OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FT 400G OSFP 4 x 100G PAM4 RHS/Flat Top Passive Copper Twinax Cable, 1m (3ft)
The assembly listed here is the 1m (3ft) member of the OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FT product family for Generic equipment. It provides 400G DAC connectivity through OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top). 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: OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FTHT Part Number: OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FT
Product Highlights
- HT-manufactured DAC assembly in 1m (3ft)
- 400G connectivity at 400Gbps
- Interface configuration: OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)
- Fixed length and part number: 1m (3ft), OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FT
- Cable construction: Passive Twinax
- Conductor specification: 28AWG
- Maximum power consumption: 0.1W
- Minimum bend radius: 40.5mm
Specifications
| HT Part Number | OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-1M3FT |
|---|---|
| Manufacturer | HT |
| Form Factor | OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top) |
| Max Data Rate | 400Gbps |
| Media | Copper |
| Cable Type | Passive Twinax |
| Cable Length | 1m (3ft) |
| Wire AWG | 28AWG |
| Minimum Bend Radius | 40.5mm |
| Max. Power Consumption | 0.1W |
| Jacket Material | PVC (OFNR) |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | OSFP MSA, CMIS Rev4.0, IEEE 802.3cd |
| Modulation Format | 4x 100G-PAM4 |
Signal and Lane Configuration
The listed modulation format is 4x 100G-PAM4. 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.
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 OSFP (RHS/Flat Top)-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 OSFP (RHS/Flat Top)-400G-DAC-1M3FT occupies the middle of this family between OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-400G-DAC-0.5M2FT at 0.5m (2ft) and OSFP (RHS/Flat Top) to OSFP (RHS/Flat Top)-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.
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 listed conductor specification is 28AWG; the minimum bend radius is 40.5mm; the stated power consumption is 0.1W; the jacket material is PVC (OFNR).
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.
Cable Construction and Routing
This assembly uses 28AWG conductors, PVC (OFNR) jacket, minimum bend radius 40.5mm. 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 determined by the host interface and protocol support. Listed interface and protocol references include OSFP MSA, CMIS Rev4.0, IEEE 802.3cd. Confirm that the host firmware and port configuration support the same operating mode.
Generic 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. Where supported by the host, link stability and diagnostic indications are reviewed together with the established link.
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.
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. This page’s fixed configuration is 1m (3ft); another length must be quoted under its corresponding part number.
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.
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.
