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HDMI® Voltage Inserter

#42223 C2G
HDMI® Voltage Inserter is rated 4.5 out of 5 by 4.
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$34.99 $37.99 MSRP USD

The 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 1000mA 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:
  • Connect the voltage inserter directly to the HDMI output port of the source device.
  • Connect a HDMI cable from the HDMI output of the voltage inserter to the HDMI input of the display or other HDMI device.
  • Connect the AC adapter of the voltage inserter to an available power outlet.
Connector 1:
(1) HDMI Male
Connector 2:
(1) HDMI Female
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  • Isolates power from a HDMI source device
  • Stabilizes HDMI Vbus at a proper 5 Volts and increases current capacity to 1000mA
  • Fully compliant with all UltraHD and 4K performance requirements


General Info
Product Line C2G
Color Black
UPC Number 757120422235
Country Of Origin China
Application Sector Commercial, Residential
Warranty Type 5-Year
Type Active Device, Voltage Inserter
Product Length US 6.0 FT
Cable Length 6 ft
Buy American Act Compliance
TAA Compliant Yes
Technical Information
Video Resolution 1080p, 4K, 4K 30Hz, 4K 60Hz
Cable Diameter 3.6 mm
Data Transfer Rate 18 Gbps



Rated 5 out of 5 by from Worked when almost all hope was lost. So I have a complicated HDMI setup in one of my church buildings. (wall plate -> 45 ft cable -> HDMI auto switch #40349 -> 1ft HDMI cable -> HDMI splitter -> 100ft HDMI cable to projector.) Without the voltage inserters, this projector would have never gotten off of the ground. I have placed 3 voltage inserters in this configuration. (One inside each wall plate, and one prior to going to the projector), I get CRYSTAL CLEAR picture without any problems. BTW the other leg of the splitter goes to an HDMI to SDI adapter which then goes to a computer. Love the products from C2G, high-quality stuff for not a lot of $$$. If you are running a long cable run, put one of these near the source and you will have a lot more stable of a connection.
Date published: 2015-10-09
Rated 5 out of 5 by from Works as it should We've purchased a number of these to power fiber optic HDMI cables which have an issue in longer lengths with the HDMI output of the source device not having enough current to power the transmitting circuitry. They've worked like a charm so far with not visible issues.
Date published: 2011-12-31
Rated 3 out of 5 by from Will not permit 1080p with 1080i Cable Tried to use this to fix an incompatibility issue with the Rapid Run Digital cable and a 1080i setting on a projector. In 2008, Rapid Run Digital cable was not rated for 1080i, so be sure to verify your interface before ordering. There should now be a 1080i Rapid Run offering.
Date published: 2009-05-17
Rated 5 out of 5 by from HDMI® Voltage Inserter It worked. Very simple device. Power up plug an HDMI cable in and out. Fixed the signal from my Canon XA50
Date published: 2021-10-05
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Questions & Answers

Which side of the HDMI inserter receives the 5VDC 1A output? Is it the plug (male) or socket (female) or both?

Asked by: Jay
The Female end receives the power.
Answered by: Tom
Date published: 2017-10-06

Does this work with PC monitors?

Asked by: waferlake
this will work to provide additional voltage to an HDMI cable connected to a monitor if that is what you are asking. If you are asking if it will power a monitor, it will not.
Answered by: Thomas
Date published: 2020-08-03

Can the 42236 be used to convert a standard TV HDMI input so it will work with a Roku Stick designed to work with MHL port?

Asked by: Anonymous
Unfortunately it will not work in that application.
Answered by: Sean
Date published: 2017-10-06

When using a 42223 voltage inserter with a 29374 HDMI over cat5 extender, where exactly does the voltage inserter get plugged in?

Asked by: Anonymous
The voltage inserter connects to the source to supply power to the transmitter.
Answered by: Tom
Date published: 2017-10-06
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