Pictures may differ from actual products

Eaton 3S 850 FR (Gen 2)

Off-line UPS 850VA with FR sockets

139€95
Recycling charge of 0€13
Create a price drop alert
Inverter power (VA):
  • 450 VA

    89€95
    In stock
  • 550 VA

    109€95
    In stock
  • 700 VA

    119€95
    In stock
  • 850 VA

    139€95
    In stock
Overview

Off-line UPS for effective protection of your computer/multimedia system

The Eaton 3S 850 FR Gen 2 Off-Line UPS provides effective protection for your computer and computer peripherals. Your equipment will be protected against mains overloads and lightning strikes. In the event of a power failure, this UPS will give you time to save your work in progress and shut down your machine with peace of mind.

The Eaton 3S 850 FR Gen 2 UPS offers complete protection for your PC and its peripherals, your TV & Home Cinema equipment, your internet box, your consoles... whether it is a private or professional installation.

Protection against the main electrical problems

The Eaton 3S Gen 2 UPS ensures effective protection of your equipment against frequent events such as power grid overloads and storms, which disrupt the mains without warning.

In the event of a power failure, the 3S Gen 2 runs on battery power, giving you ample time to save your work in progress. For added security, the shutdown software, supplied with the UPS, automatically saves your data and shuts down your applications before your batteries run out. A 10A thermal circuit breaker protects the system from overloading.

Main features :

  • Off-line UPS with 850 VA / 510 Watts of power
  • 8 electrical outlets: 4 corrugated and overvoltage protected + 4 overvoltage protected outlets only
  • Input protection with 10A resettable circuit breaker
  • On/off button with LED indicator
  • Replaceable battery (sealed lead acid)
  • 20 minute runtime with a desktop computer
  • USB port (HID compatible) for automatic integration with most operating systems (Windows, Linux and Mac OS)
  • Phone line/xDSL protection
  • 2 USB ports (2A max) for charging
  • 2-year manufacturer's warranty (standard exchange, including battery)
Logistics information : This product is available in the following locations: France, Belgium, Luxembourg, Switzerland, Spain, Italy, Monaco.
Specifications
Select your criteria

General information

Product name

Eaton 3S 850 FR (Gen 2)

Brand

Eaton

Model

3S850F

Main characteristics

Technology

OFF-Line

Type of product to protect

Personal PC / Hi-Fi installation

Inverter power (VA)

850 VA

Inverter power (W)

510 W

Scalable

No

Manageable

No

Connectivity

Number of sockets

8

Connector(s)

2 X USB
8 X French plug
1 X 2P + T socket Female

Physical characteristics

Power inverter format

Extension leads

Width

170 mm

Length

335 mm

Thickness

86 mm

Weight

4.3 kg

Warranties

Commercial warranty

Legal warranty

Safety Information

Responsible person

Eaton Industries (France) SAS

Postal address

110 Rue Blaise Pascal 38334 Montbonnot Saint-Martin France

Electronic Address

eif_compliance@eaton.com

Product referenced on 24 Jan 2020

Customer reviews
  • 79%
    91 reviews
  • 10%
    12 reviews
  • 5%
    6 reviews
  • 3%
    3 reviews
  • 3%
    3 reviews
  • by JeanChristopheF
    Posted on 27 May 2026
    Bought on 29 Apr 2026 from LDLC
    Number of reviews: 1 Average rating: 10

    Perfect

    Very good equipment, easy to use. Fulfills its function and it does not take up much space.

    Model: Eaton 3S 450 FR (Gen 2)
    Review automatically translated
  • by ChristianL
    Posted on 22 Apr 2026
    Bought on 24 Mar 2026 from LDLC
    Number of reviews: 2 Average rating: 6

    Very satisfied with the purchase for a NAS Synology DS 220+

    The UPS was automatically recognized by the Synology. I connected the Freebox, the alarm system and the Raspberry to it on battery backup. Phone and others on non-backup but protected from power surges. I didn’t test the power outage duration to know how long the whole setup was backed up. But generally these are sudden outages in winter due to a limit of my electricity subscription. For EDF outages of more than 15 min, I only expect a simple proper shutdown of the NAS.

    Model: Eaton 3S 850 FR (Gen 2)
    Review automatically translated
  • by GuilhemG
    Posted on 7 Apr 2026
    Bought on 10 Mar 2026 from LDLC
    Number of reviews: 3 Average rating: 7

    Protected power strip with battery

    A warm welcome in the shop.
    Staff available and approachable.
    Only small "hiccup", from time to time the device starts beeping and I don't know why.

    Model: Eaton 3S 700 FR (Gen 2)
    Review automatically translated
  • by Romain V.
    Posted on 5 Apr 2026
    Bought on 12 Nov 2025 from LDLC
    Number of reviews: 3 Average rating: 8

    A good inverter

    Spotted on the site beforehand, then purchased in-store depending on stock, sound advice from the LDLC staff on site, completely satisfied with my purchase.

    Model: Eaton 3S 550 FR (Gen 2)
    Review automatically translated
  • by Jepeto
    Posted on 27 Feb 2026
    Bought on 30 Jan 2026 from LDLC
    Number of reviews: 2 Average rating: 9

    Good product

    This UPS was easy to install.
    It is recognised and managed by the Synology server it protects.
    It worked well during two power outages caused by storms.
    It remains to be seen how long the batteries will last.
    I recommend it.

    Model: Eaton 3S 850 FR (Gen 2)
    Review automatically translated

In the same universe: eaton | eaton 3s 850