About this UPS
- Brand: Eaton
- Product Type: Standby UPS
- Manufacturer Part Number: 3S550
- Input Voltage: 110 V AC
- Form Factor: Desktop
- Plug/Connector Type: NEMA 5-15P
- Product Family: 3S
- Backup/Run Time (Half Load): 10 Minute
- Backup/Run Time (Full Load): 3 Minute
- Load Capacity: 550 VA/330 W
Marketing Information:
The sleek, new Eaton 3S delivers high efficiency and energy-saving battery backup and surge protection for your premium home and office equipment - ready to go right out of the box.
| PRODUCT SPECIFICATIONS | |
|---|---|
| Plug/Connector Type | NEMA 5-15P |
| Receptacle Type | NEMA 5-15R |
| Receptacle Detail | 4 x NEMA 5-15R |
| Transfer Time | 4 ms |
| Load Capacity (VA) | 550 VA |
| Load Capacity (Watt) | 330 W |
| Input Voltage | 110 V AC |
| Output Voltage | 132 V AC |
| USB | Yes |
| Battery Characteristics | Maintenance-free, Sealed |
| Battery Chemistry | Lead Acid |
| Backup/Run Time (Full Load) | 3 Minute |
| Backup/Run Time (Half Load) | 10 Minute |
| Height | 3.40" (86.36 mm) |
| Width | 5.50" (139.70 mm) |
| Depth | 13.20" (335.28 mm) |
| Form Factor | Desktop |
| Weight (Approximate) | 3.31 kg |
| Country of Origin | Philippines |
| Limited Warranty | 3 Year |
Technical specifications
How long it'll keep your equipment up.
Manufacturer-specified runtime at typical loads. Real-world figures depend on battery age, ambient temperature, and load profile.
Estimate based on manufacturer-specified runtime curve. Real-world runtime varies with battery age, ambient temperature, and load profile.
Before you order
How do I know this UPS will run my equipment?
Add up the wattage draw of every device you'll plug in (servers, switches, monitors). The UPS's wattage rating — not VA — is the number that matters. Aim for the UPS to run at 60–70% of capacity at full load: this gives headroom for inrush current and a meaningful runtime margin. Email us your equipment list and we'll size the right UPS within one business hour.
What's covered by the warranty, and how long does it last?
New units carry the full manufacturer warranty registered to you on receipt. The manufacturer handles claims directly via their North American support channel. Refurbished units are covered by our own 1-year UPSPLUSBATTERY warranty handled in-house in Canada.
Can I extend runtime beyond what's shown above?
Many Smart-UPS-class models accept an external battery pack (XBP) connected to the rear battery port. If this UPS shows "Extended Runtime Capable: Yes" in the spec grid above, an XBP is supported. Compatible XBPs and the runtime gain they deliver vary by model — contact us if you don't see the right XBP in our catalogue.