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Ubiquiti Flex 2.5G PoE is a managed switch designed to operate under the UniFi system. It features 8× 2.5G Ethernet ports and 1× Combo port, allowing either 10G Ethernet or SFP+ connectivity. Each 2.5G port provides PoE++ output, with power output depending on the standard: 15.4W for 802.3af, 32W for 802.3at, and 64W for 802.3bt (Type 3). The 10G Ethernet port includes a PoE+++ input, supporting a maximum input power of 100W (802.3bt Type 4). The total PoE output budget across all ports depends on the switch's power source: using PoE input, it ranges from 16W to 76W, while an optional 210W AC power adapter allows for a maximum budget of 196W. A power adapter is not included in the package.
The device supports essential Layer 2 management features, including STP/RSTP, flow control, port isolation, jumbo frames, and loop protection. It comes in a compact desktop enclosure with wall-mounting accessories included. This switch is an excellent choice as an access switch for UniFi networks built on a 2.5 Gb/s infrastructure.
Switch with 8× 2.5G Ethernet Ports and 1× 10G Combo Port
The offered product is a switch equipped with 8× 2.5G Ethernet ports and 1× Combo port, allowing either 10G Ethernet or SFP+ connectivity. The optical interface enables long-distance connections, depending on the installed modules. This device is an excellent choice for networks built on a 2.5 Gb/s infrastructure.


8× PoE++ Outputs, 1× PoE+++ Input
All 2.5G Ethernet ports feature PoE++ output, supporting 802.3af, 802.3at, and 802.3bt (Type 3) standards. The maximum output power per port depends on the standard: 15.4W (802.3af), 32W (802.3at), or 64W (802.3bt Type 3).
The total PoE output budget depends on the power source. The switch can be powered via the PoE input on the 10G Ethernet port or a DC power connector. Using PoE input, the available power budget is: 16W with PoE+ (802.3at), 46W with PoE++ (802.3bt Type 3) and 76W with PoE+++ (802.3bt Type 4). When using an external 210W AC power adapter, the total PoE budget increases to 196W. The power adapter is not included in the package.
Desktop Enclosure with Wall-Mount Option, Layer 2 Management
The device features a compact desktop enclosure and includes a bracket for wall mounting. If needed, you can purchase an optional DIN rail mount or magnetic mount, available in the related products section below the description.
The Flex 2.5G PoE supports essential Layer 2 management features, including port isolation, flow control, jumbo frames, STP, and RSTP.


Application
The Flex 2.5G PoE is an excellent access switch for UniFi networks, providing a 2.5 Gb/s connection throughput—a crucial feature for modern Wi-Fi 7 access points. With its 10G interface, the switch allows for full 2.5 Gb/s bandwidth across multiple ports, ensuring high-speed connectivity and efficient network performance.
Specifications
Ubiquiti USW-Flex-2.5G-8-PoE | |
Overview | |
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Dimensions | 212.9 x 99.4 x 33.5 mm (8.4 x 3.9 x 1.3") |
Port Layout |
8x 2.5G Ethernet (PoE++ output) 1x Combo:
|
Max. PoE Output | Up to PoE++ (802.3 af / at / bt type 3) |
Total PoE Availability |
PoE+++ input: 76W PoE++ input: 46W PoE+ input: 16W 210W AC adapter input: 196W |
Form Factor | Compact Desktop, wall |
Performance | |
Switching Capacity | 60 Gb/s |
Total Non-Blocking Throughput | 30 Gb/s |
Forwarding Rate | 45 Mp/s |
Supported VLANs | 256 |
MAC Address Table Size | 4000 |
Layer 2 Features | |
STP & RSTP | Yes |
Egress Rate Limit | Yes |
Flow Control | Yes |
Storm Control | Yes |
Multicast & Broadcast Rate Limiting | Yes |
Port Isolation | Yes |
Port Mirroring | Yes |
Jumbo Frames | Yes |
Loop Protection | Yes |
Hardware | |
PoE Ports | 8x PoE++ |
Max. PoE Wattage per Port by PSE |
PoE 15,4 W PoE+ 32 W PoE++ 64 W |
Max. Power Consumption |
14W (Excluding PoE output) with PoE input 17W (Excluding PoE output) with AC adapter input 210W (Including PoE Output) |
Power Method |
(1) AC/DC adapter (Excluded) (1) PoE+++ |
Power Input Method |
DC Input PoE |
Supported Voltage Range | 50 - 57 V (DC / PoE) |
Management | Ethernet |
Weight | 567 g (20 oz) |
Enclosure Material | Polycarbonate |
Mount Material | Polycarbonate |
Ambient Operating Temperature | -20 to 45° C (-4 to 113° F) |
Ambient Operating Humidity | 10 to 90% noncondensing |
Software | |
Application Requirements | UniFi Network: Version 9.0.114 and later |