Generic 400G DACOSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT 400G OSFP 4 x 100G PAM4 RHS/Flat Top to 400G QSFP-DD 4 x 100G PAM4 Passive Copper Twinax Cable, 1m (3ft)
For densely populated equipment, the fixed 1m (3ft) version of Generic OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT offers a clearly defined 400G link without separate optical modules or patch cords. The DAC assembly uses OSFP (RHS/Flat Top) to QSFP-DD; its power, mechanical and diagnostic details are listed where supplied so port density and cable management can be assessed together.
OEM Part Number: OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FTHT Part Number: OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT
Product Highlights
- HT-manufactured DAC assembly in 1m (3ft)
- 400G connectivity at 400Gbps
- Interface configuration: OSFP (RHS/Flat Top) to QSFP-DD
- Fixed length and part number: 1m (3ft), OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT
- Cable construction: Passive Twinax
- Conductor specification: 30AWG
- Maximum power consumption: ≤0.1W
- Minimum bend radius: 34.5mm
Specifications
| HT Part Number | OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT |
|---|---|
| Manufacturer | HT |
| Form Factor | OSFP (RHS/Flat Top) to QSFP-DD |
| Max Data Rate | 400Gbps |
| Media | Copper |
| Cable Type | Passive Twinax |
| Cable Length | 1m (3ft) |
| Wire AWG | 30AWG |
| Minimum Bend Radius | 34.5mm |
| Power Consumption | ≤0.1W |
| Jacket Material | PVC |
| Temperature | 0 to 70°C (32 to 158°F) |
| Application | 400G Ethernet |
| Modulation Technology | OSFP-4x100GPAM4QDD-4x100GPAM4 |
| Protocols | IEEE 802.3cd, OSFP MSA, QSFP-DD MSA, CMIS Rev4.0, SFF-8417 |
Power and Thermal Planning
The rated power consumption is ≤0.1W. 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.
Network and Protocol Considerations
The intended application is 400G Ethernet. Listed interface and protocol references include IEEE 802.3cd, OSFP MSA, QSFP-DD MSA, CMIS Rev4.0, SFF-8417. Confirm that the host firmware and port configuration support the same operating mode.
Passive Copper Operation
A passive DAC has no separate optical conversion stage. Its low-power, low-latency operation is useful for short equipment links, but the assembly must remain within the length and signaling mode accepted by both hosts.
Length Selection and Installation Planning
At 1m (3ft), OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT is a practical choice for direct connections within one rack. Route the cable along the intended management path rather than pulling it diagonally across adjacent connectors, and leave enough clearance for insertion, removal and front-panel airflow.
Position Within the Length Range
OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT occupies the middle of this family between OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-0.5M2FT at 0.5m (2ft) and OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1.5M5FT at 1.5m (5ft). It adds 0.5m over the shorter option for extra routing clearance, while the next longer version adds another 0.5m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.
High-Density Rack Integration
In a densely populated rack, connector access and airflow are part of the link design. Choose the shortest length that follows the managed path comfortably, avoid tight bundles around the connector housings and preserve room for latch operation. Where power consumption is listed, include every populated interface in the host thermal budget rather than assessing a single cable in isolation. For this assembly, the listed conductor specification is 30AWG; the minimum bend radius is 34.5mm; the stated power consumption is ≤0.1W; the jacket material is PVC.
Cable Construction and Routing
This assembly uses 30AWG conductors, PVC jacket, minimum bend radius 34.5mm. 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.
Quality Assurance and Packaging
Each assembly receives a visual connector inspection and functional link check before it is coiled and protected. Packaging is selected to avoid compressing the cable into a tight bundle, and optional rack-based labels help maintain an orderly installation when many identical interfaces are populated together. Volume orders can include customer references on the labels and carton list.
Ordering Information
Provide the exact part number, length, quantity and target interface density. For multi-rack projects, list each length separately and identify any preferred carton grouping. Host model and software information can be included for a compatibility review before production or dispatch. Quantity and any labeling instructions should be attached specifically to OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT.
Generic Compatibility and Factory Testing
The assembly is evaluated for host recognition and stable link operation, with diagnostics checked where the interface provides them. This approach verifies more than electrical or optical continuity. Exact platform and firmware information remains valuable in high-density deployments because port mode and qualification policy can differ within the same connector family. Both connectors are examined before the operating test, which includes link stability and diagnostic indications.
Frequently Asked Questions
Is this an original equipment manufacturer cable?
No. It is manufactured by HT under our own manufacturer identity.
What details assist a compatibility review?
Provide the equipment manufacturer, model, port type, hardware revision and software release, together with the OEM reference, required length and quantity.
How should an unused assembly be stored?
Protect both connector ends, keep the cable in a loose bend-safe coil and retain its part-number label so the length and compatibility identity remain traceable.
Can different brands be connected with the same assembly?
Only where both hosts explicitly support the complete interface and compatibility arrangement. Document each end and select the appropriate brand-specific product when required.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production quantities confirmed at order stage. 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.
