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Power over HDBaseT (PoH) carries DC power alongside data over a single HDBaseT category cable. The HDBaseT Alliance describes it as based on IEEE 802.3at, with modifications that allow up to 100 W across four cable pairs and distances up to 100 m. That 100 W figure is a source-side headline rating, not a promise that a device at the far end receives 100 W.
How Power over HDBaseT works
HDBaseT carries signals such as audio and video over category cable. PoH adds DC power to that link, so compatible equipment can send power and data over one cable rather than requiring a separate power connection. The Alliance describes PoH as supporting up to 100 W over all four pairs at distances up to 100 m. HDBaseT Alliance: Introduction to Power over HDBaseT
PoH is a feature of an HDBaseT link, not a guarantee that any Ethernet cable, injector, switch, or powered device will work together. Endpoint support and the required power-delivery behavior matter.
What power reaches the remote device?
Power ratings depend on where they are measured. In a 2020 comparison, Microchip lists these figures for HDBaseT Type 3:
#1 Best Overall
- 4K@120Hz HDMI Extender over CAT5e/6/7 – HDBaseT Technology | Transmit uncompressed 4K Ultra HD video up to 400 feet with zero latency over a single Ethernet cable | Delivers lossless, lag-free performance ideal for gaming, home theater, and professional AV setups | Bi-directional IR pass-through allows remote control from either source or display location.
- Advanced HDMI 2.1 Support – Up to 8K Resolution | Supports HDMI 2.1, HDCP 2.3 with resolutions up to 8K@30Hz, 4K@120Hz, 4K@60Hz (UHD), and 2K@60Hz with full YUV 4:4:4 color | Compatible with HDR, HDR10+, Dolby Vision, HLG, VRR, FVA, and ALLM for ultra-smooth and vibrant visuals | Delivers 40 Gbps FRL & 18 Gbps TMDS bandwidth for uncompressed high-speed transmission | Passes DTS-HD, Dolby TrueHD, 7.1-channel digital audio, and all HDMI-standard audio formats | CEC and PoC (Power over Cable) supported for simplified setup and control.
- 8K & 4K Long-Range Transmission with PoC | Extend 8K@30Hz signals up to 300 feet and 4K@120Hz up to 400 feet over a single CAT cable | RS-232 port for command and control integration with professional AV systems | Power over Cable (PoC) enables operation with just one power adapter at either the transmitter or receiver—no need for dual power sources.
- OREI HDBaseT models are designed to work only with their own matching transmitter and receiver. They are not interchangeable with other OREI HDBaseT models, nor compatible with HDBaseT devices from other brands, due to chipset differences. For best results, always use the included or recommended pair from the same model.
- Complete OREI Professional Solution | Backed by full OREI support and a 1-Year Warranty for peace of mind | Package includes: 1x HDMI Transmitter, 1x HDMI Receiver, 1x Power Adapter (PoC-enabled), 1x Bi-directional IR Kit, 1x Set of Mounting Ears, and a User Manual for easy setup and installation.
| Configuration or measurement point | Power figure |
|---|---|
| Two-pair PoH Type 3, PSE output | 47.5 W |
| Four-pair PoH Type 3, PSE output | 95 W |
| Four-pair HDBaseT Type 3, powered-device input after a 100 m cable | 72.4 W guaranteed |
These are the values in Microchip’s application-note comparison, not a universal measurement of every PoH installation. The PSE output is the power sent from the supplying equipment; the powered-device input is what remains available at the receiving end after cable losses. The Alliance’s “up to 100 W” description should therefore not be read as 100 W guaranteed at a remote device. Microchip, Designing a PoE PD Using PD702x0 and PD701x0 (2020)
Why PoH needs compatible equipment
PoH has specific classification behavior. Microchip’s application note says PoH Type 3 classification is mandatory; the powered device recognizes three-event classification and an HDBaseT flag. This is why a generic Power over Ethernet (PoE) injector or switch should not be assumed to substitute for PoH equipment: the available documentation describes PoH-specific signaling, not universal cross-compatibility.
