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2m (7ft) Generic Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
2m (7ft) Generic Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
2m (7ft) Generic Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
P/N: OSFP-QDD-CU
US$159.00
5
Reviews
10
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
（1000 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
Hot Pluggable OSFP MSA and QSFP-DD MSA Compliant
Minimum Bend Radius 34.5mm for Flexible Routing
4x 100G PAM4 400GAUI-4 Electrical Interface
Low Insertion Loss and Ultra-low Crosstalk for Improved Performance
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Specifications
Q&A
Reviews
Resources
2m (7ft) Generic Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
The 400G OSFP to 400G QSFP-DD DAC provides a 400G copper direct-attach solution with a Flat-top (OSFP-RHS) form factor, suitable for very short links and offer a cost-effective way to establish a 400-Gigabit link between 400G ports of switches/routers within racks and across adjacent racks. This DAC is designed with ultra-low loss materials, square rings, twisted pair cable 8 wires and shell extension construction for superior mechanical properties and bending performance. It is tested in actual switching systems to ensure optimal signal integrity and the best end-to-end performance, ideal for SDN, ML, and Cloud Computing.
Note: This 400G QSFP-DD end operates on 4x100G-PAM4 modulation, making it suitable for downspeeding on 800G QSFP-DD switches that support channel disabling (i.e., operating with only 4 lanes enabled). It is not compatible with 400G QSFP-DD switches that use 8x50G-PAM4 modulation.
Specifications
Part Number
OSFP-QDD-CU
Vendor Name
AICPLIGHT
Form Factor
OSFP (Flat Top) to QSFP-DD
Max Data Rate
400Gbps
Media
Copper
Cable Type
Passive Twinax
Cable Length
2m (7ft)
Wire AWG
30AWG
Minimum Bend Radius
34.5mm
Power Consumption
≤0.1W
Jacket Material
PVC (OFNR)
Temperature
0 to 70°C (32 to 158°F)
Modulation Technology
OSFP-4x100GPAM4; QDD-4x100GPAM4
Application
400G Ethernet
Protocols
IEEE 802.3cd, OSFP MSA, QSFP-DD MSA, CMIS Rev4.0, SFF-8417
Warranty
5 Years
Certification
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Questions & Answers
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All (10) Application (2)Product (2)Compatibility (2)Installation (2)Performance (2)
Q:

What cable types are supported?

by d***m on 2025-07-10 10:19:43

A:

Supported cables include OS2, OM3, OM4, and OM5.

by CPLIGHT on 2025-07-10 10:29:50

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comment icon Comment 0
Q:

How do I clean MTP connectors before use?

by Z***m on 2025-07-10 10:19:34

A:

Use an MTP/MPO one-click cleaner or lint-free wipes with alcohol.

by Helpful on 2025-07-10 10:30:38

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comment icon Comment 0
Q:

Do these cables support PAM4 modulation?

by y***m on 2025-07-10 10:02:08

A:

Yes, many modules and cables support PAM4 encoding.

by CPLIGHT on 2025-07-10 10:28:18

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Q:

Can these be used in harsh environments?

by D***m on 2025-07-10 09:58:58

A:

We offer industrial-grade models for rugged applications.

by CPLIGHT on 2025-07-10 10:27:29

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Q:

Is polarity important during installation?

by 3***m on 2025-07-10 09:48:32

A:

Yes, ensure Type A/B polarity matches across the link.

by CPLIGHT on 2025-07-10 10:27:48

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Q:

What’s the typical BER (Bit Error Rate)?

by W***m on 2025-07-10 09:41:20

A:

Typical BER is under normal operation.

by Helpful on 2025-07-10 10:31:02

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Customer Reviews
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All (5) Performance (1)Compatibility (1)Ease of Use (1)Customer Support (1)Value (1)
L
L***m
2025-06-25 14:43:17
Confirmed Purchase
5.0

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

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F
F***m
2025-05-23 14:50:34
Confirmed Purchase
5.0

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

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comment icon Comment 0
Q
Q***m
2025-05-05 03:49:39
Confirmed Purchase
5.0

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

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g
g***m
2025-04-18 21:07:18
Confirmed Purchase
5.0

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

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R
R***m
2025-04-18 06:05:04
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.

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