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1m (3ft) NVIDIA (InfiniBand) Compatible 400G QSFP-DD to 4 x 100G QSFP56 Active Optical Breakout Cable
P/N: Q4Q56-400G-A
US$1839.00
10
Reviews
5
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
(1000 In Stock)

Product Highlights

Built-in Inphi Chip, COB Packaging
Low Power Consumption <3.5W (100G Per End), 12W (400G Per End)
Tested in Targeted Switches for Superior Performance, Quality, and Reliability
Increased Reliability-VCSEL, No MPO Connectors, Low BER
PAM4 Modulation, Supports 400G to 4x 100G Ethernet Interoperability
Thin and Light Weight Fiber with High Air Flow for Flexible Routing
OFNP-Rated, Hot Pluggable QSFP-DD and QSFP56 MSA Compliant
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1m (3ft) NVIDIA (InfiniBand) Compatible 400G QSFP-DD to 4 x 100G QSFP56 Active Optical Breakout Cable
The 400G QSFP-DD to 4x 100G NVIDIA (InfiniBand) QSFP56 breakout active optical cables are designed for use in 400 Gigabit Ethernet links over OM3 multimode fibers, each operating at data rates of up to 53.125Gbps per channel by PAM4 modulation. This breakout cable is compliant with IEEE 802.3cd, OIF-CEI, QSFP-DD MSA, QSFP-DD-CMIS, IEEE 802.3bs Annex120E SFF-8024, SFF-8679, SFF-8702 standards. Thin and lightweight AOC cables simplify cable management, enabling an efficient system airflow, which is critical in high-density racks. It is used extensively in cloud and supercomputers due to its low cost, high-value proposition, and increased reliability.
Specifications
Part Number
Q4Q56-400G-A
Vendor Name
AICPLIGHT
Form Factor
QSFP-DD to QSFP56
Max Data Rate
400Gbps
Media
Copper
Cable Type
OM3
Cable Length
1m (3ft)
Wire AWG
30AWG
Minimum Bend Radius
30mm
Transmitter Type
VSCEL
Receiver Type
PIN
Wavelength
850nm
Power Consumption
400G <12W; 100G<3.5W
Jacket Material
PVC (OFNR)
CDR (Clock and Data Recovery)
TX & RX Built-in CDR
Modulation Format
8x 50G-PAM4
Temperature
0 to 70°C (32 to 158°F)
DDM/DOM
Supported
Host FEC
Pre-FEC BER 2.4E-4
Protocols
IEEE 802.3cd, OIF-CEI-04.0, QSFP-DD MSA, QSFP-DD-CMIS-Rev4.0, SFF-8024, IEEE 802.3bs Annex120E
Application
400G Ethernet
Warranty
5 Years
Certification
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Questions & Answers
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All (5) Management (1)Product (1)Compatibility (1)Installation (1)Performance (1)
Q:

Do InfiniBand AOC cables support long-distance connections?

by P***m on 2025-07-10 09:44:56

A:

Yes, AOC (Active Optical Cables) support longer distances than DACs, typically up to 30 meters or more, while maintaining low latency and high bandwidth transmission.

by CPLIGHT on 2025-07-10 10:26:18

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Q:

Do these cables require special configuration after plugging in?

by c***m on 2025-07-10 09:32:58

A:

No special configuration is needed. The cables are hot-swappable and designed for plug-and-play operation in InfiniBand environments.

by CPLIGHT on 2025-07-10 10:25:43

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Q:

What is the difference between HDR and NDR InfiniBand cables?

by J***m on 2025-07-10 09:07:19

A:

HDR (High Data Rate) supports up to 200Gb/s per port, while NDR (Next Data Rate) can handle 400Gb/s. Both are used for high-performance computing, but NDR is designed for newer-generation systems requiring ultra-high bandwidth.

by Helpful on 2025-07-10 10:23:26

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Q:

Are these InfiniBand DAC/AOC cables compatible with NVIDIA/Mellanox ConnectX NICs?

by U***m on 2025-07-10 08:56:20

A:

Yes, our InfiniBand DAC and AOC cables are fully compatible with NVIDIA/Mellanox ConnectX-5, ConnectX-6, and ConnectX-7 NICs, as well as with NVIDIA Quantum and Spectrum switches.

by Helpful on 2025-07-10 10:24:04

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Q:

Can these cables be used for GPU Direct RDMA communication?

by h***m on 2025-07-10 08:55:21

A:

Absolutely. These InfiniBand cables support GPU Direct RDMA, enabling low-latency, high-throughput data transfers directly between GPUs across the fabric.

by Helpful on 2025-07-10 10:24:36

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Customer Reviews
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All (10) Performance (1)Compatibility (1)Ease of Use (1)Customer Support (1)Value (1)Reliability (1)Flexibility (1)Scalability (1)Quality (1)Delivery (1)
k
k***m
2025-07-01 14:22:24
Confirmed Purchase
5.0

We had tight routing paths between racks and these DACs were flexible enough for clean cable management without strain.

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c
c***m
2025-06-26 12:25:23
Confirmed Purchase
5.0

Order arrived earlier than expected. All cables were individually tested and labeled, saving us time during rack installation.

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G
G***m
2025-06-14 02:27:31
Confirmed Purchase
5.0

Customer service helped confirm the pinout for a custom breakout setup. Very knowledgeable and responsive team.

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l
l***m
2025-05-27 05:58:19
Confirmed Purchase
5.0

We used breakout versions (1x400G to 4x100G) to expand our interconnect fabric and they worked flawlessly.

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G
G***m
2025-05-18 17:38:47
Confirmed Purchase
5.0

Worked out of the box with ConnectX-6 NICs and Quantum switches. Auto-negotiation and link detection were flawless across all ports.

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S
S***m
2025-05-17 12:13:00
Confirmed Purchase
5.0

Cables were clearly labeled and well packaged. Plug-and-play setup made our data center upgrade smooth and fast.

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3
3***m
2025-04-28 00:48:40
Confirmed Purchase
5.0

Compared to OEM versions, these cables offer the same performance at a significantly lower cost. Great for large-scale deployment.

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s
s***m
2025-04-17 00:51:34
Confirmed Purchase
5.0

Running 24/7 in an AI training environment with zero errors so far. Excellent quality and heat management.

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t
t***m
2025-04-09 02:08:14
Confirmed Purchase
5.0

The connectors are solid, and the shielding is robust. No damage or signal degradation even after multiple insertions.

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y
y***m
2025-04-06 15:24:37
Confirmed Purchase
5.0

We used these InfiniBand HDR DAC cables to link GPU servers in our HPC cluster. The latency and bandwidth were excellent — no packet loss even under full load.

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