Rank #2
- 1080p HDMI Extender Balun: The OREI EX-500IR is a professional 1080p HDMI over ethernet solution that sends Full HD 1080p@60 Hz video and audio signals up to 500 feet through one CAT 5e/6/7 cable without signal loss or bulky long hdmi cable; Supports HDBaseT Technology for lossless and lag-free long distance video transmission
- Crystal Clear Full HD Video: This hdmi to ethernet adapter supports HDMI & HDCP 1.4 compliant, HDR, and 8-bit color for sharp visuals and smooth playback; HDMI loop out allows local screen viewing while extending to a remote display; Supports LPCM 7.1CH, Dolby Digital, DTS 5.1, Dolby True HD, Dolby Atmos for immersive sound performance
- Easy Remote Control: The HDMI balun supports two-way IR pass-through, enabling control of streaming devices from either the transmitter or receiver side. It also features RS-232 command control and Power over Cable, requiring only a single power adapter connected to either unit to power both the transmitter and receiver
- Wide Device Compatibility: Works with TVs, monitors, projectors, gaming consoles, Blu-ray players, laptops, and AV receivers; It’s perfect for professional business use, home theaters, digital signage, and conference rooms that need reliable hdmi over cat6 connectivity
- What You Get: HDMI transmitter and receiver, IR TX/RX cables, power adapter, mounting kit and user manual; Backed by 12-month warranty and OREI tech support; OREI HDBaseT Extenders models only work with their matching transmitter and receiver. They are not interchangeable with other OREI or third-party HDBaseT devices due to chipset differences
When comparing equipment, check that the supplying and powered endpoints explicitly support PoH, that their classification requirements match, and that the power available at the device input meets its stated need. PoH’s supported current also affects cabling: Microchip says PoH follows IEEE 802.3at Type 2 cable types, while its higher supported current limits how many cables can be placed in a bundle.
Choosing cable for a PoH installation
Cable must support both power carriage and HDBaseT signal performance over the planned route. The Alliance and UL announced a cable-certification program in 2017 intended to evaluate both. The announcement described evaluation under the then soon-to-be-published UL 4299 Outline of Investigation, with inspections and ongoing testing as part of cable surveillance. It is historical context, not confirmation of the current status of UL 4299 or proof that a particular cable listing is certified. HDBaseT Alliance and UL cable-certification announcement (February 7, 2017)
- Check the exact transmitter, receiver, source, or sink documentation for PoH support and power requirements.
- Confirm the route length and the power expected at the receiving device, allowing for the difference between source output and powered-device input.
- Select cable suitable for the installation’s power and HDBaseT data requirements; verify specific certification claims against current documentation rather than relying on a generic cable description.
- Consult the HDBaseT Alliance’s product catalogue and the equipment makers’ documentation when validating product compatibility. HDBaseT Alliance
PoH in one sentence
Power over HDBaseT is a way for compatible HDBaseT equipment to deliver DC power and data over one category cable; its usable remote power depends on the configuration, cable run, and endpoint requirements.
Quick Recap
Best Value
- Important Noted: The package is ONLY inlcuded a HDBT Transmitter which use in combination with MT-VIKI Modular Matrix Switcher HDBaseT Cards, not included a Receiver, If you need, pls search ASIN:B0FMY5FQNB
- This HDMI HDBT Transmitter can Extend 1080P up to 230 feet (70 meters) or 4K@60Hz (4:2:0) up to 130 feet (40 meters) over Cat5e/6 UTP cable. Support 1080P 3D. The video is transmitted using uncompressed HDT technology.
- BI-DIRECTIONAL IR: Extends IR signal from source to receiver or from transmitter to receiver.
- POWER OVER CABLE: Only the transmitter needs power adapter, the receiver power via ethernet. 【If use it in combination with MT-VIKI Modular Matrix Switcher POE HDBaseT Cards, then neither TX nor RX needs to be connected to the power supply.】
- Package: 1x HDMI HDBT Transmitter, 1 x IR Tx Cables, 1 x IR Rx Cables 1 x Power Adapter, 1 x Mount Kits, 1x Phoenix terminal, 1 X User Manual
Rank #4
- Extend HDMI Up to 4K@60Hz HDR or Non-HDR: Transmit video signals up to 230 feet (70 meters) over a single Cat6/Cat7 Ethernet cable. The device comes with a dual-voltage power supply using a US plug, plus an adapter/converter for international use.
- Full HDMI & Audio Support: HDMI 2.0, HDCP 2.2/1.4, and DVI 1.0 compliant. Supports resolutions up to 4K@60Hz RGB/YCbCr 4:4:4, YCbCr 4:2:2, 2K@60Hz. Audio formats include LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, and DSD.
- Power Over Cable (POC): Only the receiver unit requires connection to power; the transmitter receives power automatically through the Ethernet cable. Reduces cable clutter and simplifies installation.
- Two-Way IR & RS-232 Control: Enables full remote control of your source devices from the display location, perfect for home theater, conference rooms, classrooms, churches, or trade show setups.
- Model Compatibility Notice: OREI HDBaseT kits work only with their matching transmitter and receiver. Not compatible with other OREI HDBaseT models or third-party HDBaseT devices due to chipset differences. Always use the included or recommended pair for best performance.
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