Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
+1 (773) 869-1774
+1 (773) 869-1329

Protect It! 3-Outlet Desktop-Grommet Surge Protector, 10 ft. Cord, 900 Joules, 2 USB Charging Ports, RJ45, Black Housing

Installs in your desktop’s pre-cut grommet to safeguard your computer, scanner and other electronics against surges, spikes and line noise, as well as charge mobile devices, including smartphones, tablets and MP3 players.
  • Pushes down flush with desktop surface when not in use
  • 3 NEMA 5-15R outlets, 2 USB charging ports and RJ45 port
  • 900 joules of surge suppression
  • Designed for installation in 63.5mm (2.5 in.) grommet
  • 10 ft. power cord reaches distant AC outlets

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$50.91 Avg. Price
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The TLP310DMUSB Protect It!® 3-Outlet Surge Protector features three NEMA 5-15R outlets and a surge suppression rating of 900 joules to protect your components against surges, spikes and EMI/RFI line noise that can damage sensitive electronics and destroy data. Plus, two USB ports produce 2.4A of combined power to charge your mobile devices, such as smartphones, tablets and MP3 players. An RJ45 port provides protection for your 10/100 Mbps Ethernet data connection.

Recommended for home or office workstations, the TLP310DMUSB is designed for installation in your desktop’s 63.5-millimeter (2.5 inches) grommet hole (if your desk has no pre-cut hole, you can drill one yourself). It folds onto the desktop for connection of equipment. An LED indicates surge suppression at a glance. A resettable 15A circuit breaker shuts down equipment in case of an overload.

When not in use, straighten the TLP310DMUSB to a vertical position and push it down into the grommet until it’s flush with the desk surface. The 10-foot power cord is long enough to reach distant AC outlets. Permanent mounting to the desk helps deter theft.

Tripp Lite will repair or replace any connected equipment damaged by surges, including direct lightning strikes, up to $20,000 for life (valid in the U.S., Canada and Puerto Rico only).


Powers and Protects Electronic Components
  • 3 NEMA 5-15R outlets accept most computers and peripherals
  • 900 joules of surge suppression protect against surges, spikes and EMI/RFI line noise
  • Easy-to-read LED indicates surge suppression at a glance
  • Resettable 15A circuit breaker protects against overloads
  • Recommended for home or office workstations

Powers and Charges Mobile Devices
  • 2 USB ports (2.4A total) charge smartphones, tablets and other devices
  • RJ45 jack protects 10/100 Ethernet data connection

Mounts Safely in Desktop’s Grommet Hole
  • Designed for installation in 63.5 mm (2.5 in.) grommet
  • Folds onto desktop for connecting equipment
  • Pushes into the grommet hole flush with desktop when not in use
  • 10 ft. power cord stores away out of sight under the desk
  • Permanent mounting helps deter theft

$20,000 Ultimate Lifetime Insurance
  • Tripp Lite will repair or replace any connected equipment damaged by surges, including direct lightning strikes, up to $20,000 for life
  • Valid in the U.S., Canada and Puerto Rico only

Package Includes

  • TLP310DMUSB Protect It! 3-Outlet Desktop-Grommet Surge Protector
  • Mounting clips
  • Owner’s manual
RoHS compliant


UPC Code037332199645
Product TypeSurge Protector
Charging Form FactorStrip
Device CompatibilityPhone; Tablet; Amazon Kindle
Nominal Input Voltage(s) Supported120V AC
Recommended Electrical Service120V
Input Cord Length DetailsStrip
Voltage Compatibility (VAC)120
Input Plug TypeNEMA 5-15P
Input Cord Length (ft.)10
Right-Angle PlugNo
Integrated Cord ClipNo
Output (Watts)1800
Output Receptacles(3) 5-15R
Circuit Breaker (amps)15
Right-Angle OutletsNo
Diagnostic LED(s)Yes
Number of Charging Ports2
Charging Ports / Amps(2) 2.4A
Charging MethodUSB
Charging Port TypeUSB A (FEMALE)
AC Suppression Joule Rating  900
AC Suppression Response Time  < 1ns
Protection ModesIncludes full normal mode (H-N) and common mode (N-G / H-G) line suppression
Clamping Voltage (RMS)  500
UL1449 Let Through Rating500,500,500
EMI / RFI Filtering  Yes
ImmunityConforms to IEE 587/ANSI C62.41
Automatic Shut-Off  Yes
Telephone/DSL ProtectionNo
Cable (Coax) ProtectionNo
Network (Ethernet) ProtectionYes
Antimicrobial CoatingNo
Color (AC Line Cord)Black
Housing ColorBlack
Integrated Keyhole Mounting SlotsNo
Material of ConstructionPlastic
Receptacle ColorBlack
Shipping Dimensions (hwd / in.)3.00 x 14.40 x 5.10
Shipping Weight (lbs.)2.70
Unit Dimensions (hwd / in.)11.02 x 2.86 x 2.48
Network Speed10/100 Mbps
Rotatable OutletsNo
UL1449 3rd Edition (AC Suppression)UL1449, UL962A
Product Warranty Period (Worldwide)Lifetime limited warranty
Connected Equipment Insurance (U.S., Canada & Puerto Rico)$20,000 Ultimate Lifetime Insurance 

Frequently Asked Questions

When a surge protector has been compromised (due to a single event like a lightning strike or over a series of spikes and surges), many surge protectors will use an audible or LED alert only. If these alerts are missed, your equipment will receive unprotected power without your knowledge. When a surge protector with automatic shutoff has its protection compromised, it will prevent power from reaching connected equipment entirely. This both protects the equipment and provides a timely and clear indicator that a new surge protector is needed.
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+1 (773) 869-1774

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+1 (773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

+1 (773) 869-1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at +1 (773) 869-1774 or email