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Raspberry Pi 3B+/4B Power over Ethernet HAT (B)

Regular price $20.89

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Power Over Ethernet HAT For Raspberry Pi 3B+/4B, 802.3af-Compliant
(Any Backward-Compatible Future Versions Will Be Supported As Well)

OLED for real-time monitoring temperature, IP, and fan status 
The PoE HAT (B) is a 802.3af-compliant Power Over Ethernet accessory for the Raspberry Pi 3B+/4B. By using this small HAT and some proper 802.3af-compliant power sourcing equipments, it is possible to provide both network connection and power supply for your Raspberry Pi in only one Ethernet cable.

Features At A Glance

  • Standard Raspberry Pi 40PIN GPIO header, supports Raspberry Pi 3B+/4B
  • PoE (Power Over Ethernet) capability,802.3af-compliant
  • Fully isolated switched-mode power supply (SMPS)
  • 0.91" OLED, for monitoring processor temperature, IP address, and fan status in real-time
  • Onboard cooling fan, allows auto running on powerup OR programmable control, configured by switch
  • Integrates PCF8574 IO expander for I2C bus, providing pin P0 for directly fan control, and more spare IO pins


  • PoE Power input: 37V ~ 57V DC in
  • PoE Power output: 5V 2.5A DC out
  • Network standard: 802.3af PoE
  • Dimensions: 56.5mm x 65mm
  • OLED size: 0.91inch
  • OLED pixels: 128x32
  • OLED driver: SSD1306
  • OLED display color: White
For Use With Raspberry Pi 3B+/4B

Standard Raspberry Pi 40PIN GPIO Stackable Header, Allows Connecting Other HATs

Power Over Ethernet

Providing Both Network Connection And Power Supply For Your Raspberry Pi In One Cable

* proper 802.3af-compliant power sourcing equipment is required

0.91" OLED Display

128 × 32 Pixels, I2C-Bus Controlled
Monitoring Processor Temperature, IP Address, Fan Status In Real-Time

Cooling Fan

Allows Auto Running On Powerup OR Programmable Control, Configured By Switch
Automatically Turn On/Off Depending On The Raspberry Pi Processor Temperature

Onboard PCF8574 Chip

PCF8574 IO Expander For I2C Bus, Providing 8 IO Pins, Of Which P0 For Fan Control
And Extra Spare Pins On Solder Pads (P1-P7, INT)

Pinout Definition
Outline Dimensions