Arista Networks CAB-Q-Q-100G-2.5M Compatible 100G QSFP28 4 x 25G NRZ Passive Copper Twinax Cable, 2.5m (8ft)

The CAB-Q-Q-100G-2.5M cable offers a direct QSFP28 to QSFP28 connection at 100Gbps. Its 2.5m (8ft) length and DAC construction are intended for Arista Networks equipment, with no separate transceiver-and-patch-cord assembly required.

OEM Part Number: CAB-Q-Q-100G-2.5MHT Part Number: CAB-Q-Q-100G-2.5M

Product Highlights

• Compatible alternative to Arista Networks CAB-Q-Q-100G-2.5M
• 100G connectivity at 100Gbps
• Interface configuration: QSFP28 to QSFP28
• Fixed length and part number: 2.5m (8ft), CAB-Q-Q-100G-2.5M
• Cable construction: Passive Twinax
• Conductor specification: 30AWG
• Maximum power consumption: ≤0.5W
• Minimum bend radius: 33.5mm

The listed modulation format is 4x 25G-NRZ to 4x 25G-NRZ. Both host interfaces must be configured for the same aggregate rate and lane arrangement. A connector that fits mechanically does not by itself guarantee that the remote port supports this encoding or breakout mode.

The rated power consumption is ≤0.5W. Include this load in the host-port power and thermal budget, especially in densely populated switches. Maintain front-panel clearance and do not bundle the cable so tightly that it obstructs airflow around the connectors.

This assembly uses 30AWG conductors, PVC (OFNR) jacket, minimum bend radius 33.5mm. 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.

The intended application is 100G Ethernet. Listed interface and protocol references include QSFP28 MSA, SFF-8662, IEEE 802.3. Confirm that the host firmware and port configuration support the same operating mode.

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.

The 2.5m (8ft) version is useful when a two-metre run would leave insufficient working slack. Before installation, check the complete horizontal and vertical path so that CAB-Q-Q-100G-2.5M reaches both ports without tension at either connector.

CAB-Q-Q-100G-2.5M occupies the middle of this family between CAB-Q-Q-100G-2M at 2m (7ft) and CAB-Q-Q-100G-3M at 3m (10ft). It adds 0.5m over the shorter option for extra routing clearance, while the next longer version adds another 0.5m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.

The HT cable carries the compatibility configuration associated with CAB-Q-Q-100G-2.5M, while its mechanical assembly remains the fixed 2.5m (8ft) version described here. Incoming inspection, connector examination and a live link test are completed before packing. Customers with unusually old or new Arista Networks software can request a pre-order check.

Quote HT part number CAB-Q-Q-100G-2.5M with the required quantity. The 2.5m (8ft) length is fixed for this part number; if a different length is needed, select its corresponding page and OEM reference from the length list above. Standard HT labels and project-specific packaging are available.

Every CAB-Q-Q-100G-2.5M compatible assembly undergoes link testing, compatibility verification and visual inspection. The 2.5m (8ft) cable is coiled without exceeding its minimum bend radius, fitted with connector protection and packed in an anti-static bag or protective tray before cartoning. Project labels and packing lists are available for volume orders.

Stock items are generally dispatched within one to three working days after order confirmation. DHL, UPS, FedEx, TNT and EMS are available for international delivery; larger consolidated orders can move by air or sea freight. Customer courier accounts and nominated forwarders are accepted.