Ubiquiti UniFi Flex 2.5G 8-Port PoE
Ubiquiti UniFi Flex 2.5G PoE – 8-Port 2.5 GbE PoE++ Switch with 10 GbE Uplink
The Ubiquiti UniFi Flex 2.5G PoE is a flexible 8-port 2.5 GbE switch designed to deliver high-speed connectivity and powerful PoE output in a compact form factor. It features eight 2.5 GbE PoE++ output ports, making it suitable for powering high-performance access points, cameras, and other PoE devices in modern multi-gig networks.
A 10 GbE RJ45/SFP+ combination uplink port provides high-bandwidth connectivity to the core network while also supporting PoE+++ input for switch power. Depending on the power source, the switch offers up to 76W of PoE with PoE+++ input, 46W with PoE++ input, and 16W with PoE+ input. When paired with the optional AC power adapter, total PoE availability increases to 196W, enabling higher overall device capacity.
Designed for deployment flexibility, the UniFi Flex 2.5G PoE can be powered via PoE+++ or an AC adapter (sold separately), making it well suited to edge installations, cabinet deployments, and space-constrained environments that require multi-gig performance and scalable PoE delivery.
Tech Specs
View the complete UniFi Flex 2.5G PoE datasheet here.
| Device Specifications | |
|---|---|
| Overview | |
| Dimensions | 212.9 x 99.4 x 33.5 mm (8.4 x 3.9 x 1.3") |
| Port Layout | 8 × 2.5 GbE RJ45 (PoE++) (2.5G/1G/100M/10M) 1 × 10 GbE RJ45 (PoE+++) (10G/5G/2.5G/1G/100M) 1 × 10G SFP+ (10G/1G) |
| Max. PoE Output | Up to PoE++ |
| Total PoE Availability | PoE+++ input: 76W PoE++ input: 46W PoE+ input: 16W 210W AC adapter input: 196W |
| Form Factor | Compact desktop, wall, DIN, magnetic |
| Performance | |
| Switching Capacity | 60 Gbps |
| Total Non-Blocking Throughput | 30 Gbps |
| Forwarding Rate | 45 Mpps |
| Supported VLANs | 256 |
| MAC Address Table | 4,000 |
| Layer 2 Features | |
| Features | STP & RSTP Egress Rate Limit Flow Control Storm Control Multicast & Broadcast Rate Limiting Port Isolation Port Mirroring Jumbo Frames Loop Protection |
| Hardware | |
| PoE Ports | 8 × PoE++ |
| Max PoE per Port | PoE: 15.4W PoE+: 32W PoE++: 64W |
| Max Power Consumption | 14W (excluding PoE output) with PoE input 17W (excluding PoE output) with AC adapter input 210W (including PoE output) |
| Power Method | AC/DC adapter (excluded) PoE+++ |
| Power Input | DC input, PoE |
| Supported Voltage Range | 50–57V DC / PoE |
| Physical & Environment | |
| Weight | 567 g (20 oz) |
| Enclosure Material | Polycarbonate |
| Mount Material | Polycarbonate |
| Operating Temperature | -20 to 45° C (-4 to 113° F) |
| Operating Humidity | 10 to 90% noncondensing |
| NDAA Compliant | Yes |
| Certifications | CE, FCC, IC |
| Software | |
| Application Requirements | UniFi Network Version 9.0.114 and later |
FAQs
Q1: What is the USW-Flex-2.5G-8-PoE and where is it used?
A: The Flex 2.5G PoE is a compact managed Layer 2 switch designed for high-performance edge deployments. It provides multi-gigabit connectivity and PoE power delivery, making it ideal for powering access points, IP cameras, and VoIP devices in offices, hospitality environments, and modern smart buildings.
Q2: What port configuration does the Flex 2.5G PoE offer?
A: The switch features eight 2.5 GbE RJ45 ports that support multi-gig speeds (100 Mb/1 Gb/2.5 Gb). It also includes a high-speed uplink port for connecting to aggregation switches or high-bandwidth network cores.
Q3: Does the switch provide Power over Ethernet (PoE)?
A: Yes. The Flex 2.5G PoE supports PoE output to power connected devices such as Wi-Fi access points, cameras, and VoIP phones. The available PoE budget depends on the power source used.
Q4: How is the switch powered?
A: The unit supports PoE input for single-cable deployment or USB-C power input for standalone operation. This flexible powering makes it suitable for installations where traditional power outlets may be limited.
Q5: How is the Flex 2.5G PoE managed and monitored?
A: The switch integrates with the UniFi Network application, allowing centralised management, traffic monitoring, VLAN configuration, and remote troubleshooting through an intuitive interface.
Resources
Flex 2.5G 8 PoE Installation Guide
Guide: Setting Up a Ubiquiti UniFi Network for a Small Office or Business — MS Dist