Dell ACC-Q56DD-400G-5M Compatible 400G QSFP-DD 8 x 50G PAM4 Active Copper Twinax Cable, 5m (16ft)

Use the ACC-Q56DD-400G-5M compatible assembly where a 400G connection is required between compatible ports. This page covers the 5m (16ft) version only, with its own HT part number, specifications and compatibility verification.

OEM Part Number: ACC-Q56DD-400G-5MHT Part Number: ACC-Q56DD-400G-5M

Product Highlights

• Compatible alternative to Dell ACC-Q56DD-400G-5M
• 400G connectivity at 425Gbps
• Interface configuration: QSFP-DD
• Fixed length and part number: 5m (16ft), ACC-Q56DD-400G-5M
• Cable construction: Active Twinax
• Conductor specification: 28AWG
• Maximum power consumption: 2.5W Per End
• Minimum bend radius: 80mm

The rated power consumption is 2.5W Per End. 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 28AWG conductors, PVC jacket, minimum bend radius 80mm. 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 determined by the host interface and protocol support. Listed interface and protocol references include QSFP-DD MSA, SFF-8636. Confirm that the host firmware and port configuration support the same operating mode.

The 5m (16ft) length gives ACC-Q56DD-400G-5M more freedom for adjacent-rack and row-end deployments. Longer copper runs need particular attention to routing weight and bend control; the ACC specification and host support must still match the intended link.

ACC-Q56DD-400G-5M is the longest of 2 verified length options in this family. Compared with ACC-Q56DD-400G-3M at 3m (10ft), it provides 2m of additional reach for a longer vertical drop, a wider rack or an adjacent-cabinet route. Confirm that the complete path requires this length, because unused slack still needs supported, bend-safe storage.

The assembly is configured for equipment that recognizes ACC-Q56DD-400G-5M. Before shipment, we inspect both connectors and verify identification, link establishment and electrical continuity, link stability and diagnostic readouts. Host hardware and firmware revisions can affect third-party cable acceptance, so customers can provide the equipment model and software release for a pre-order compatibility review.

This product is ordered as ACC-Q56DD-400G-5M in 5m (16ft). Include the equipment model and software release if you would like a pre-order compatibility review. Other lengths use different part numbers and should not be substituted into the same order line.

Before packing, our team checks the cable jacket, connector boots, latches and identification of each assembly. The cable is then secured in a loose coil and protected against dust and connector impact. Neutral packaging, customer part-number labels and project-specific carton lists can be supplied on request.

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.