The Eaton 3S UPS provides up to 30 minutes of high efficiency and energy-saving battery backup and surge protection for your home and office equipment. The plug-and play functionality of the 3S standby UPS allows you to start backing up your equipment the moment its taken out of the box, with automatic integration with Windows, Mac and Linux through a simple connection to a USB port on most models. The 3S manages your energy efficiency for you with an available EcoControl function (3S750 model only) that automatically disables peripherals when the master device is turned off, providing up to 30 percent greater energy savings than typical battery backups. The sleek design of the 3S home UPS fits neatly under the desk, in an entertainment center or on the wall. Applications include: Residential, retail, banks. Protected equipment may include: Routers and home networking devices, TVs, entertainment centers and other electronic equipment. The UPS arrives with the internal batteries disconnected for safety during shipping. Please be sure to connect the internal batteries prior to startup for normal operation. For troubleshooting, technical support, and warranty issues, please contact Eaton service directly at 1-(800)-356-5737, option 1 for technical support, or request support at

Technical Specifications

Product Dimensions13.2 x 5.5 x 3.4 inches
Item Weight6.6 pounds
Item model number3S350
Batteries1 12V batteries required.
Customer Reviews4.4 out of 5 stars 541 ratings 4.4 out of 5 stars
Best Sellers Rank#820 in Computer Uninterruptible Power Supply Units
Is Discontinued By ManufacturerNo
Date First AvailableAugust 6, 2012
Model Name3S350
Connector TypePower NEMA 5-15
Output Wattage200 Watts
Wattage200 watts
Item Dimensions LxWxH13.2 x 5.5 x 3.4 inches
Item Weight2996 Grams