Arista Networks CAB-O-2Q-400G Compatible 400G OSFP 8 x 50G PAM4 IHS/Finned Top to 2 x 200G QSFP56 4 x 50G PAM4 Passive Copper Breakout Cable

Product Highlights

• HT-manufactured compatible alternative for Arista Networks CAB-O-2Q-400G
• 400G aggregate connectivity at 400Gbps
• Interface configuration: OSFP (IHS/Finned Top) to 2x QSFP56
• Passive Twinax
• Length configurations covered: 1m (3ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2m (7ft), 2.5m (8ft), 3m (10ft) and 3m (10ft)
• Conductor specification: 28AWG
• Power consumption: 0.1W (OSFP End) 0.1W (QSFP56 Per End)
• Operating temperature: 0 to 70°C (32 to 158°F)

Available Lengths and Corresponding Part Numbers

The documented configurations are 1m (3ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2m (7ft), 2.5m (8ft), 3m (10ft) and 3m (10ft). Each link below opens the separate product page for that physical length and its corresponding OEM part number. Select the exact assembly required by the route and purchase order; custom project lengths can be discussed separately.

Compatible OEM Part Numbers

• CAB-O-2Q-400G-1M
• OSFP (IHS/Finned Top) to 2x QSFP56-400G-DAC-1M3FT
• OSFP (IHS/Finned Top) to 2x QSFP56-400G-DAC-1.5M5FT
• CAB-O-2Q-400G-2M
• OSFP (IHS/Finned Top) to 2x QSFP56-400G-DAC-2M7FT
• OSFP (IHS/Finned Top) to 2x QSFP56-400G-DAC-2.5M8FT
• CAB-O-2Q-400G-3M
• OSFP (IHS/Finned Top) to 2x QSFP56-400G-DAC-3M10FT

Specifications

Applications and Deployment

A passive DAC reduces the connection to one factory-terminated electrical assembly. This is useful where low latency, low interface power and a short managed route matter more than optical reach. Cable gauge, connector construction and host port settings still influence whether the complete link operates reliably. For this series, the listed interface is OSFP (IHS/Finned Top) to 2x QSFP56 and the aggregate rate is 400G. The stated application is 400G Ethernet.

Cable Construction and Routing

The specification table records the conductor specification is 28AWG; the jacket material is PVC; the minimum bend radius is 40.5mm; the operating temperature is 0 to 70°C (32 to 158°F); the power consumption is 0.1W (OSFP End) 0.1W (QSFP56 Per End). Use those values when preparing the rack pathway and receiving checklist. Do not pull a connector by its cable, compress the run under tight ties or force excess length into a sharp coil. Connector protection should remain in place until the assembly is ready for insertion.

Procurement and Port-Mapping Review

A useful purchase order should identify the host platform, the expected OEM code and the exact cable length as separate pieces of information. This prevents a physically similar assembly from being substituted when the port identification or reach is different. For mixed-length installations, prepare one order line per part number and reconcile each delivered cable with its intended pair of ports. For this series, keep the interface rate, DAC construction and length-specific OEM reference together throughout that review.

Arista Networks Compatibility and Factory Testing

Our procurement-oriented compatibility check begins with the OEM reference and ends with a live host link. We record the physical length separately from the identification configuration, so the cable supplied for this page remains the stated version rather than a generic length substitute. Series-level inspection is followed by the exact length and OEM configuration selected for dispatch. Functional verification includes link establishment and diagnostic indications where the host exposes them.

Ordering Information

For a clear bill of materials, quote the OEM reference, HT part number, length and quantity on the same line. Add the switch or server model and software release when a pre-order review is required; project labels can repeat those details for receiving and installation teams. For this series, follow the corresponding length link, quote that exact OEM part number and keep different lengths on separate order lines. HT part number CAB-O-2Q-400G identifies the product family; the linked page provides the final length-specific identity.

Quality Assurance and Packaging

Before packing, the assembly is checked for connector condition, identification and link operation. Cables for multi-line orders can be labelled and grouped by part number, making it easier to match each length to the procurement record without opening every protective bag. Both connector ends are inspected as part of the complete assembly, and protective packing is selected to avoid tight bends during transport and storage.

Shipping and Lead Time

Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.

Frequently Asked Questions