logo
Solutions
GPU Repair
GPU Cloud Rental
Resources
About Us
Contact Us
FREE SHIPPING on Orders Over US$99
Free Quotation

English English

By clicking the "Submit", you agree that your information is collected and used for the purpose of responding to your inquiry in accordance with the Privacy Policy and Terms of Use
Submit
1m(3ft) Arista CAB-D-2Q-400G-1M Compatible 400G QSFP-DD to 2x 200G QSFP56 Ethernet Passive Direct Attach Copper Breakout Cable
1m(3ft) Arista CAB-D-2Q-400G-1M Compatible 400G QSFP-DD to 2x 200G QSFP56 Ethernet Passive Direct Attach Copper Breakout Cable
1m(3ft) Arista CAB-D-2Q-400G-1M Compatible 400G QSFP-DD to 2x 200G QSFP56 Ethernet Passive Direct Attach Copper Breakout Cable
P/N: Q400-2Q200-C1
$109.00
4
Solds
5
Reviews
5
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
（1 In Stock）

Product Highlights

Max. Power Consumption 0.1W Per End, and Has Near Zero-latency Delays
Tested in Targeted Switches for Superior Performance, Quality, and Reliability
Simplifies Patching and Offers a Cost-effective Way for Short Links
Supports 400G to 2x 200G Ethernet Interoperability
Hot Pluggable QSFP-DD and QSFP56 MSA Compliant
Minimum Bend Radius 33.5mm for Flexible Routing
8x50G PAM4 Retimed 400GAUI-8 Electrical Interface
Low Insertion Loss and Ultra-low Crosstalk for Improved Performance
See more
Specifications
Certification
Connectivity Solutions
Comparison Table
Q&A
Reviews
Resources
1m(3ft) Arista CAB-D-2Q-400G-1M Compatible 400G QSFP-DD to 2x 200G QSFP56 Ethernet Passive Direct Attach Copper Breakout Cable
The 400G QSFP-DD to 2x 200G QSFP56 cable assembly is designed to meet the high density requirements of standard and combo connector configurations. QSFP-DD pluggable solutions enable 400G transmission. It is fully compliant with SFF-8679, QSFP-DD MSA, IEEE802.3bj, and IEEE802.3cd standards. QSFP-DD to 2x QSFP56 cable assemblies are high performance, high bandwidth and cost effective interconnect solutions that support 400G standard applications with different data rates. AICPLIGHT currently offers 400G QSFP-DD to 2x 200G QSFP56 DAC in lengths of 0.5, 1, 1.5, 2, 2.5, and 3 meters, ideal for SDN, ML, and Cloud Computing.
Specifications
Connector Type
QSFP-DD to 2x QSFP56
Data Rate
425Gbps to 2x 212.5Gbps
Media
Copper
Cable Type
DAC
Cable Length
1m~3m(3ft~10ft)
Outer Diameter
1m@AWG 30 1.5~3m@AWG 28
Jacket Material
PVC
Minimum Bend Radius
23mm@AWG 30 25mm@AWG 28
Power Consumption
≤0.1W
Case Operating Temperature
0 to 70°C (32 to 158°F)
Protocol
2x 200G Breakout Ethernet 2x 200G RoCE
Application
Swicth to Switch Switch to NIC Other Links
Certification
Product
Product
Product
Product
Product
Product
Product
Product
Product
Product
Connectivity Solutions
Arista Switch links：400G QSFP-DD to 2x200 QSFP56（2）
Arista Switch links：400G QSFP-DD to 2x200 QSFP56（1）
All
Arista Switch links：400G QSFP-DD to 2x200 QSFP56（2）
Comparison Table
Cisco Compatible 400G QSFP-DD Passive DAC, 1m(3ft)
QDD-QDD-C1
Cisco Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Breakout DAC, 1m(3ft)
Q400-2Q200-C1
Cisco Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive DAC, 1m(3ft)
O400-QDD-C1
Cisco Compatible 400G OSFP Finned Top to 2 x 200G QSFP56 Breakout DAC, 1m(3ft)
O400-2Q200-C1
Connector Type QSFP-DD to QSFP-DDQSFP-DD to 2x QSFP56OSFP(Flat Top) to QSFP-DDOSFP(Finned Top) to 2x QSFP56
Data Rate 425Gbps to 425Gbps425Gbps to 2x 212.5Gbps425Gbps to 425Gbps425Gbps to 2x 212.5Gbps
Media CopperCopperCopperCopper
Cable Type DACDACDACDAC
Cable Length 0.5m~3m(2ft~10ft)1m~3m(3ft~10ft)0.5m~2.5m(2ft~8ft)1m~2m(3ft~7ft)
Outer Diameter 0.5m~1.5m@AWG 30 2~3m@AWG 281m@AWG 30 1.5~3m@AWG 280.5m~1m@AWG 30 1.5m~3m@AWG 281m@AWG 30 1.5m~2m@AWG 28
Jacket Material PVCPVCPVCPVC
Minimum Bend Radius 23mm@AWG 30 25mm@AWG 2823mm@AWG 30 25mm@AWG 2823mm@AWG 30 25mm@AWG 2823mm@AWG 30 25mm@AWG 28
Power Consumption ≤0.1W≤0.1W≤0.1W≤0.1W
Case Operating Temperature 0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)
Protocol 400 Gigabit Ethernet 400G RoCE2x 200G Breakout Ethernet 2x 200G RoCE400 Gigabit Ethernet 400G RoCE2x 200G Breakout Ethernet 2x 200G RoCE 2x 200G Breakout Infiniband HDR
Application Swicth to Switch Switch to NIC Other LinksSwicth to Switch Switch to NIC Other LinksSwicth to Switch Switch to NIC Other LinksSwicth to Switch Switch to NIC Other Links
Connector Type
Data Rate
Media
Cable Type
Cable Length
Outer Diameter
Jacket Material
Minimum Bend Radius
Power Consumption
Case Operating Temperature
Protocol
Application
Cisco Compatible 400G QSFP-DD Passive DAC, 1m(3ft)
QDD-QDD-C1
Cisco Compatible 400G QSFP-DD to 2x 200G QSFP56 Passive Breakout DAC, 1m(3ft)
Q400-2Q200-C1
Cisco Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive DAC, 1m(3ft)
O400-QDD-C1
Cisco Compatible 400G OSFP Finned Top to 2 x 200G QSFP56 Breakout DAC, 1m(3ft)
O400-2Q200-C1
QSFP-DD to QSFP-DD
QSFP-DD to 2x QSFP56
OSFP(Flat Top) to QSFP-DD
OSFP(Finned Top) to 2x QSFP56
425Gbps to 425Gbps
425Gbps to 2x 212.5Gbps
425Gbps to 425Gbps
425Gbps to 2x 212.5Gbps
Copper
Copper
Copper
Copper
DAC
DAC
DAC
DAC
0.5m~3m(2ft~10ft)
1m~3m(3ft~10ft)
0.5m~2.5m(2ft~8ft)
1m~2m(3ft~7ft)
0.5m~1.5m@AWG 30 2~3m@AWG 28
1m@AWG 30 1.5~3m@AWG 28
0.5m~1m@AWG 30 1.5m~3m@AWG 28
1m@AWG 30 1.5m~2m@AWG 28
PVC
PVC
PVC
PVC
23mm@AWG 30 25mm@AWG 28
23mm@AWG 30 25mm@AWG 28
23mm@AWG 30 25mm@AWG 28
23mm@AWG 30 25mm@AWG 28
≤0.1W
≤0.1W
≤0.1W
≤0.1W
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
400 Gigabit Ethernet 400G RoCE
2x 200G Breakout Ethernet 2x 200G RoCE
400 Gigabit Ethernet 400G RoCE
2x 200G Breakout Ethernet 2x 200G RoCE 2x 200G Breakout Infiniband HDR
Swicth to Switch Switch to NIC Other Links
Swicth to Switch Switch to NIC Other Links
Swicth to Switch Switch to NIC Other Links
Swicth to Switch Switch to NIC Other Links
Questions & Answers
edit icon Ask a question
All (5) Application (1)Product (1)Compatibility (1)Installation (1)Performance (1)
Q:

