Raspberry Pi 3b+, Gigabit PoE switch and PoE splitter: An impossible setup? Nope!
5V 1.5A Output PoE Module - Works with Raspberry Pi 3 B+ or Pi 4 : ID 3847 : $8.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Power Over Ethernet (PoE) HAT for Raspberry Pi 3 B+ 4 and 802.3af PoE
Power Over Ethernet HAT (Type B) For Raspberry Pi 3B+/4B, 802.3af Power-Sourcing Equipment Required
Raspberry Pi® Compatible 3+ micro POE Hat Industrial grade - NavoLabs
PoE HAT for Raspberry Pi 4B/3B+ - Seeed Studio | Mouser
Official Raspberry Pi PoE+ HAT / PoE HAT Powers A Raspberry Pi 4 & Pi 3 B+
UCTRONICS PoE HAT 5V 3A for Raspberry Pi 4B, 3B+ and 802.3af/at PoE Ne – Vilros.com
Amazon.com: Power Over Ethernet HAT (B) for Raspberry Pi 3 Model B+ / Raspberry Pi 4 Model B, PoE HAT Board with 0.91" OLED and Cooling Fan, Support 802.3af PoE Network Power-Sourcing
Raspberry Pi 3 B+ Adds PoE Support | Electronic Design
Power over Ethernet HAT (E) for Raspberry Pi 3B+/4B, 802.3af-compliant | PoE HAT (E)
Raspberry Pi 3B+ PoE HAT - Power Up and Suitable Adaptor - YouTube
Amazon.com: UCTRONICS PoE HAT for Raspberry Pi 4B/3B+, Power Over Ethernet ( PoE) Support 802.3af PoE Network Standard, Compatible with Pi 4B / 3B+ : Electronics
Amazon.com: Raspberry POE Expansion Board for 3B+ : Electronics
Raspberry Pi PoE HAT
PoE HAT for Raspberry Pi 4B/3B+ - RobotShop
Raspberry Pi 3 model B+ PoE HAT - YouTube
Power over Ethernet HAT (E) for Raspberry Pi 3B+/4B, 802.3af-compliant - PiShop.us
GAF-Pihat Active Power Over Ethernet (PoE) HAT for Raspberry Pi Pi3B+ – poe -world
Raspberry Pi 3 Model B+, SoC, IoT, PoE Enabled SBC AB0309 – Autobotix
Power over Ethernet HAT for Raspberry Pi 3B+/4B, 802.3af PoE network
Power over Ethernet HAT (D) for Raspberry Pi 3B+/4B, 802.3af-compliant - PiShop.us
5V 1.8A Isolated Output PoE Module - For Raspberry Pi 3 B+ or 4 : ID 3848 : $15.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Raspberry Pi POE+ HAT Power over Ethernet (POE) Expansion Board with cooling fan original product for raspberry pi 3B+ 4B - AliExpress
