Note: This is the latest revision of the official Power over Ethernet (PoE) HAT, the PoE+(Plus) HAT, launched on 24th May 2021.

The IEEE 802.3at Compliant, 25.5W PoE+ HAT

The enhanced version of the official Power over Ethernet (PoE) HAT for Raspberry Pi 4 Model B, Raspberry Pi 3B+, and the Compute Module 4 IO board too. It is now IEEE802.3at compliant and able to deliver up to 25.5W of power to the Raspberry Pi computer!

What is Power over Ethernet (PoE)?

PoE is to deliver power to a device through the Ethernet cable only without the need to route an additional AC line, power socket, or power adapter. PoE has been widely used for Security IP cameras, RFID readers, WiFi Access Points, Network Attached Storage, Point of Sales, etc. Now, imagine it, you can power the Raspberry Pi computer just by using a PoE compliance router, network switch, or adapter, and the Ethernet cable, super neat. As you might have known, the power pins on the RJ45 socket (Ethernet) are being extended out to header pins on Raspberry Pi 4 Model B and 3B+. But due to the board size, compatibility and cost, the PoE module is not built on the mainboard. Thus, this HAT is necessary to tab the power from the additional PoE power header pins and convert it to stable power for the Raspberry Pi.

It is a fully isolated Switched-Mode Power Supply (SMPS) that supports the PoE power input range of 37 to 57VDC and converts it into 5V, 5A to the Raspberry Pi Computer. On top of that, there is a brushless fan pointing at the processor which is controllable via I²C (40-pin GPIO). How awesome is that!

This PoE+ HAT is compatible with:

• Raspberry Pi 4 Model B 8GB
• Raspberry Pi 4 Model B 4GB
• Raspberry Pi 4 Model B 2GB
• Raspberry Pi 4 Model B 1GB (discontinued, but still compatible)
• Raspberry Pi 3 Model B+
• Compute Module 4 with the official CM4 IO Board

Features and Spec:

• Standard: IEEE 802.3at-2003 PoE
• Class 4 device
• Fully isolate Switched-Mode Power Supply (SMPS)
• Input Voltage: 37-57VDC
• Output Voltage and Current: 5VDC, 5A
• Output Power: 25.5W
• Transformer Type: Planar
• 25mm x 25mm brushless fan delivering 2.2 CFM for processor cooling
• Fan Control
• Operating Temperature: 0ºC to +50ºC
• Plug-and-play compatibility with: (latest Raspberry Pi OS)
  • Raspberry Pi 4 Model B 8GB
  • Raspberry Pi 4 Model B 4GB
  • Raspberry Pi 4 Model B 2GB
  • Raspberry Pi 4 Model B 1GB (discontinued, but still compatible)
  • Raspberry Pi 3 Model B+
  • Compute Module 4 with the official CM4 IO Board
• Dimension: Same as the earlier version of PoE HAT, 65mm x 56.5mm

• Raspberry Pi PoE+ HAT
• Mechanical spacers and bolts

You will need:

• A Raspberry Pi Mainboard, either:
  • Raspberry Pi 4 Model B 8GB
  • Raspberry Pi 4 Model B 4GB
  • Raspberry Pi 4 Model B 2GB
  • Raspberry Pi 4 Model B 1GB (discontinued, but still compatible)
  • Raspberry Pi 3 Model B+
  • Compute Module 4 with the official CM4 IO Board
• An Ethernet cable
• Power-sourcing equipment for an 802.3af or 802.3at Power over Ethernet network or PoE Injector/Adapter

Connecting your PoE+ HAT to the Raspberry Pi

• Before installing the PoE HAT, you must attach the supplied spacers in the four corners of the board
• Then connect the Raspberry Pi PoE+ HAT to the two 0.1” headers (40 + 4) that are fitted on the Raspberry Pi
• Once the PoE HAT board is connected, you can power the Raspberry Pi through its RJ45 network connector

Disconnecting your PoE HAT

• Be cautious when separating the HAT from the Raspberry Pi, especially the 2x2 female header on PoE+ HAT.
• Pull evenly so that it detaches from all the pins at the same rate; do not pull one end of the connector off before the other

• Raspberry Pi PoE+ HAT official Product page
• Raspberry Pi PoE+ HAT Product Brief
• LED on PoE+ HAT? That is a Type 2 Power Source Indicator LED. It will light up if PoE Injector > 15.4W is detected.

Additional information
No modification to the main Raspberry Pi board is needed for this product to work. Please ensure that your Raspberry Pi software is up to date for all functionality to be available. The PoE+ HAT is fitted with a small fan that is controlled by the Raspberry Pi via I²C. The fan will turn on and off automatically depending on the temperature of the main processor on the Raspberry Pi.