The Ubiquiti Networks POE-48-24W is a passive 48V power injector used to supply power to compatible network devices over a spare pair of an Ethernet cable. It’s built for Ubiquiti and other equipment that expects passive 48V PoE, delivering up to 24 watts to the connected device. The adapter includes a Gigabit passthrough data port alongside its power output.
What is this product?
This is a passive PoE power injector that feeds 48V DC power onto an Ethernet cable’s spare pairs while passing data through separately. It sits between a router or switch and a compatible device, providing power over the same cable run as the network connection.
Key features and practical benefits
The adapter is built around simple, reliable power delivery for devices designed around 48V passive PoE.
1. Passive 48V, 24W power delivery
The adapter supplies a constant 48V DC output rated for up to 24 watts, matching the power requirements of many Ubiquiti and other networking devices that call for 48V passive PoE.
2. Gigabit data passthrough
A separate Gigabit Ethernet port allows full-speed data to pass through the adapter alongside the power injection.
3. Compact, single-device design
The small, self-contained injector is easy to tuck near a router or patch panel without requiring a dedicated PoE switch.
Common use-cases
This adapter is commonly used to power a single network device that requires passive 48V PoE, particularly when a dedicated PoE switch is not already in place. It is also used to replace a lost or damaged adapter that originally shipped with such a device.
Important specifications
Manufacturer specifications for this adapter include:
- Output: 48V DC, 24W
- Input: 100–240V AC, 50/60Hz
- Powering scheme: 2-pair passive PoE (pins 4/5, 7/8)
- Ports: Gigabit Ethernet passthrough, PoE output, AC input
- Operating temperature: 0–40°C
Practical considerations
This is passive PoE, meaning 48V is always present on the output whether or not a device is connected. It is not interchangeable with standards-based 802.3af/at PoE equipment or with lower-voltage passive adapters.
1. Not standards-based PoE
Because this is passive 48V power rather than 802.3af/at, it should not be connected to devices that expect standard PoE negotiation.
2. Voltage matters
Since some Ubiquiti devices use passive 24V rather than 48V, it’s worth confirming the exact voltage a device expects before connecting it to this adapter.
3. Always-on output
Since power is always present on the output port, connecting an incompatible device directly can cause damage.
Who is this product best suited for?
This product is best suited for:
- Owners of Ubiquiti or other networking devices needing passive 48V power.
- Anyone replacing a lost or damaged original power adapter.
- Single-device installs without an existing PoE switch.
- Users who understand and can accommodate passive PoE wiring.
It is a practical, focused solution for powering a single compatible device.
Final assessment
This adapter offers dependable passive 48V PoE power for compatible devices in a simple, single-port design. It performs well for its intended purpose, as long as buyers confirm their device supports 48V passive power before connecting it.
Ready to Buy the Ubiquiti POE-48-24W?
If you need a reliable 48V passive power source for a compatible device, this adapter is a practical option.