MCA4J80-N004NVIDIA/Mellanox MCA4J80-N004 Compatible 800G Twin-port OSFP 8 x 100G PAM4 IHS/Finned Top InfiniBand NDR Active Copper Twinax Cable, 4m (13ft)
This 4m (13ft) MCA4J80-N004 compatible assembly provides 800G ACC connectivity for NVIDIA/Mellanox interfaces in a OSFP (IHS/Finned Top) to OSFP (IHS/Finned Top) configuration. It is supplied as one complete cable, with specifications and installation guidance that help high-density racks balance reach, connector access and airflow while retaining the exact OEM reference required by the host.
OEM Part Number: MCA4J80-N004HT Part Number: MCA4J80-N004
Product Highlights
- Compatible alternative to NVIDIA/Mellanox MCA4J80-N004
- 800G connectivity at 850Gbps (8x 106.25Gbps)
- Interface configuration: OSFP (IHS/Finned Top) to OSFP (IHS/Finned Top)
- Fixed length and part number: 4m (13ft), MCA4J80-N004
- Cable construction: Active DAC (ACC)
- Conductor specification: 26AWG
- Maximum power consumption: 1.3W Per End
- Minimum bend radius: 59.5mm
Specifications
| HT Part Number | MCA4J80-N004 |
|---|---|
| NVIDIA/Mellanox InfiniBand Compatible | MCA4J80-N004 |
| Manufacturer | HT |
| Form Factor | OSFP (IHS/Finned Top) to OSFP (IHS/Finned Top) |
| Max. Data Rate | 850Gbps (8x 106.25Gbps) |
| Media | Copper |
| Cable Type | Active DAC (ACC) |
| Cable Length | 4m (13ft) |
| Wire AWG | 26AWG |
| Minimum Bend Radius | 59.5mm |
| Max. Power Consumption | 1.3W Per End |
| Jacket Material | PET |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Modulation Format | 8x100G-PAM4 |
| Application | 800G InfiniBand |
| Protocols | CMIS 5.0, IEEE 802.3ck, OSFP Rev5.0 |
Signal and Lane Configuration
The listed modulation format is 8x100G-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.
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 26AWG; the minimum bend radius is 59.5mm; the stated power consumption is 1.3W Per End; the jacket material is PET.
Power and Thermal Planning
The rated power consumption is 1.3W Per End. 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 26AWG conductors, PET jacket, minimum bend radius 59.5mm. 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 800G InfiniBand. Listed interface and protocol references include CMIS 5.0, IEEE 802.3ck, OSFP Rev5.0. Confirm that the host firmware and port configuration support the same operating mode.
Length Selection and Installation Planning
The 4m (13ft) length gives MCA4J80-N004 more freedom for adjacent-rack and row-end deployments. Longer copper runs need particular attention to routing weight and bend control; the ACC specification and host support must still match the intended link.
Position Within the Length Range
MCA4J80-N004 occupies the middle of this family between MCA4J80-N002 at 2m (7ft) and MCA4J80-N005 at 5m (16ft). It adds 2m over the shorter option for extra routing clearance, while the next longer version adds another 1m. Measure the managed path and choose this version when its reach is sufficient without creating the slack associated with the longer assembly.
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. Standard protective packing is used by default, with project documentation arranged when requested.
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. Keep MCA4J80-N004 associated with 4m (13ft) throughout the order and receiving record.
NVIDIA/Mellanox 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. Where supported by the host, link stability and diagnostic indications are reviewed together with the established link.
Frequently Asked Questions
Is this an original NVIDIA/Mellanox cable?
No. It is an HT-manufactured compatible alternative for equipment that specifies NVIDIA/Mellanox MCA4J80-N004.
Does this order code cover multiple lengths?
No. MCA4J80-N004 refers here to 4m (13ft). Every other verified length has a separate part number and page in the length list.
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.
Shipping and Lead Time
Available stock is normally prepared for dispatch within one to three working days, while larger production requirements are scheduled with the order. 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.
