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Description: RJ45 connectors are the kind that are used for Ethernet jacks, but they make great general purpose connectors when you need a lot of conductors. This is a small PCB that brings out the pins of the RJ45 connector to an in-line 0.1" footprint. Use with break-away headers for breadboarding or create your own RJ45 cable. Check the related items for Ethernet cable and connectors to go with it!

We used these connectors extensively in the Sound Squid demo!

Note: This is the PCB only - You can get the RJ45 connector in the related items below!

Dimensions: 0.7x0.8"


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Customer Comments

  • These are a really nice way to break out an RJ45 plug to 0.1" headers. Our FIRST Robotics team replaced most of our servo PWM cables with Cat 5 using these.
    Only comment: It would be nice it the board had two more holes in it so you could easily fasten it down to another surface.

  • FWIW, these breakout boards work perfectly with these very cost-effective RJ45 jacks from Jameco:

  • As noted by others, the pin numbers are backwards if you assume that pin 1 is the square pin. This is related to the RJ45 jack that is used. If you use the SparkFun PRT-00643 which has the locking tab at the bottom, the pins will be reversed (the square pin is pin 8). If you use a jack with the locking tab at the top the pin numbers will be correct.

  • Will this Molex Jumber 2 Wire assembly fit with an rj-45 on this board? PRT-09918

  • Works fine except the pin 1 designation (the square-shaped pad) is wrong, as noted by another commenter. The pins are in reverse: i.e. the pin 1 designation is actually designating pin 8.

  • Anyone know the maximum continuous current that the traces on this board can handle? In other words, are the traces >= 24 gauge wire?

  • It seems that the “Pin 1” indication (square pad) on this breakout is wrong, at least with the connector that you provide. I almost fried something in a PoE-setup :)

  • So how have people attached these to their projects?

  • What is pin 1?

  • Very nice! Easy assembly. Comes in handy for working with RJ45 for non Ethernet uses.

  • Very handy! I have older versions of these that work great.

  • This works great with both the Sparkfun MagJack and Pulse Magnetics J00-00XXNL parts.
    Wish that board included the LED pins, with grounds routed together and 0805 resistor footprints on the board. That would make this a plug-in solution, as it stands I have to route this stuff myself. Kinda a hassle.

  • I use them (with the RJ45 8-Pin Connector) more and more to connect two bread boards over some distance and it works great. I just wished there would be mounting holes, because the cable can pull quite a bit…

  • breakboarding?

Customer Reviews

5 out of 5

Based on 4 ratings:

5 star
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1 star

1 of 1 found this helpful:

Works exactly as expected

Uses minimal space, much easier to use than the previous version. Not much more to be said.

1 of 1 found this helpful:

The Perfect Solution

The RJ45 Breakout Board allowed me to easily add a RJ45 Socket to my prototype.

1 of 1 found this helpful:

Works with RJ11 jack, with a bit of drilling

I needed a RJ11 breakout, but could not find one. This board, with a bit of minor hole enlarging, will work with the RJ11 6-Pin Connector - PRT-00132

Exactly what we were after.

Just what we needed and well made … that about sums it up.