4 Best PoE Splitters for Raspberry Pi in 2026

A PoE HAT's Isolation Rating Determines Its Safety Margin With Non-Compliant or Passive PoE Sources

The LoveRPi pick specifically states 3KV galvanic isolation designed for switches and power sourcing equipment that don't provide their own PSE-side isolation, a notably higher protection margin than a standard isolated SMPS design without a specifically stated isolation voltage. This matters significantly if you're using a passive DC 48V injector or a non-IEEE-compliant PoE source that doesn't handle isolation on its own end, and matters less if you're using a fully compliant, high-quality 802.3af/at switch with its own proper isolation. Check a PoE HAT's specifically stated isolation voltage rating if your PoE source is passive or non-standard, rather than assuming any 'isolated' claim provides equivalent protection.

A HAT's Physical Size Directly Affects Whether It Fits Inside Your Specific Raspberry Pi Case

The UCTRONICS pick specifically states a 65mm by 44mm by 13mm footprint, nearly half the size of the official Raspberry Pi PoE HAT, a real space consideration if you're using a compact case that the larger official HAT or the similarly-sized waveshare pick wouldn't fit inside without modification. This matters if you've already selected a specific compact case for your Pi project, and matters less if you're using an open frame or a case specifically designed to accommodate the official HAT's larger dimensions. Measure your specific case's internal clearance against a HAT's stated dimensions before assuming any PoE HAT fits your particular enclosure.

Additional Output Ports on a PoE HAT Can Power Accessories Beyond Just the Raspberry Pi Itself

The waveshare pick specifically includes both 5V USB-A and 12V header outputs beyond just powering the Pi, letting you connect and power an additional external device like a fan, sensor, or display from the same HAT without a separate power source. This matters if your project includes accessories that need their own power beyond what the Pi itself draws, and matters less if your setup only needs to power the bare Raspberry Pi board. Check whether a PoE HAT offers additional output ports if your specific project includes accessories requiring separate power delivery.

The Raspberry Pi Zero Series Requires a Fundamentally Different HAT Than the Pi 4B or 3B+ Due to No Native Ethernet

The Waveshare PoE Ethernet USB HUB HAT is specifically designed for the Pi Zero, Zero W, and Zero 2 W boards, which have no native Ethernet port at all, meaning this HAT must add both Ethernet connectivity and PoE power simultaneously, a fundamentally different requirement than the Pi 4B/3B+ HATs that only need to add power since those boards already have built-in Ethernet. This matters significantly since a standard Pi 4B/3B+ PoE HAT physically won't work with the Zero series' different GPIO layout and lack of Ethernet hardware. Verify your specific Raspberry Pi model (Zero series versus 4B/3B+) before purchasing a PoE HAT, since these two HAT categories are not interchangeable.

Active Cooling Fans on a PoE HAT Address Real Heat Generation That Passive Designs Require External Ventilation to Manage

The waveshare pick specifically includes an onboard active cooling fan for better heat dissipation, while the UCTRONICS pick explicitly recommends ensuring adequate air circulation since it becomes hot during normal operation without its own fan, a real difference in thermal management approach between the two HATs. This matters if you're installing the Pi in an enclosed case with limited airflow, where an onboard fan provides more reliable cooling, and matters less if your Pi sits in an open, well-ventilated location where passive cooling is adequate. Check whether a HAT includes active cooling or relies on your case providing adequate passive airflow before finalizing your case and cooling setup together.

Isolation Rating

Compared standard isolated SMPS designs against higher galvanic isolation ratings like 3KV.

Power Budget and Output Options

Compared total wattage and whether the HAT offers additional output ports beyond just powering the Pi.

Board Compatibility

Compared Pi 4B/3B+ compatibility against Pi Zero series support.

Thermal Management

Compared onboard active cooling fans against passive designs requiring external ventilation.

Cluster and Multi-Board Suitability

Compared features specifically relevant to deploying many Pi boards from one PoE switch.