Arista Networks CAB-S-S-25G-4M Compatible 25G SFP28 Passive Copper Twinax Cable, 4m (13ft)

For data-center links that specify Arista Networks CAB-S-S-25G-4M, this 4m (13ft) DAC assembly delivers 25G connectivity through SFP28 to SFP28. It removes separate module-and-patch-cord interfaces while retaining clear mechanical, power and compatibility details for high-density design and installation planning.

OEM Part Number: CAB-S-S-25G-4MHT Part Number: CAB-S-S-25G-4M

Product Highlights

Compatible alternative to Arista Networks CAB-S-S-25G-4M
25G connectivity at 25Gbps
Interface configuration: SFP28 to SFP28
Fixed length and part number: 4m (13ft), CAB-S-S-25G-4M
Conductor specification: 26AWG
Minimum bend radius: 28mm

Specifications

HT Part Number	CAB-S-S-25G-4M
Arista Networks Compatible	CAB-S-S-25G-4M
Manufacturer	HT
Connector Type	SFP28 to SFP28
Max Data Rate	25Gbps
Minimum Bend Radius	28mm
Wire AWG	26AWG
Cable Length	4m (13.12ft)
Jacket Material	PVC (OFNR)
Typical Power Consumption	≤0.5W
Power Supply	3.3V
Temperature	0 to 70°C (32 to 158°F)
Protocols	IEEE 802.3, SFP28 MSA, SFF-8402, Infiniband, EIA 364-1000
Application	25G Ethernet, Data Center, 5G Wireless

Cable Construction and Routing

This assembly uses 26AWG conductors, PVC (OFNR) jacket, minimum bend radius 28mm. These mechanical characteristics affect how the cable should be dressed behind the equipment. Avoid sharp edges, excessive ties and repeated tight bends close to the connector boots.

Network and Protocol Considerations

The intended application is 25G Ethernet, Data Center, 5G Wireless. Listed interface and protocol references include IEEE 802.3, SFP28 MSA, SFF-8402, Infiniband, EIA 364-1000. Confirm that the host firmware and port configuration support the same operating mode.

Passive Copper Operation

A passive DAC has no separate optical conversion stage. Its low-power, low-latency operation is useful for short equipment links, but the assembly must remain within the length and signaling mode accepted by both hosts.

Length Selection and Installation Planning

The 4m (13ft) length gives CAB-S-S-25G-4M more freedom for adjacent-rack and row-end deployments. Longer copper runs need particular attention to routing weight and bend control; the DAC specification and host support must still match the intended link.

Position Within the Length Range

CAB-S-S-25G-4M occupies the middle of this family between CAB-S-S-25G-3M at 3m (10ft) and CAB-S-S-25G-5M at 5m (16ft). It adds 1m over the shorter option for extra routing clearance, while the next longer version adds another 1m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.

Data-Center Design and Airflow

Select the assembly by both reach and rack layout. A direct connection removes separate module-and-patch-cord interfaces, but it still needs a bend-safe pathway and clear connector access. Keep cable bundles from blocking front-panel airflow, account for the listed interface power where applicable and choose a length that supports maintenance without leaving an unmanaged coil. For this assembly, the listed conductor specification is 26AWG; the minimum bend radius is 28mm; the jacket material is PVC (OFNR).

Quality Assurance and Packaging

Each cable receives connector inspection and a functional link check before it is coiled with bend-safe slack and packed. Protective materials shield the connector housings during transport. Rack or project labels are available to keep length, part number and installation destination aligned. Volume orders can include customer references on the labels and carton list.

Ordering Information

Provide the OEM reference, HT part number, fixed length and quantity, together with the intended host interfaces. Rack-based quantities and packaging instructions can be included for larger deployments. Other lengths are separate products and should be entered on their own order lines. Keep CAB-S-S-25G-4M associated with 4m (13ft) throughout the order and receiving record.

Arista Networks Compatibility and Factory Testing

Compatibility confirmation combines host identification with actual link establishment and diagnostic checks. The assembly is prepared for the stated OEM reference rather than selected only by connector shape. For a new data-center deployment, the equipment model, port mode and software release provide the most useful basis for a pre-order review. Where supported by the host, link stability and diagnostic indications are reviewed together with the established link.

Frequently Asked Questions

Is this an original Arista Networks cable?

No. It is an HT-manufactured compatible alternative for equipment that specifies Arista Networks CAB-S-S-25G-4M.

Can excess cable be folded into a compact bundle?

No. Use a supported, bend-safe service loop and observe the listed minimum bend radius. Do not crease the cable or tighten ties around the connector boots.

Will any matching connector operate at the same speed?

Not necessarily. Both hosts must support the stated rate, identification, lane mapping and any required breakout configuration; mechanical compatibility alone is insufficient.

What details assist a compatibility review?

Provide the equipment manufacturer, model, port type, hardware revision and software release, together with the OEM reference, required length and quantity.

Shipping and Lead Time

Available stock is generally dispatched within one to three working days after order confirmation, with production lead times advised for larger quantities. Worldwide courier services are available, with air or sea freight for consolidated shipments; freight-collect delivery and coordination with a customer’s logistics provider can be arranged.