QSFP-DD to 4x QSFP28-400G-AOC-20M66FT 400G QSFP-DD 8 x 50G PAM4 to 4 x 100G QSFP28 4 x 25G NRZ Active Optical Breakout Cable, 20m (66ft)

This HT cable matches the QSFP-DD to 4x QSFP28-400G-AOC-20M66FT requirement for multi-vendor equipment. The 20m (66ft) assembly supports 400G operation and provides a factory-terminated active optical link with the optical engines and fiber integrated into the assembly; its complete electrical and mechanical details are listed below.

OEM Part Number: QSFP-DD to 4x QSFP28-400G-AOC-20M66FTHT Part Number: QSFP-DD to 4x QSFP28-400G-AOC-20M66FT

Product Highlights

• HT-manufactured AOC assembly in 20m (66ft)
• 400G connectivity at 400Gbps
• Interface configuration: QSFP-DD to 4x QSFP28
• Fixed length and part number: 20m (66ft), QSFP-DD to 4x QSFP28-400G-AOC-20M66FT
• Cable construction: Breakout AOC
• Maximum power consumption: 10W (QSFP-DD End)5.5W (QSFP28 Per End)
• Minimum bend radius: 30mm

The listed modulation format is QSFP-DD-8x 50G-PAM4QSFP28-4x 25G-NRZ. Both host interfaces must be configured for the same aggregate rate and lane arrangement. A connector that fits mechanically does not by itself guarantee that the remote port supports this encoding or breakout mode.

The extended 20m (66ft) reach supports connections across adjacent racks or between separated equipment rows. Secure the cable along its route, protect both ends from pull loads and preserve ventilation. The integrated AOC construction avoids a chain of separate modules and patch leads.

QSFP-DD to 4x QSFP28-400G-AOC-20M66FT is the longest of 8 verified length options in this family. Compared with QSFP-DD to 4x QSFP28-400G-AOC-15M49FT at 15m (49ft), it provides 5m 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 rated power consumption is 10W (QSFP-DD End)5.5W (QSFP28 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 OFNP jacket, minimum bend radius 30mm. 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-8661, IEEE802.3bs-400GAUI-8, IEEE802.3bm-CAUI-4, CMIS 4.0, SFF-8636. Confirm that the host firmware and port configuration support the same operating mode.

The QSFP-DD to 4x QSFP28 configuration divides the high-speed interface into multiple lower-speed connections. Verify the upstream lane assignment, downstream port speeds and breakout setting on the host before connecting the assembly. Each branch must attach to the correct remote interface.

The optical engines and fiber are permanently integrated into this AOC. There are no detachable optical modules to clean or exchange. Handle the complete assembly by its connector housings and cable, and keep both ends matched to the same interface specification.

The assembly is configured for equipment that recognizes QSFP-DD to 4x QSFP28-400G-AOC-20M66FT. Before shipment, we inspect both connectors and verify identification, link establishment and optical link operation, receive activity 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.

When ordering, specify QSFP-DD to 4x QSFP28-400G-AOC-20M66FT, cable length 20m (66ft) and the host platform. This allows our team to verify both the physical assembly and the compatibility requirement before production. Neutral labeling and customer packing lists can be arranged for volume orders.

Quality control includes connector appearance, cable identification and functional verification. Packing materials are selected to keep the connector housings and cable boots from taking impact during transport, and the coil is not compressed into an undersized bundle. Volume orders can include customer-specific labels and packing documentation.

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.