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Green rectangular circuit board with black GPIO header and silver Ethernet port, compact HAT form factor

SMUGDESK

SMUGDESK POE HAT (C) Power Over Ethernet Module for Raspberry Pi 4B 3B+

SKU CH-T745-BWRB9

Adds Power over Ethernet to Raspberry Pi 4B or 3B+, delivering 5V for the board and 12V for peripherals from a single cable

  • Simplifies wiring with single-cable power and data via IEEE 802.3af/at POE
  • Dual 5V and 12V outputs power Raspberry Pi and external peripherals simultaneously
  • Compact stacked HAT fits GPIO header without extra desktop space
  • Built-in overvoltage, overcurrent and short-circuit protection safeguards the Pi board
  • Complies with IEEE 802.3af 15.4W and 802.3at 30W standards for wide POE switch compatibility

Targeted Pi Models

The SMUGDESK POE HAT (C) is a Power over Ethernet expansion board designed exclusively for Raspberry Pi 4 Model B and Raspberry Pi 3 Model B+. It transmits both network data and DC power through a single Ethernet cable to simplify wiring in fixed installations such as monitoring gateways or IoT nodes.

IEEE 802.3af/at Compliance

The module strictly follows IEEE 802.3af (15.4W) and IEEE 802.3at (30W) standards for seamless operation with mainstream POE switches and injectors. This compliance is the single specification that determines whether your existing network infrastructure can power the board without additional hardware.

Dual 5V and 12V Outputs

After conversion, the HAT provides a stable 5V supply for the Raspberry Pi motherboard and an independent 12V port for external peripherals. The 12V output enables you to drive fans, relay modules, cameras, LED strips or sensors directly from the board, expanding project load capacity without extra adapters.

Highlights

  • Simplifies wiring with single-cable power and data via IEEE 802.3af/at POE
  • Dual 5V and 12V outputs power Raspberry Pi and external peripherals simultaneously
  • Compact stacked HAT fits GPIO header without extra desktop space
  • Built-in overvoltage, overcurrent and short-circuit protection safeguards the Pi board
  • Complies with IEEE 802.3af 15.4W and 802.3at 30W standards for wide POE switch compatibility

Specifications

No published specifications for this item yet.

Questions about this item

How much power can the 5 V rail deliver to a Raspberry Pi 4B or 3B+ when the HAT is fed from a standard PoE switch?

The module complies with IEEE 802.3af (15.4 W) and 802.3at (30 W) so the 5 V output stays within the switch class you connect; a 15.4 W injector covers typical Pi loads while a 30 W injector adds headroom for the 12 V rail.

Which PoE standards does the HAT support and what practical limit do they set on total draw?

It follows IEEE 802.3af at 15.4 W and IEEE 802.3at at 30 W; the connected injector or switch port decides which class is negotiated and therefore the maximum combined 5 V and 12 V power available.

Does the board need any extra mounting hardware or clearance beyond the GPIO header on a Pi 4B or 3B+?

The compact stacked HAT sits directly on the GPIO header with no additional brackets or standoffs required, leaving the rest of the board surface free for cases or DIN-rail adapters.

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