What is the maximum distance supported?

by o***m on 2025-09-07 23:45:39

A:

Up to 10km depending on the model and fiber type.

by AICPLIGHT on 2025-09-08 20:55:55

like icon Helpful 0
comment icon Comment 0
Q:

Does the product support hot-swappable installation?

by D***m on 2025-05-21 03:20:03

A:

Yes, all our transceivers are designed to be hot-swappable.

by AICPLIGHT on 2025-05-22 01:48:08

like icon Helpful 0
comment icon Comment 0
Q:

How do I verify the module is working?

by R***m on 2025-04-09 17:40:53

A:

Use switch CLI or monitoring tools to check link status.

by AICPLIGHT on 2025-04-10 04:50:25

like icon Helpful 0
comment icon Comment 0
Q:

Do I need to configure anything before installation?

by O***m on 2025-01-29 11:48:21

A:

No major configuration is required; most modules are plug-and-play.

by AICPLIGHT on 2025-01-30 01:56:57

like icon Helpful 0
comment icon Comment 0
Q:

Is this product designed for enterprise LANs?

by Y***m on 2024-12-27 02:45:18

A:

Yes, lower speed modules are ideal for LAN and campus networks.

by AICPLIGHT on 2024-12-27 04:25:01

like icon Helpful 0
comment icon Comment 0
Customer Reviews
edit icon Write a review
All (5) Performance (1)Compatibility (1)Ease of Use (1)Customer Support (1)Value (1)
v
v***m
2025-07-01 01:10:48
Confirmed Purchase
5.0

Plug-and-play experience was excellent. The cables came clean and ready for immediate deployment.

link icon Helpful 0
comment icon Comment 0
P
P***m
2025-06-12 23:57:16
Confirmed Purchase
5.0

Fully compatible with our NVIDIA ConnectX-6 NICs and Mellanox switches. No firmware warnings or handshake delays.

link icon Helpful 0
comment icon Comment 0
f
f***m
2025-05-17 22:10:45
Confirmed Purchase
5.0

High-quality interconnects at a fraction of the price of branded cables. Ideal for scaling AI clusters on a budget.

link icon Helpful 0
comment icon Comment 0
x
x***m
2025-05-11 21:50:13
Confirmed Purchase
5.0

We had a shipping delay and the support team took ownership and resolved it quickly with a courier reroute.

link icon Helpful 0
comment icon Comment 0
7
7***m
2025-04-01 11:11:46
Confirmed Purchase
5.0

Used in our GPU training pod (8x H100s) to connect each server node. Latency remained sub-microsecond, even with large tensor workloads.

link icon Helpful 0
comment icon Comment 0
contact us