Ubiquiti USW-48: front panel, ports and specs
The USW-48 is a fanless 1U UniFi switch with 48 gigabit RJ45 ports and four 1G SFP uplinks. It has no PoE. Click any port on the panel below to see what it does, then read on for specs and LED meanings.
- 1U rack mount
- 48 x 1G RJ45
- 4 x 1G SFP
- Fanless
- 40 W max
- 8.6 lb
USW-48 specifications
| Model | USW-48 (UniFi Switch 48) |
| Form factor | 1U, full 19 in. rack width, fanless |
| Copper ports | 48 x 10/100/1000 RJ45 |
| Uplinks | 4 x 1G SFP |
| PoE | None |
| Non-blocking line rate | 52 Gbps |
| Forwarding rate | 77.376 Mpps |
| Power | Internal 60 W AC/DC supply, 100 to 240 VAC, 50/60 Hz |
| Max. power consumption | 40 W |
| Display | 1.3 in. touch screen |
| Management | Ethernet in-band, UniFi Network application |
| Dimensions (H x W x D) | 1.72 x 17.42 x 11.22 in. (43.7 x 442.4 x 285 mm) |
| Weight | 8.6 lb (3.9 kg), 8.8 lb (3.99 kg) with mount |
| Enclosure | SGCC steel |
| Operating temperature | 5 to 104 F (-15 to 40 C) |
| Humidity | 10 to 90% noncondensing |
| Certifications | CE, FCC, IC |
Every port on the front panel, explained
Click a card to light up those ports on the panel above.
48 gigabit ports48 on the panel
Four blocks of twelve. Odd numbers are on the top row and even numbers on the bottom, counting left to right.
Each runs at 10, 100 or 1000 Mbps. None of them supply PoE, so access points and cameras need a PoE switch or injectors.
4 SFP uplinks (49 to 52)4 on the panel
A 2 x 2 group at the right: 49 and 51 on top, 50 and 52 underneath. Each takes a 1G SFP module or DAC cable for fiber runs or links to a core switch.
Also on the front
- Touch display: a 1.3 in. screen on the left shows the switch state and basic diagnostics.
- Reset: the pinhole at the far right, below the SFP group.
LED and display meanings
- Boot animation on display
- Starting up
- Firmware icon on display
- Firmware upgrade in progress
- Steady white
- Factory defaults, waiting for adoption
- Steady blue
- Adopted and managed
- Port LED green
- Linked at 1G
- Port LED amber
- Linked at 10 or 100 Mbps
- SFP LED green
- Linked at 1G
An amber port usually means an old device or a poor cable. Check the run before blaming the switch.
Power and cooling
An internal 60 W supply takes 100 to 240 VAC, so one cord works anywhere. The switch draws at most 40 W and has no fans, which makes it a quiet fit for studios, offices and closets near work areas. Leave air space above and around it in the rack.
Frequently asked questions
Does the Ubiquiti USW-48 have PoE?+
No. The USW-48 is a non-PoE switch. Use a PoE model or injectors for powered devices.
How many SFP ports does the USW-48 have?+
Four 1G SFP ports, numbered 49 to 52.
Is the USW-48 fanless?+
Yes. It has no fans and draws up to 40 W.
How much does the USW-48 weigh?+
3.9 kg (8.6 lb) without the mount and 3.99 kg (8.8 lb) with it.
What does a white light on the USW-48 mean?+
Steady white means the switch is at factory defaults and waiting to be adopted. Steady blue means it is adopted.
What does an amber port light mean on a UniFi switch?+
The port linked at 10 or 100 Mbps. Green means 1G.
Plan this network switch in your rack
The USW-48 is in the Ubiquiti library for DaMatrix, with every port mapped so you can drag it into a rack, patch it and print the documentation.
Related Ubiquiti devices
- U7-Pro-Max
- Ubiquiti Aggregation (USW-Aggregation)
- Ubiquiti Dream Machine Pro (UDM-Pro)
- Ubiquiti Dream Machine Pro Max (UDM-Pro-Max)
- Ubiquiti Dream Machine Special Edition (UDM-SE)
- Ubiquiti Enterprise Firewall (EFG)
- Ubiquiti Enterprise Firewall Core (EF-Core)
- Ubiquiti Pro Max 16 (USW-Pro-Max-16)
- Ubiquiti Pro Max 24 PoE (USW-Pro-Max-24-PoE)
- Ubiquiti Pro Max 48 PoE (USW-Pro-Max-48-PoE)
- Ubiquiti Pro XG 48 PoE (USW-Pro-XG-48-PoE)
- Ubiquiti Standard 16 PoE (USW-16-PoE)
- Ubiquiti Standard 24 PoE (USW-24-PoE)
- Ubiquiti WAN Switch (USW-WAN)
Summarized from the UniFi Switch 48 (USW-48) Datasheet. This page is a quick reference; check the full manual for safety warnings and model-specific limits.