200G QSFP56 to 2x100G QSFP56 Passive Breakout DAC Cable — Pre-Tested for Mellanox / NVIDIA
The MCP7H50-H002R26 is a 200G QSFP56 to 2x100G QSFP56 passive breakout DAC cable engineered for high-density spine-leaf networks, AI/HPC clusters, and hyperscale data centers. At 2 meters, it gives you the extra reach for cross-rack and mid-rack connections without stepping up to active optics. Every unit is pre-programmed with EEPROM compatibility data and validated before shipment — so it works the moment you plug it in.
Will This Cable Work With My Switch?
This cable is pre-coded for seamless plug-and-play recognition on:
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NVIDIA Quantum HDR InfiniBand switches (e.g., QM8700 / QM8790) on the 200G end
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ConnectX-6 HDR100 adapters (or HDR100 split ports) on the two 100G ends
- Running Ethernet instead? A 200GbE Spectrum port split to 2x100GbE uses the MCP7H50-V family — ask us
Not sure about your exact switch model? Contact us before you buy — we'll confirm compatibility for free.
1M vs 2M — Which Length Do You Need?
| Use Case |
1M Cable |
2M Cable (This) |
| Intra-rack (same rack unit) |
✅ Ideal |
Usable |
| Top-of-rack to adjacent device |
May be tight |
✅ Ideal |
| Cross-rack / mid-rack runs |
Too short |
✅ Ideal |
| Cable management flexibility |
Minimal slack |
✅ Better slack |
Rule of thumb: if you're unsure, go 2M — you can always route extra cable, but you can't stretch a short one.
DAC vs AOC vs Transceivers — Which Should You Use?
| Feature |
DAC (This Cable) |
AOC |
Transceivers |
| Cost |
✅ Lowest |
Medium |
Highest |
| Latency |
✅ Ultra-low (passive) |
Low |
Higher |
| Power Draw |
✅ 0W (passive) |
Medium |
High |
| Best Distance |
Up to 2 meters |
Up to 100m |
Long-range |
Best for: top-of-rack, cross-rack, and mid-rack breakout connections where cost, latency, and power efficiency matter.
Ideal Use Cases
- GPU cluster interconnects for AI training and inference workloads
- High-throughput storage networking (NVMe over Fabric, RDMA)
- Spine-to-leaf breakout in hyperscale and enterprise data centers
- HDR InfiniBand environments requiring 200Gb/s port splitting
- Cross-rack deployments where 1M falls short
Common Mistakes This Cable Prevents
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Buying 1M when you need reach — measure your run before ordering; 2M covers most rack-to-rack scenarios
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Overspending on optics when passive DAC is sufficient for 2-meter runs
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Compatibility failures from OEM-locked or uncoded cables
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Latency overhead introduced by active components in short-distance links
Technical Specifications
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Part Number: MCP7H50-H002R26
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Data Rate: 200Gb/s (2x100Gb/s breakout)
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Connector Type: QSFP56 to 2x QSFP56
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Cable Length: 2 Meters
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Cable Type: Passive Direct Attach Copper (DAC)
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Wire Gauge: 26AWG Twinax
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Power Consumption: Passive (0W)
-
Operating Temperature: 0°C to 70°C
-
Standards: QSFP56 MSA compliant
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Protocol Support: HDR InfiniBand (HDR to 2x HDR100)
The Resilient Tec Guarantee
- ✅ Pre-programmed EEPROM — recognized immediately by compatible switches
- ✅ Compatibility-tested before every shipment
- ✅ Lifetime warranty on all cables
- ✅ Talk to a real engineer — not a chatbot
We don't just ship cables. We make sure they work in your environment.
Related Products
- 200G QSFP56 to 2x100G QSFP56 DAC Cable — 1M (MCP7H50-H001R30)
- 200G QSFP56 DAC Cables (other lengths)
- 100G QSFP28 Breakout DAC Cables
- 200G QSFP56 Active Optical Cables (AOC) for longer runs
📋 COMPATIBILITY DOCUMENTATION
Download the comprehensive compatibility report: MCP7H50-H002R26_Compatibility_Report
This detailed guide includes:
• Pre-tested compatibility matrix for Mellanox/NVIDIA platforms
• Switch compatibility specifications for Spectrum series
• EEPROM data and recognition protocols
• Cross-rack installation guidelines
• Extended reach deployment instructions
📋 View the full NVIDIA & Mellanox Interconnect Compatibility Guide for the complete tested model catalog.
MCP7H50 Cross-Reference: HDR vs Ethernet, and Which Length
Short answer: MCP7H50-H002R26 is a 2m passive splitter. One end is a 200Gb/s HDR QSFP56 plug for the switch, and the other end is two 100Gb/s HDR100 QSFP56 plugs, typically into two ConnectX-6 HDR100 adapters. The "H" means InfiniBand. For a 200GbE Ethernet switch port split to 2×100GbE, the matching NVIDIA family is MCP7H50-VxxxRyy.
| Part number |
Length / gauge |
At Resilient Tec |
| MCP7H50-H001R30 |
1m · 30AWG |
In stock |
| MCP7H50-H01AR30 |
1.5m · 30AWG |
Ask us |
| MCP7H50-H002R26 |
2m · 26AWG (thicker, longest passive length NVIDIA offers) |
This listing |
Need more than 2m? Passive HDR splitters stop at 2m. Beyond that, use an active optical splitter or separate optics. Contact us and we'll spec it.
Related: MFS1S00-H005E 200G HDR AOC · MMA1T00-HS HDR SR4 optic · HDR InfiniBand Deployment Guide
