NVIDIA MCA4J80-N005 800Gb/s Twin-Port OSFP Active Copper Cable (ACC)

High-performance 5-meter active copper cable for NDR InfiniBand and 400G Ethernet—delivering 800Gb/s aggregate bandwidth over twin-port OSFP to 2x OSFP connections with ultra-low latency and 1.5W per end power consumption.

• 800Gb/s twin-port OSFP to 2x400Gb/s OSFP (breakout) active copper cable
• Based on 8 channels of 100G-PAM4 modulation per end
• 5-meter reach using 26AWG conductors with integrated equalizer IC
• Power consumption: only 1.5W max per end | Operating case temperature 0°C to +70°C
• Hot-pluggable, RoHS compliant, LSZH jacket, SFF-8636 management interface

Characteristics

• 800Gb/s Throughput: Twin-port OSFP design supporting full NDR InfiniBand or 400G Ethernet (2x400G breakout).
• Active Copper Technology: Integrated equalizer IC extends reach to 5m while maintaining ultra-low latency and 1.5W power.
• Protocol Agnostic: Firmware auto-detects InfiniBand or Ethernet; works with Quantum-2 and Spectrum-4 switches.
• Optimized Signal Integrity: Each length tuned to reduce noise and back reflections; 26AWG for 5m variant.
• Rigorous Production Testing: Ensures out-of-box reliability and performance.

Technology & Standards

The MCA4J80-N005 is based on OSFP MSA Rev. 1.12 and uses 8 channels of 100G-PAM4 modulation. It incorporates an active equalizer IC at each end to pre-emphasize signals, enabling longer reach than passive DACs. The EEPROM provides product identification via I²C (SFF-8636). Supports both InfiniBand NDR and 400GbE with auto-protocol detection. Compliant with RoHS, LSZH, and HF (halogen-free) PCB requirements.

Working Principle: Active Copper Equalization

Unlike passive DAC cables, the MCA4J80-N005 integrates a low-power equalizer IC inside each OSFP connector. This IC compensates for high-frequency signal loss over longer copper runs. For the 5m model, thicker 26AWG wires are used to reduce resistance, and the equalizer reshapes the 100G-PAM4 eye diagram at both transmitter and receiver ends. The result is a link that behaves electrically like a much shorter cable, achieving 800Gb/s with BER well below specification while dissipating only 1.5W per end.

Applications & Deployment

• Quantum-2 Switch to Switch: Connect two 800Gb/s InfiniBand switches up to 5m apart.
• Switch to DGX H100: Ideal for linking Quantum-2 ToR switches to NVIDIA DGX H100 systems (flat/finned variants available).
• Ethernet Data Centers: Spectrum-4 400G switch interconnection or server-to-leaf.
• High-Density Racks: Short-reach intra-rack cabling with minimal latency.

Technical Specifications & Ordering Options

Note: Flat-top and flat-to-finned variants available for DGX H100 (MCA4J80-N003-FLT, MCA4J80-N003-FTF). All cables support operating temperature 0°C to +70°C, 3.3V supply, and include I²C serial interface.

Advantages & Differentiators

• vs. Passive DAC: Extends reach to 5m (passive limited to ~3m) without increasing latency or power significantly.
• vs. Active Optical (AOC): Lower cost, lower power (1.5W vs. ~3-5W), and no cleaning/maintenance of optical interfaces.
• Protocol Flexibility: Single SKU works for both InfiniBand and Ethernet; auto-detects protocol.
• Tuned Signal Integrity: Engineered for NDR’s demanding 100G-PAM4 with minimal reflections.

Service & Support

We offer 24/7 technical consultation, RMA services, and cabling infrastructure design support. Each MCA4J80-N005 is backed by a 1-year warranty and extensive pre-shipment testing. Custom lengths and labeling available for volume orders. Our inventory ensures same-day dispatch for in-stock items.

Frequently Asked Questions (FAQ)

Q: Can I use MCA4J80-N005 with 400G Ethernet switches?

A: Yes. The cable auto-detects the protocol; when connected to a Spectrum-4 400G switch, it operates as 2x400GbE breakout. For InfiniBand Quantum-2, it runs as 800Gb/s twin-port NDR.

Q: What is the difference between ACC and passive DAC?

A: ACC includes an equalizer IC inside the connector to reshape the signal, allowing longer distances (up to 5m) at 800G. Passive DAC has no active components and is limited to about 2-3m at these speeds.

Q: Does this cable require any configuration?

A: No. It is plug-and-play. The EEPROM provides identification, and the host automatically sets up the link according to the protocol.

Q: What is the minimum bend radius for installation?

A: For the 5m model (26AWG), the single bend radius is 44.5 mm (5x diameter). For repeated bending, maintain 89 mm (10x diameter). Avoid sharp bends near the connector (assembly bend radius 10x diameter).

Q: Is this cable compatible with DGX H100 systems?

A: Yes. For DGX H100, we recommend the flat-top or flat-to-finned variants (MCA4J80-N003-FLT / -FTF) which are designed for the specific chassis interface. The standard N005 works for switch-to-switch connections.

Precautions & Handling Guidelines

• ESD Sensitivity: Use grounded wrist straps when inserting into OSFP cages. Connectors are shipped with protective caps—remove only immediately before installation.
• Bend Radius: Never bend the cable tighter than 5x outer diameter (44.5mm for N005) during installation; maintain 10x for repeated flex.
• Operating Temperature: Ensure ambient temperature within 0°C–70°C. Exceeding limits may degrade equalizer performance.
• Compliance: This is a Class A device. In residential areas it may cause interference—install in shielded commercial environments.
• Storage: Store in clean, dry environment between -40°C and 85°C. Avoid crushing or heavy loads on cable.

Company Introduction

With over a decade of experience, we operate a large-scale factory backed by a strong technical team. Our extensive customer base and domain expertise enable us to offer competitive pricing without compromising on quality. As authorized distributors for Mellanox, Ruckus, Aruba, and Extreme, we stock original network switches, network card (nic card) solutions, wireless Access Points, controllers, and cabling. We maintain a 10 million USD inventory to ensure rapid fulfillment across diverse product lines. Every shipment is verified for accuracy, and we provide 24/7 consultation and technical support. Our professional sales and technical teams have earned a high reputation in global markets—partner with us for reliable infrastructure solutions.