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Description: This barrel jack plug is great for adding a common connector to the end of our wires. This jack is compatible with 5mm barrel jacks that have a 2.1mm center pole diameter. The outer shell unscrews to reveal solder terminals and a crimp strain relief. The outer shell has strain relief as well.

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Comments 16 comments

  • How many amps can this handle? I would like one that has some headroom on the specs, and my current projects call for 3A at 14V and 1.5A at 22V. I’m blinking LEDs bright enough to embroider by.

    (And why is the only documentation link a video? This fine morning there’s no datasheet link, and I’m at a computer without flash so I can’t watch the video. )

  • When will you be coming out with a female version of this?

  • How do we know which wire (positive or negative) we’re supposed to hook up to each lead on this?

    • For the Arduino Uno it is center-positive (barrel/sleeve-negative). I suspect it depends on what your application is. Use a multimeter to be sure.

      • is center-positive the most common? Also, which lead on the jack corresponds to center or barrel?

        • Center positive and barrel negative is for electrical shielding of the signal also any fraying in the wiring would be automatically grounded instead of open able to shock unlucky people.

        • Yes, center-positive is most common.

  • How does the outer shell strain relief work? Does the mesh strain relief heat shrink or something?

    • It does not shrink, you just slide your cable through it. It’s there to increase the radius of the bend at the tail end of the plug, and thus reduce failure by repeated kinking in the same spot.

  • What’s up with the quarter in the fourth picture?

    • thats one smoking hot quarter, isnt it?

    • Shiny, isn’t it?

      It’s basically a rough indication of size to those familiar with the size of a quarter (which would be practically all of the U.S. customers).

      There’s usually also an image with actual rulers along the sides, but that one seems missing from this set :)

      • Yeah, I know, but it looks like the quarter’s contrast is waaaaaaay off. That’s what I was saying.


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