CAB-S-S-25G-3M: Arista 25G SFP28 Direct Attach Copper Cable 3m
Also listed as: CAB-S-S-25G-3M-AR
The Arista CAB-S-S-25G-3M is a 3-meter passive SFP28 twinax direct attach copper cable for 25GbE server and storage interconnections.
Specifications
| Part number | CAB-S-S-25G-3M |
|---|---|
| Brand | Arista |
| Type | Cables |
| Other numbers | CAB-S-S-25G-3M-AR |
| Status | current |
| Form factor | SFP28 to SFP28 |
| Speed | 25GbE |
| Length m | 3 |
| Cable type | Passive Copper Twinax |
| Wire gauge | 28 AWG |
About the CAB-S-S-25G-3M
The Arista CAB-S-S-25G-3M is a 3-meter passive SFP28-to-SFP28 direct attach twinax copper cable assembly for 25 Gigabit Ethernet rack interconnections. It provides high electrical signal integrity, low insertion loss, and zero added power consumption. It is commonly deployed to link top-of-rack Arista switches to enterprise server network cards within the same or adjacent rack cabinets.
Compatibility
Compatible with Arista 7050X3 series SFP28 ports and standard PCIe 25GbE server network interface cards. It operates with low latency, making it well-suited for distributed file systems, high-frequency trading networks, and hyperconverged cluster communications.
How to identify a genuine unit
Constructed with a heavy-duty twinax copper conductor assembly, molded strain relief boots, and zinc die-cast SFP28 connector heads. The cable flag label displays part number CAB-S-S-25G-3M, serial number, and length. Both ends contain pre-programmed EEPROM chips verified by Arista EOS.
Buying used
Check the cable outer jacket for excessive pinching, sharp bending, or physical cuts that could impair high-frequency 25Gbps signal quality. Verify that the pull-release rings on both connector ends release cleanly and that the metal shielding latches firmly into switch ports without play.
Fits these models
Check compatibility with Arista
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Arista has tested with the Arista CAB-S-S-25G-3M.
- Compatibility Arista transceivers and cables
- Support Arista Support
FAQ
What is the maximum operating distance?
This cable is 3 meters long, ideal for same-rack or adjacent-rack server connections.
Is configuration required on Arista EOS?
No, Arista EOS auto-detects the passive copper cable and sets port speed to 25Gbps.
Buying or selling CAB-S-S-25G-3M?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Arista Transceivers and Cables Data Sheet, checked 2026-10-27