Dell DAC-Q28-4SFP28-25G Compatible 100G QSFP28 4 x 25G NRZ to 4 x 25G SFP28 NRZ Passive Copper Breakout Cable
A 100G direct-attached link depends on the correct host identity, interface mode and physical length. This page covers the Dell DAC-Q28-4SFP28-25G compatible DAC series in QSFP28 to SFP28, including 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft), 3m (10ft), 3.5m (11ft) and 5m (16ft). Each documented length-specific OEM reference is linked separately where an individual product page is available.
Series Part Number: DAC-Q28-4SFP28-25GHT Part Number: DAC-Q28-4SFP28-25G
Product Highlights
- HT-manufactured compatible alternative for Dell DAC-Q28-4SFP28-25G
- 100G aggregate connectivity at 100Gbps
- Interface configuration: QSFP28 to SFP28
- Passive Twinax / Copper
- Length configurations covered: 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft), 3m (10ft), 3.5m (11ft) and 5m (16ft)
- Conductor specification: 30AWG
- Power consumption: ≤0.125W
- Operating temperature: 0 to 70°C (32 to 158°F)
Available Lengths and Corresponding Part Numbers
The documented configurations are 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft), 3m (10ft), 3.5m (11ft) and 5m (16ft). Each link below opens the separate product page for that physical length and its corresponding OEM part number. Select the exact assembly required by the route and purchase order; custom project lengths can be discussed separately.
Compatible OEM Part Numbers
- DAC-Q28-4SFP28-25G-0.5M
- DAC-Q28-4SFP28-25G-1M
- DAC-Q28-4SFP28-25G-1.5M
- DAC-Q28-4SFP28-25G-2M
- DAC-Q28-4SFP28-25G-2.5M
- DAC-Q28-4SFP28-25G-3M
- DAC-Q28-4SFP28-25G-3.5M
- DAC-Q28-4SFP28-25G-5M
Specifications
| Dell (DE) Compatible | DAC-Q28-4SFP28-25G-0.5M |
|---|---|
| Manufacturer | HT |
| HT Part Number | DAC-Q28-4SFP28-25G |
| Form Factor | QSFP28 to SFP28 |
| Max Data Rate | 100Gbps |
| Cable Type | Passive Twinax |
| Cable Length Options Covered | 0.5m (2ft), 1m (3ft), 1.5m (5ft), 2m (7ft), 2.5m (8ft), 3m (10ft), 3.5m (11ft) and 5m (16ft) |
| Wire AWG | 30AWG |
| Minimum Bend Radius | 60mm |
| Power Consumption | ≤0.125W |
| Power Supply | 3.3V |
| MTBF | =50 Million Hours |
| Jacket Material | PVC (OFNR) |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation Format | QSFP28-4x 25G-NRZ SFP28-1x 25G-NRZ |
| Media | Copper |
| Application | 100G to 4x 25G Ethernet, Data Centers |
| Protocols | IEEE 802.3, QSFP28 MSA, SFF-8665 |
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 series, keep the interface rate, DAC construction and length-specific OEM reference together throughout that review.
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. 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.
Applications and Deployment
A passive DAC reduces the connection to one factory-terminated electrical assembly. This is useful where low latency, low interface power and a short managed route matter more than optical reach. Cable gauge, connector construction and host port settings still influence whether the complete link operates reliably. For this series, the listed interface is QSFP28 to SFP28 and the aggregate rate is 100G. The stated application is 100G to 4x 25G Ethernet, Data Centers.
Cable Construction and Routing
The specification table records the conductor specification is 30AWG; the jacket material is PVC (OFNR); the minimum bend radius is 60mm; the operating temperature is 0 to 70°C (32 to 158°F); the power consumption is ≤0.125W. Use those values when preparing the rack pathway and receiving checklist. Do not pull a connector by its cable, compress the run under tight ties or force excess length into a sharp coil. Connector protection should remain in place until the assembly is ready for insertion.
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. 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 DAC-Q28-4SFP28-25G 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.
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. Both connector ends are inspected as part of the complete assembly, and protective packing is selected to avoid tight bends during transport and storage.
Frequently Asked Questions
Is this an original Dell cable?
No. It is an HT-manufactured compatible cable for equipment that specifies DAC-Q28-4SFP28-25G, not an original Dell-branded product.
Are different lengths and OEM part numbers separate products?
Yes. Where a length has its own OEM reference, follow the corresponding link above and order that exact part number on its own line. Do not substitute another length only because the connector arrangement is the same.
