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Description: This is a 3 wire slip ring, a remarkably simple electromechanical assembly that allows for electronic signals and power to be passed through its rotating innards. Commonly, you’d find slip rings in wind turbines, radar antennae, or anything else that requires continuous 360° rotation while maintaining an electrical connection. This particular slip ring provides you with a compact body with precious metal alloy fiber brush to silver plated ring contacts inside. We like using these slip rings to specifically transfer power in our spinning projects because regardless of the wires position in its rotation the power remains consistent!

Each slip ring is capable of handling a continuous working speed of 250RPM, a current rating of (a whopping) 10A, and an operating voltage of 380VDC/AC. We aren’t kidding about how compact this little guy is, with only and outer diameter of 22mm for the body an 44mm diameter flange, you should have no issues fitting these into your next project. Additionally, the 250mm stranded wires protruding from each side of the slip ring have a thickness of 16AWG while the whole assembly has a water protection rating of IP51.

Note: We have used these Slip Rings at 15A with no issue.

Dimensions: 22mm Diameter x 33mm Length w/ 44mm Diameter Flange


  • 3 wires
  • Voltage: 380VDC/AC
  • Current Rating: 10A
  • Max Current Rating: 25A
  • Operating Speed: 250RPM
  • Compatible with data bus protocols
  • Transfers analog and digital signals


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Customer Comments

  • Can anyone point me to a tutorial that shows how to connect one of these slip rings with a servo motor to spin a platter containing some electronics? I’m not seeing how to connect the servo to the slip ring and how to firmly connect a spinning platter to the stub of the slip ring? Thanks!!

  • What sort of noise can be expected as the device rotates - could you run an i2c connection over this and expect clean communication?

    • The 6-wire and 12-wire units say they are good for use with digital protocols like Ethernet, CAN, etc.

  • Love the 15A rating, but would like to have two data lines…for RS-485 or other two-wire busses. Some slip rings are made with mixed gauge wires, ie. two 2A lines for data, and two 15A lines for power. Pretty please?!

    • I hear your pain, but also have a suggestion for your consideration: Use the slip rings to get power across the joint, and use some form of “wireless” for data. Although I haven’t tried it across a slip-ring, I have played with WRL-12031 units for short-range communications. (There are many other wireless options, though most of the others are more expensive.)

      • I appreciate that, but would rather group it all together and reduce the overall cost…that’s the beauty of slip rings to transmit power and communications through a joint.

        • The 6-wire and 12-wire units are rated for 2A per ring, so you could send power over multiple wire pairs. Also, the 6-wire and 12-wire units say they are good for use with digital protocols like Ethernet, CAN, etc.

Customer Reviews

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Nice way to de-couple power on a droid

Smooth and heavy gage wire. Easy to mount and effectively decouples power to a rotating member on a droid. Fast delivery from Sparkfun too.