Arista Networks QDD-400G-4Q4xNAC Compatible 400G QSFP-DD 8 x 50G PAM4 to 4 x 100G QSFP28 4 x 25G NRZ Active Electrical Copper Breakout Cable

Product Highlights

• HT-manufactured compatible alternative for Arista Networks QDD-400G-4Q4xNAC
• 400G aggregate connectivity at 400Gbps
• AEC
• Length configurations covered: 3m (10ft)
• Conductor specification: 30AWG
• Power consumption: ≤8.5W @QSFP-DD, ≤3.5W @QSFP28
• Operating temperature: 0 to 70°C (32 to 158°F)

Available Lengths and Corresponding Part Numbers

The documented series configuration is 3m (10ft). Use the relevant OEM reference below together with the HT identity and required length when requesting a quotation. If another length carries a different OEM part number, it must be reviewed and ordered as that distinct configuration.

Compatible OEM Part Numbers

• QDD-400G-4Q4xNAC03

Specifications

Rack Layout and Service Access

Plan the managed route before removing the connector protection. The cable should reach both ports without tension while leaving enough space to release the latches and service adjacent interfaces. Support the run through the intended managers, keep the connector boots clear of sharp edges and avoid storing excess length in a tight coil behind warm exhaust air. For this series, keep the interface rate, AEC construction and length-specific OEM reference together throughout that review.

Applications and Deployment

For an AEC connection, matching the connector shape is only the first step. The host must support the electrical signaling, retiming behavior and aggregate rate of the complete assembly. Thermal planning is particularly important when many active ends populate adjacent ports. For this series, the listed interface is the stated interface and the aggregate rate is 400G.

Cable Construction and Routing

For this assembly, the conductor specification is 30AWG; the jacket material is PVC (OFNR); the minimum bend radius is 26.5mm; the operating temperature is 0 to 70°C (32 to 158°F); the power consumption is ≤8.5W @QSFP-DD, ≤3.5W @QSFP28. These parameters belong in the installation review rather than being treated as catalogue trivia. Route the cable through its intended managers without tension, avoid pressure close to the connector boots and leave enough space to operate the latches. Any service loop must respect the stated bend limit.

Quality Assurance and Packaging

The completed cable is inspected at both ends, functionally tested and coiled with bend-safe slack. Protective packaging keeps the latches and boots from taking impact, while optional project labels can identify the two endpoint locations for easier field service. Both connector ends are inspected as part of the complete assembly, and protective packing is selected to avoid tight bends during transport and storage.

Arista Networks Compatibility and Factory Testing

Compatibility is verified as part of a complete installation check: connector inspection, host identification and an operating link. The physical cable is evaluated together with the expected OEM identity, because a connector that fits is not sufficient evidence that the host will accept and operate the assembly correctly. 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

When requesting this assembly, include the exact part number and length together with the destination port types. For a rack installation, a simple port-to-port list helps us keep different lengths separate and allows any requested labels to correspond with the actual installation sequence. 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 QDD-400G-4Q4xNAC identifies the product family; the linked page provides the final length-specific identity.

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