Ethernet slip rings
Moog SRA-73798 / SRA-73805 ethernet slip ring
Compact 0.61 inch Ethernet capsule with 12 contacts and gigabit or 100BaseT data.
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Need Moog parts, a replacement or another suitable option? Send your part number or describe what the machine needs to do. We connect your requirement with experienced UK engineering and procurement support to help you get the right products, pricing and supply options. Your matched provider can take the enquiry through quotation and ordering to delivery and after-sales support.
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Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Circuits (max) | 12 |
|---|---|
| Current per circuit (max) | 2 A |
| Voltage (max) | 210 V |
| Speed (max) | 250 rpm |
| Outer diameter | 15.5–15.5 mm |
| Data / bus | 1000BaseT, 100BaseT |
Summarised in our own words from Moog Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Dimensions converted from published inches.
Specify Motion is not affiliated with Moog Inc.. Moog and SRA-73798 / SRA-73805 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Moog SRA-73798 / SRA-73805 replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Moog part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Slip rings with dedicated 100M or Gigabit Ethernet channels alongside power and signal circuits, offered in solid-shaft and through-bore forms.
| Published maximum | SRA-73798 / SRA-73805 | Ethernet Slip Ring |
|---|---|---|
| Circuits | 12 | 100 meets or exceeds |
| Current per circuit | 2 A | 30 A meets or exceeds |
| Speed | 250 rpm | 300 rpm meets or exceeds |
| Voltage | 210 V | 240 V meets or exceeds |
| Bore | — | 100 mm |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Moog SRA-73798 / SRA-73805 model codes
Published model codes in the SRA-73798 / SRA-73805 range. Search this page for your part number, or send it to us for availability or an equivalent.
| Model code | Pricing / replacement |
|---|---|
| SRA-73798 | Quote or replacement for SRA-73798 → |
| SRA-73805 | Quote or replacement for SRA-73805 → |
Typical applications
What an ethernet slip ring is
An Ethernet slip ring is a rotary joint designed to pass industrial Ethernet, such as 100 Mbit/s or gigabit links, through continuous rotation without unacceptable packet loss. The data rings are laid out as matched pairs with controlled impedance, short stubs and screening from power rings, and the brushes are chosen for low, stable contact resistance. Some units use contactless capacitive, inductive or optical channels for the highest rates. Most combine the Ethernet channels with power and discrete signal rings in one housing.
When engineers choose an ethernet slip ring
Choose an Ethernet slip ring when the rotating part carries cameras, drives, remote I/O or sensors on a network, which cuts the ring count compared with hard-wiring every signal. It suits indexing machines, packaging turrets and gimbals running EtherCAT, PROFINET or EtherNet/IP. The trade-offs are cost and validation: contact rings add small resistance changes, and gigabit links are more sensitive than 100 Mbit/s. For very high data rates, long life or high speed, a fibre optic or contactless channel may be better.
How to specify the Moog SRA-73798 / SRA-73805
Send these with your enquiry and an engineer can confirm the right SRA-73798 / SRA-73805 variant or an equivalent:
- Protocol and data rate, such as EtherCAT, PROFINET or gigabit Ethernet
- Number of Ethernet channels and pairs per channel
- Required test standard or bit error rate target
- Power circuits and current per circuit (A)
- Speed (rpm) and expected life (revolutions)
- Cable type and connectors on each side, such as RJ45 or M12
- Cable lengths to the nearest switch or node (m)
Common mistakes to avoid
- Specifying gigabit when the network only needs 100 Mbit/s, which adds cost and complexity
- Ignoring the cable runs on each side, which count towards the total channel length and loss
- Routing motor power next to data rings without screening or separation
- Not testing the full link with the real protocol under rotation before production
Moog SRA-73798 / SRA-73805: frequently asked questions
Can you help replace Moog SRA-73798 / SRA-73805 or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Moog SRA-73798 / SRA-73805?
Compact 0.61 inch Ethernet capsule with 12 contacts and gigabit or 100BaseT data. Published series figures include circuits 12, current per circuit 2 A, voltage 210 V, speed 250 rpm. It is made by Moog Inc.; Specify Motion can help source it or propose an equivalent.
What model codes are in the Moog SRA-73798 / SRA-73805 range?
The SRA-73798 / SRA-73805 range includes SRA-73798, SRA-73805. The table on this page lists each published model code with its key figures. Send us the code you use, or the one you need to replace, and our engineers will confirm availability, lead time or the closest equivalent.
Who makes the Moog SRA-73798 / SRA-73805?
The Moog SRA-73798 / SRA-73805 is made by Moog (Moog Inc.) and is listed here for engineers comparing options. Specify Motion is not affiliated with Moog Inc.; brand names are used only to identify the product.
What is the circuits of the Moog SRA-73798 / SRA-73805?
The published series maximum circuits is 12. Individual models and sizes in the SRA-73798 / SRA-73805 range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Moog SRA-73798 / SRA-73805?
We can assess suitable replacement options. On published figures, Motion Control Products Ethernet Slip Ring is options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
Can EtherCAT and PROFINET run through a slip ring?
Yes, when the slip ring is designed for it. Real-time protocols are sensitive to link drops, so the data rings need controlled impedance, good screening and stable contact resistance. Tell the supplier the protocol, cycle time and number of nodes on the rotating side, and test the full network under rotation. Many suppliers validate their Ethernet rings against standard cabling test methods.
What is the difference between a contact and a contactless Ethernet slip ring?
A contact slip ring passes the signal through brushes on rings, which is economical and handles 100 Mbit/s and often gigabit links well. A contactless channel uses capacitive, inductive or optical coupling, so there is no wear on the data path and very high rates or speeds are possible. Contactless channels cost more and usually still need contact rings for power.
Further reading: Ethernet through slip rings · How to select a slip ring · Slip rings
Other ethernet slip rings series
Engineer support
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