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Green rectangular PoE HAT board with 40-pin header, compact layout, 65.00 by 32.00 mm

WaveShare

WaveShare PoE HAT E for Raspberry Pi 3B+/4B computer accessory

SKU CH-XYTW-3PJGR

Adds 802.3af Power over Ethernet to Raspberry Pi 3B+/4B with 5V 2.5A output and official-case clearance

  • CPU TypeOther
  • Powers Raspberry Pi 3B+/4B through Ethernet cable using IEEE 802.3af standard
  • Delivers stable 5 V at 2.5 A from 37–57 V PoE input
  • Fully isolated switched-mode supply protects the board from voltage spikes
  • Compact 65.00 × 32.00 mm layout fits inside the official Raspberry Pi case
  • Includes header for connecting an external cooling fan for thermal management

PoE HAT E for Raspberry Pi 3B+ and 4B

This Power over Ethernet HAT adds 802.3af-compliant PoE support to Raspberry Pi 3B+ and 4B boards. It draws 37 V to 57 V DC from the network cable and delivers a regulated 5 V at 2.5 A to the single-board computer. The fully isolated switched-mode supply fits the official Raspberry Pi case and includes a header for an optional cooling fan.

Replacing a separate PoE injector

The board removes the need for a local mains adapter and a mid-span injector by taking power directly from an 802.3af switch or injector. The upgrade is worthwhile when the Pi sits in a location without a convenient socket, such as a ceiling-mounted camera or a remote sensor node, and the existing network infrastructure already provides PoE.

Sustained operation with isolated SMPS

The isolated switched-mode design maintains a steady 5 V output during continuous load without injecting noise into the Pi’s rails. The compact 65.00 mm by 32.00 mm layout leaves room inside the official case for airflow, and the fan header allows active cooling to keep temperatures stable during long-running workloads.

Highlights

  • Powers Raspberry Pi 3B+/4B through Ethernet cable using IEEE 802.3af standard
  • Delivers stable 5 V at 2.5 A from 37–57 V PoE input
  • Fully isolated switched-mode supply protects the board from voltage spikes
  • Compact 65.00 × 32.00 mm layout fits inside the official Raspberry Pi case
  • Includes header for connecting an external cooling fan for thermal management

Specifications

CPU TypeOther

Questions about this item

What are the board dimensions so I can check clearance inside the official Raspberry Pi case?

The HAT measures 65.00 × 32.00 mm, matching the Raspberry Pi footprint and designed to fit inside the official case without interference.

Which GPIO pins must be aligned when seating the HAT on a Pi 3B+ or 4B, and what is the common mistake?

Align the 40-pin header exactly; the frequent error is offsetting by one row, which shorts the 5 V rail and prevents the PoE supply from starting.

Does the onboard fan header require a specific voltage fan, and when should the fan be replaced?

The header supplies 5 V; use a 5 V fan and replace it when bearing noise appears or airflow drops enough to let the PoE regulator throttle under load.

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