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Eaton 3S UPS, 550 VA/330 Watts

Provides battery backup and surge protection for up to eight home and office devices.


Limited Quantity In Stock
Typically Ships within One Week
3 YEAR DoubleDiamond™ Warranty (Standard)

*Required field

Product Features

  • Provides reliable backup power, enabling you to perform an orderly shutdown of your computers when the power goes out.
  • Four outlets with surge protection and battery backup plus four outlets with surge protection only. One of each type has transformer spacing.
  • Compact design for desktop use.
  • Easily managed through the USB port using Windows®, Mac®, or Linux® operating systems (no drivers required).
  • User-replaceable, maintenance-free batteries.
  • Start-on-battery feature enables you to start the UPS without utility input.
  • Tech Specs

    Battery Type Sealed, lead-acid
    Environmental Operating temperature: 32 to 104° F (0 to 40° C);
    Storage temperature: 5 to 122° F (-25 to +50° C);
    Humidity: 20-93%, noncondensing
    Runtime @ 300 watts: 4 minutes
    Connectors Power outlets: (4) 5-15R, (4) 5-15R surge only; (2) RJ-45; (1) USB Type B
    Indicators LEDs: (1) Power
    Power Input: 89-151 VAC, 57-70 Hz; On utility voltage regulation: 102-132 VAC;
    On battery voltage regulation: -10%, +6% of nominal;
    Power factor: 0.6;
    Efficiency (normal mode): >97%;
    Efficiency (on battery): 75%;
    Frequency regulation: 0.1 Hz;
    Transfer time: 1-4 ms typical;
    Load segments: Two groups of two controlled outlets
    Dimensions 3.4"H x 5.5"W x 13.2"D (8.6 x 14 x 33.5 cm)
    Weight 7.3 lb. (3.3 kg)
    Warranty 2 years

    NOTE: Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.


    Double Diamond Warranty Diamond

    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Eaton 3S UPS, 550 VA/330 Watts comes with a standard 3 Year warranty already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.