Power Over Ethernet (PoE) HAT with Cooling Fan for Raspberry Pi 4B/3B+

Overview The PoE HAT (C) is a Power over Ethernet expansion board designed exclusively for Raspberry Pi 3B+ and 4B. By pairing with an 802.3af/at compliant PoE switch or router, it delivers both high-speed network connectivity and stable power through a single Ethernet cable—eliminating the need for extra power adapters and drastically simplifying cabling for IoT projects, Pi clusters, and industrial deployments. Engineered for high performance and reliability, the board integrates an original MP8676 buck chip with a fully isolated Switched-Mode Power Supply (SMPS). It provides up to 4.5A total output to power the Raspberry Pi mainboard and attached peripherals, alongside dual additional power outputs (5V USB-A and 12V header) with up to 25W combined power. Note: The onboard USB-A port is dedicated strictly to power output and does not support data transmission. Key Features 🌐 Single-Cable Power & Networking IEEE 802.3af/at Compliant: Seamlessly integrates with standard PoE/PoE+ switches or routers to supply power and network data via a single RJ45 cable. High-Efficiency Power Delivery: Onboard MP8676 buck chip and fully isolated SMPS ensure clean, stable power delivery up to 4.5A for your Raspberry Pi. ⚡ Dual Peripheral Power Outputs 5V 4A USB-A Port: High-current USB power output for external devices (Power only, no data). 12V 2A 2-Pin Header: Standard 2.54mm Dupont header delivering 12V output for external fans, sensors, or display modules. 25W Max Combined Power: Generous peripheral power headroom across both 12V and 5V outputs. ❄️ Active Cooling & Expansion Ready Active Thermal Control: Built-in cooling fan with a manual Enable/Disable (EN/DIS) switch for customizable thermal management. Stackable Design: Includes a standard 40-pin pass-through GPIO header, allowing you to stack additional HATs on top effortlessly. Important Usage Notes ⚠️ IMPORTANT NOTICE: USB Port Function: The onboard USB Type-A port provides power output ONLY. It cannot be used for USB data transfer or connecting peripherals like mice or flash drives. Power Source: Requires an IEEE 802.3af/at compliant PoE switch or injector for operation. Technical Specifications Feature Specification Compatibility Raspberry Pi 3B+ / 4B PoE Input Voltage 37V ~ 57V DC Network Standard IEEE 802.3af/at PoE / PoE+ compliant Mainboard Power Output Up to 4.5A total (Mainboard + USB-A) via MP8676 buck chip USB Output 5V 4A MAX (USB Type-A, Power Only) Pin Header Output 12V 2A MAX (2.54mm Dupont 2-pin header) Max Peripheral Output Power 25W MAX (12V pin header + 5V USB-A combined) Cooling System Active fan with onboard EN/DIS control switch Dimensions 56.5 × 65 mm Packing List 1 x PoE HAT (C) 4 x Brass Stand-offs 4 x Mounting Screws 4 x Nuts Note: Raspberry Pi mainboard and PoE switch are not included in the package.