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USB Powered HDMI® Voltage Inserter

#42236 C2G
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$21.99 $24.99 MSRP USD

The USB Powered HDMI Voltage Inserter is the ideal solution for supporting HDMI bus-powered devices such as extenders, active cables with embedded chip sets, or signal sensing switches. HDMI was not designed to support bus-powered accessories. The power supplies associated with source devices such as computers, teleconferencing codecs, media players and set-top boxes are designed, according to HDMI standards, to deliver a 55mA hot plug supply. When an accessory demands more current than the source can supply, the system may fail to operate dependably. Insufficient power may manifest as a flashing image (HDCP problem), distorted video (EDID related issues), or even a complete loss of the image (hot plug assertion failure) Maintaining the proper voltages in the HDMI System is critical to the hardware “handshake”, HDCP key authentication and exchange, EDID information exchange and hot plug connection detect.

This voltage inserter isolates the power from the source device and provides a full 5 volts and up to 500mA of clean, dedicated power to support HDMI switching, splitting and extension accessories. If an installation leverages active cables with embedded chipsets, embedded electronic-to-optical media conversion, signal-sensing auto-switching or similar devices, then this power inserter will be a critical performance element.

Instructions for use:
Connector 1:
(1) HDMI Female, (1) USB-A Male
Connector 2:
(1) HDMI Male
Color Black


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  • Isolates power from a HDMI source device
  • Stabilizes HDMI Vbus at a proper 5 Volts and increases current capacity to 500mA
  • Fully compliant with all UltraHD and 4K performance requirements
  WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov


General Info
Product Line C2G
Color Black
UPC Number 757120422365
Country Of Origin China
Application Sector Residential, Commercial
Type Voltage Inserter
Technical Information
Wire Gauge 20 AWG
Amperage 1 A


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Questions & Answers

Can I use the USB Powered HDMI Voltage Inserter cable to plug the HDMI end into an electric outlet (using a phone charger adapter) to power a device that only has a USB port for its source of power?

Asked by: scott
The USB end can be plugged into any USB adapter for the power. The HDMI end will go on the end of your HDMI cable from source to display. It goes on the source end, and this adapter is used when the source end does not have enough voltage available to send to the display side to power on that end.
Answered by: Thomas
Date published: 2023-02-20

Does the arrow on the C2G #42236 point towards the source or towards the display??

Asked by: Stanley
The male end of the adapter goes into your source.
Answered by: Paul
Date published: 2018-08-23
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