Dell ACC-Q56DD-400G-3M Compatible 400G QSFP-DD 8 x 50G PAM4 Active Copper Twinax Cable, 3m (10ft)

Designed for hosts that recognize ACC-Q56DD-400G-3M, this QSFP-DD cable delivers 400G transmission over a fixed 3m (10ft) assembly. Its ACC construction provides an actively conditioned copper link for the stated high-speed interface.

OEM Part Number: ACC-Q56DD-400G-3MHT Part Number: ACC-Q56DD-400G-3M

Product Highlights

• Compatible alternative to Dell ACC-Q56DD-400G-3M
• 400G connectivity at 425Gbps
• Interface configuration: QSFP-DD
• Fixed length and part number: 3m (10ft), ACC-Q56DD-400G-3M
• Cable construction: Active Twinax
• Conductor specification: 30AWG
• Maximum power consumption: 2.5W Per End
• Minimum bend radius: 70mm

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 30AWG conductors, PVC jacket, minimum bend radius 70mm. 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.

At 3m (10ft), this assembly can bridge non-aligned ports or adjacent racks while remaining a single direct-attach link. Support longer horizontal runs with suitable cable management and preserve space for cooling and future maintenance.

ACC-Q56DD-400G-3M is the shortest of 2 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 ACC-Q56DD-400G-5M at 5m (16ft), adding 2m for a less direct routing path; selecting it unnecessarily would leave more cable to dress.

Each ACC-Q56DD-400G-3M compatible cable is powered up on a suitable test interface rather than checked only for continuity. We confirm the expected identification and observe electrical continuity, link stability and diagnostic readouts. Because operating systems can apply different qualification rules by hardware revision, the intended Dell platform should be included with the order.

Quote HT part number ACC-Q56DD-400G-3M with the required quantity. The 3m (10ft) 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 ACC-Q56DD-400G-3M compatible assembly undergoes link testing, compatibility verification and visual inspection. The 3m (10ft) 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.

Standard configurations normally ship within one to three working days. Worldwide courier, air freight and sea freight options are available, and shipments can also be sent on your own courier account or delivered to an appointed forwarder.