USA and Canada only)

• 8 outlets (4 UPS/surge, 4 surge-only)

• DB9 serial interface port and free software (web download) facilitate unattended shutdown

• Built-in jacks provide complete 1-line phone/DSL surge suppression

• Compact cabinet design fits easily on or under any desk, wall mountable

• $100,000 Ultimate Lifetime Insurance (USA, Puerto Rico and Canada only)

Package Includes:

INTERNET550SER standby UPS system

DB9 serial cable for use with PowerAlert UPS monitoring software

Telephone cable for use with single line dialup surge suppression

Instruction manual and warranty information
Advertised Price
Availability: 3-5+ Days
Enhance your purchase

Better Together

Current Item
Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V 50/60Hz DB9 RJ11 PC - UPS - 300 Watt - 550 VA

This Item: Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V 50/60Hz DB9 RJ11 PC - UPS - 300 Watt - 550 VA


Total Price:
Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V DB9 RJ11 PC is rated 5.00 out of 5 by 2.
Rated 5 out of 5 by from Great price - very light wight Used to backup a desktop tower style PC. Works great.
Date published: 2018-11-11T00:00:00-05:00
Rated 5 out of 5 by from Love this unit! I am an application developer and work from home 50-hours per week. We get temporary outages (10 seconds to 4 minutes) on a weekly basis and my two INTERNET550SER's keep my laptop, 4 monitors and Internet connection up and running. I love these units. I can plug them in and feel confident that my equipment will stay powered.
Date published: 2014-10-01T00:00:00-04:00