Arista Networks CAB-Q-Q-0.5M Compatible 40G QSFP+ Passive Copper Cable, 0.5m (2ft)

Use the CAB-Q-Q-0.5M compatible assembly where a 40G connection is required between compatible ports. This page covers the 0.5m (2ft) version only, with its own HT part number, specifications and compatibility verification.

OEM Part Number: CAB-Q-Q-0.5MHT Part Number: CAB-Q-Q-0.5M

Product Highlights

• Compatible alternative to Arista Networks CAB-Q-Q-0.5M
• 40G connectivity at 40Gbps
• Interface configuration: QSFP+ to QSFP+
• Fixed length and part number: 0.5m (2ft), CAB-Q-Q-0.5M
• Conductor specification: 30AWG
• Minimum bend radius: 35mm

This assembly uses 30AWG conductors, PVC (OFNR) jacket, minimum bend radius 35mm. 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 0.5m (2ft) length is suited to closely aligned ports where excessive slack would obstruct airflow or complicate dressing. Measure the actual port-to-port path before choosing CAB-Q-Q-0.5M; even a short assembly must retain the specified bend radius and should never be pulled tight behind the equipment.

CAB-Q-Q-0.5M is the shortest of 7 verified length options in this family. It is the preferred choice when the port positions are close and cable slack must be kept to a minimum. The next option is CAB-Q-Q-1M at 1m (3ft), adding 0.5m for a less direct routing path; selecting it unnecessarily would leave more cable to dress.

The intended application is determined by the host interface and protocol support. Listed interface and protocol references include SFF-8436, QSFP+ MSA and IEEE 802.3ba. 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.

Compatibility is more than matching the QSFP+ to QSFP+ shape. This assembly is prepared for hosts expecting CAB-Q-Q-0.5M and is checked for identification, stable link behavior and electrical continuity, link stability and diagnostic readouts. We recommend confirming the equipment model and software release for critical deployments or mixed-vendor installations.

Quote HT part number CAB-Q-Q-0.5M with the required quantity. The 0.5m (2ft) 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.

HT inspects and tests every completed cable before it enters finished stock. Protective caps or covers are fitted where applicable, followed by anti-static or tray packaging and an outer carton. Custom labels can cross-reference the customer part number, CAB-Q-Q-0.5M and the 0.5m (2ft) length for easier inventory control.

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.