NSComm 400G QSFP-DD to 4 x 100G QSFP56 Active Direct Attach Copper Breakout Cable up to 5m(16ft)
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400G QSFP-DD to 4 x 100G QSFP56 Active Direct Attach Copper Breakout Cable (ACC/DAC), Active Twinax
Overview
The NSComm 400G QSFP-DD to 4 x 100G QSFP56 Active Direct Attach Copper (ACC/DAC) Breakout Cable is a high-density, cost-effective way to split one 400G QSFP-DD port into four 100G links for short-reach connectivity. With integrated active twinax copper and factory-terminated connectors, it simplifies deployment and reduces the need for separate optics and fiber patching in rack environments.
Designed to support stable 400G-to-4100G interoperability, this breakout cable uses a retimed 400GAUI-8 electrical interface (850G PAM4) to deliver consistent signaling in dense fabrics. It maintains structured cabling with a 70mm minimum bend radius and supports hot-pluggable operation within the QSFP-DD ecosystem. Compliant with QSFP-DD MSA, SFF-8636, and SFF-8679, it's well-suited for modern 100G server access and phased 400G upgrades.
Compatibility Options (Coding)
NSComm provides multi-vendor coding options (selectable on the product page) to match your switch, router, NIC, server, or storage platform across major ecosystems.
Not sure which coding you need? Contact our certified engineers and we'll help confirm the right option for your exact model.
Use Scenarios / Applications
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ToR port breakout to 100G servers: convert a 400G QSFP-DD port into four 100G QSFP56 links for server/NIC connectivity in the same rack.
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Leaf access fanout: use one 400G port to feed multiple 100G downlinks for rack pods and edge rows.
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Phased upgrade paths: deploy 400G switches now while keeping 100G endpoints during staged expansion.
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High-density switch fabrics: short-reach 400G breakout cabling for compact data center fabrics where fast changes and clean cabling matter.
Key Specifications
| Specification | Details |
|---|---|
| Vendor Name | NSComm |
| Product Type | 400G QSFP-DD to 4100G QSFP56 Active Direct Attach Copper (ACC/DAC) Breakout Cable |
| Form Factor | QSFP-DD to 4QSFP56 |
| Max Data Rate | 400Gbps (4 x 100Gbps) |
| Cable Type | Active Twinax |
| Electrical Interface | 400G AUI-8 (8 x 50G PAM4, retimed) |
| Modulation | PAM4 |
| Minimum Bend Radius | 70mm |
| Jacket Material | PVC |
| Operating Temperature | 0 to 70C |
| Standards / Compliance | QSFP-DD MSA, SFF-8636, SFF-8679 |
| Inbuilt FEC | No |
| Warranty | 5 Years |
Why Choose NSComm 400G to 4 x 100G Breakout ACC/DAC?
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One 400G port, four 100G links: maximize port utilization and simplify rack wiring.
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Cost-effective: lowers optics + fiber patching cost for short reach.
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High-density ready: ideal for modern 400G switches feeding 100G endpoints.
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Stable signaling: retimed 400G AUI-8 PAM4 electrical interface.
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Plug-and-play: integrated connectors speed up installs and maintenance.
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Engineer-backed support: coding selection and topology guidance available on request.
Options
Available lengths: 3m, 4m, 5m
Coding options: selectable for different vendors (choose the matching option on the product page)
More Details
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