Dell AOC-Q28DD-8S28-25G-25M Compatible 200G QSFP-DD 8 x 25G NRZ to 8 x 25G SFP28 25G NRZ Active Optical Breakout Cable, 25m (82ft)
The assembly listed here is the 25m (82ft) member of the AOC-Q28DD-8S28-25G-25M product family for Dell equipment. It provides 200G AOC connectivity through QSFP-DD to 8x 25G SFP28. Project teams can use the detailed table, related references and documentation-oriented packing information to keep each delivered cable aligned with its planned endpoints.
OEM Part Number: AOC-Q28DD-8S28-25G-25MHT Part Number: AOC-Q28DD-8S28-25G-25M
Product Highlights
- Compatible alternative to Dell AOC-Q28DD-8S28-25G-25M
- 200G connectivity at 206.24Gbps (8x 25.78Gbps)
- Interface configuration: QSFP-DD to 8x 25G SFP28
- Fixed length and part number: 25m (82ft), AOC-Q28DD-8S28-25G-25M
- Cable construction: OM3
- Maximum power consumption: QSFP-DD <4W,SFP28 <1W
- Minimum bend radius: 30mm
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| HT Part Number | AOC-Q28DD-8S28-25G-25M |
|---|---|
| Dell Compatible | AOC-Q28DD-8S28-25G-25M |
| Manufacturer | HT |
| Form Factor | QSFP-DD to 8x 25G SFP28 |
| Max. Data Rate | 206.24Gbps (8x 25.78Gbps) |
| Cable Length | 25m |
| Cable Type | OM3 |
| Minimum Bend Radius | 30mm |
| Power Consumption | QSFP-DD <4W,SFP28 <1W |
| Transmitter Type | VSCEL |
| Receiver Type | PIN |
| Modulation Format | NRZ |
| BER | 5E-5 |
| Inbuilt FEC | No |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | QSFP-DD MSA V5.0,SFP28 MSA,CMIS V4.0,SFF-8472 |
Signal and Lane Configuration
The listed modulation format is 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.
Power and Thermal Planning
The rated power consumption is QSFP-DD <4W,SFP28 <1W. 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.
Cable Construction and Routing
This assembly uses 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.
Network and Protocol Considerations
The intended application is determined by the host interface and protocol support. Listed interface and protocol references include QSFP-DD MSA V5.0,SFP28 MSA,CMIS V4.0,SFF-8472. Confirm that the host firmware and port configuration support the same operating mode.
Breakout Port Mapping
The QSFP-DD to 8x 25G SFP28 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.
Integrated Optical Assembly
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.
Length Selection and Installation Planning
Longer assemblies require disciplined cable dressing. For AOC-Q28DD-8S28-25G-25M at 25m (82ft), use the intended managers rather than a diagonal route across the rack, and leave enough space to release each connector. Any service allowance should be loose and supported, with the integrated optical cable and both optical engines protected throughout the path. Within this family, AOC-Q28DD-8S28-25G-20M is shorter at 20m (66ft), while AOC-Q28DD-8S28-25G-30M is the next longer choice at 30m (98ft); comparing those two boundaries helps avoid both tension and unnecessary slack.
Position Within the Length Range
AOC-Q28DD-8S28-25G-25M occupies the middle of this family between AOC-Q28DD-8S28-25G-20M at 20m (66ft) and AOC-Q28DD-8S28-25G-30M at 30m (98ft). It adds 5m over the shorter option for extra routing clearance, while the next longer version adds another 5m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.
Project Documentation and Cable Identification
Large deployments are easier to audit when the order code, physical length and endpoint record agree. Keep the OEM reference in the compatibility document and use the HT part number on the packing list. Where several lengths arrive together, labels and carton groups can be arranged by rack or port plan so installers do not have to identify cables by appearance alone. For this assembly, the minimum bend radius is 30mm; the stated power consumption is QSFP-DD <4W,SFP28 <1W.
Dell Compatibility and Factory Testing
Factory verification links the compatibility identity to the exact physical assembly described on this page. Identification, connector condition and live link behavior are checked before packing. Customers can submit equipment and firmware details with the project documentation for a more specific pre-order compatibility review. The check includes receive activity and diagnostic indications, followed by a final inspection of both ends.
Frequently Asked Questions
Is this an original Dell cable?
No. It is an HT-manufactured compatible alternative for equipment that specifies Dell AOC-Q28DD-8S28-25G-25M.
Are separate transceivers or patch leads required?
No. This is one complete direct-attach assembly. The ends are not detachable modules and should not be separated from the cable.
Can excess cable be folded into a compact bundle?
No. Use a supported, bend-safe service loop and observe the listed minimum bend radius. Do not crease the cable or tighten ties around the connector boots.
Will any matching connector operate at the same speed?
Not necessarily. Both hosts must support the stated rate, identification, lane mapping and any required breakout configuration; mechanical compatibility alone is insufficient.
Ordering Information
Use the listed HT part number for ordering and retain the OEM reference as the host-compatibility cross-reference. Send quantities by length, along with any rack-based packing or label instructions. If the project has mixed equipment, include the host model for each group rather than relying only on the aggregate cable rate. Keep AOC-Q28DD-8S28-25G-25M associated with 25m (82ft) throughout the order and receiving record.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, while production quantities are confirmed with the order. International express, air cargo and sea freight can be selected according to destination and carton volume; customer courier accounts and nominated forwarders are also accepted.
Quality Assurance and Packaging
Inspection and link testing are completed before the cable enters its protective packaging. Project orders can be packed and labelled by length, rack or customer reference, with packing documentation that makes received quantities straightforward to reconcile against the installation schedule. Neutral packaging and customer-specific packing documentation are available on request.
