Eaton 3S850B 3S Gen2 Desktop UPS, 0.85 kVA 510 W, 8 AC Outlets, 2 USB Ports
Original price was: £164.39.£155.12Current price is: £155.12.
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About this item
- 510 W output power with 0.85 kVA capacity
- Standby (offline) UPS topology
- Eight AC outlets for connected equipment
- Two USB 2.0 ports for device charging
- Battery backup and surge protection
- Tower design measures 335 × 170 × 85 mm
- IEC/EN 62040-1 and IEC/EN 62040-2 compliant
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Eaton 3S850B – desktop backup and surge protection
The Eaton 3S850B suits home offices and small setups that need backup power and surge protection. Its 510W output helps keep essential equipment running during an outage, while eight AC outlets provide flexible connections.
Key specifications at a glance
| Metric | Specification |
|---|---|
| Output capacity | 0.85 kVA / 510W |
| UPS topology | Standby (offline) |
| AC outlets | 8 |
| USB ports | 2 USB 2.0 |
| Input voltage range | 184–264V |
| Dimensions | 335 × 170 × 85mm |
Keep essential equipment protected
This UPS combines battery backup with surge protection. Use it with a desktop computer, network equipment, gaming console or other essential devices. Its standby design suits everyday protection at home or in a small office.
The unit has eight AC outlets, so you can connect several devices in one place. However, check the combined load before connecting equipment. The maximum output is 510W.
Stay connected during a power cut
The 12V, 9Ah sealed lead-acid battery provides backup power. Cold-start support lets the UPS start from battery power when mains power is unavailable. Automatic battery testing helps monitor battery readiness.
For longer outages, Eaton software can shut down a connected computer gracefully. This helps protect work and data. An included USB cable supports the connection.
Charge devices and place it neatly
Two USB ports provide up to 2A total for charging mobile devices. LED indicators show the UPS status, while its 25dB noise level supports quieter work areas.
The tower design measures 335 × 170 × 85mm and weighs 4.3kg. Its 1.5m cable offers some flexibility when positioning the unit. Wall mounting is also possible.
Check these points before ordering
- Confirm the total power draw of connected equipment stays within 510W.
- Check that eight AC outlets suit the devices you plan to connect.
- Confirm you have space for the 335 × 170 × 85mm tower and its cable.
- Check that your computer has a USB connection available for software-assisted shutdown.
Frequently Asked Questions
Q: How many AC outlets does the Eaton 3S850B have?
A: It has eight AC outlets.
Q: What is its maximum output power?
A: Its maximum output power is 510W, with a capacity of 0.85 kVA.
Q: Can it start when mains power is unavailable?
A: Yes. It supports cold start from battery power.
Q: What battery does it use?
A: It uses a 12V, 9Ah sealed lead-acid battery.
A practical choice for home and office setups
We recommend the Eaton 3S850B for buyers who want backup power and surge protection for essential desktop or network equipment. Its eight AC outlets, 510W output and USB charging make it a versatile fit for compact work areas.
| Power | |
|---|---|
| Output power | 510 W |
| Input operation voltage (min) | 184 V |
| Input operation voltage (max) | 264 V |
| Output operation voltage (min) | 220 V |
| Output operation voltage (max) | 230 V |
| Efficiency | 98% |
| Output power capacity | 0.85 kVA |
| Ports & interfaces | |
| Cable length | 1.5 m |
| USB port | Yes |
| AC outlets quantity | 8 AC outlets |
| USB 2.0 ports quantity | 2 |
| Performance | |
| UPS topology | Standby (Offline) |
| Number of output phases | 1 |
| Number of input phases | 1 |
| LED indicators | Yes |
| Surge protection | Yes |
| Power protection features | Overdischarge |
| Noise level | 25 dB |
| Features | |
| Output frequency | 50/60 Hz |
| UPS topology | Standby (Offline) |
| Number of output phases | 1 |
| Number of input phases | 1 |
| Output power | 510 W |
| Input operation voltage (min) | 184 V |
| Input operation voltage (max) | 264 V |
| Output operation voltage (min) | 220 V |
| Output operation voltage (max) | 230 V |
| Efficiency | 98% |
| Surge protection | Yes |
| Power protection features | Overdischarge |
| Noise level | 25 dB |
| Output power capacity | 0.85 kVA |
| Input frequency | 46/70 Hz |
| Battery | |
| Battery voltage | 12 V |
| Battery capacity | 9 Ah |
| Battery technology | Sealed Lead Acid (VRLA) |
| Hot-swap battery | No |
| Cold start | Yes |
| Automatic battery test | Yes |
| Design | |
| Form factor | Tower |
| LED indicators | Yes |
| Product colour | Black, White |
| Safety | IEC/EN 62040-1, IEC/EN 62040-2 |
| Certification | IEC/EN 62040-1, EAC, IEC/EN 62040-2, IEC/EN 62040-2 CE |
| Cable length | 1.5 m |
| Operational conditions | |
| Operating relative humidity | 0 - 85% |
| Operating altitude | 0 - 2000 m |
| Technical details | |
| Output frequency | 50/60 Hz |
| Compliance certificates | CE, EAC |
| Weight & dimensions | |
| Weight | 4.3 kg |
| Width | 335 mm |
| Height | 170 mm |
| Depth | 85 mm |
| Packaging data | |
| Cables included | USB cable |
| Rack mount kit | No |
| Certificates | |
| Safety | IEC/EN 62040-1, IEC/EN 62040-2 |
| Certification | IEC/EN 62040-1, EAC, IEC/EN 62040-2, IEC/EN 62040-2 CE |
| Packaging content | |
| Cables included | USB cable |
| Rack mount kit | No |
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