OSFP (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 buyers working from an equipment parts list, OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT identifies more than a connector style. It refers here to a 1m (3ft) DAC cable for Generic hosts, supporting 400G operation with OSFP (RHS/Flat Top) to QSFP-DD. The sections below separate the OEM cross-reference, physical specification and HT factory checks for straightforward purchasing review.
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.
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.
Procurement and Port-Mapping Review
A useful purchase order should identify the host platform, the expected OEM code and the exact cable length as separate pieces of information. This prevents a physically similar assembly from being substituted when the port identification or reach is different. For mixed-length installations, prepare one order line per part number and reconcile each delivered cable with its intended pair of ports. 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.
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.
Generic Compatibility and Factory Testing
Our procurement-oriented compatibility check begins with the OEM reference and ends with a live host link. We record the physical length separately from the identification configuration, so the cable supplied for this page remains the stated version rather than a generic length substitute. The check includes link stability and diagnostic indications, followed by a final inspection of both ends.
Ordering Information
For a clear bill of materials, quote the OEM reference, HT part number, length and quantity on the same line. Add the switch or server model and software release when a pre-order review is required; project labels can repeat those details for receiving and installation teams. Keep OSFP (RHS/Flat Top) to QSFP-DD-400G-DAC-1M3FT associated with 1m (3ft) throughout the order and receiving record.
Quality Assurance and Packaging
Before packing, the assembly is checked for connector condition, identification and link operation. Cables for multi-line orders can be labelled and grouped by part number, making it easier to match each length to the procurement record without opening every protective bag. Neutral packaging and customer-specific packing documentation are available on request.
Frequently Asked Questions
Is this an original equipment manufacturer cable?
No. It is manufactured by HT under our own manufacturer identity.
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.
Shipping and Lead Time
Available stock is generally dispatched within one to three working days after order confirmation, with production lead times advised for larger quantities. Delivery can be arranged by courier, air freight or sea freight, and goods may instead be handed to an appointed forwarder or shipped on the customer’s courier account.