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0.5m (2ft) Juniper Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
0.5m (2ft) Juniper Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
0.5m (2ft) Juniper Compatible 400G OSFP Flat Top to 400G QSFP-DD Passive Direct Attach Copper Twinax Cable
P/N: OSFP-QDD-CU
US$124.00
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
0.5m (2ft) Juniper 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
0.5m (2ft)
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 is the typical MTBF of these products?

by h***m on 2025-07-10 10:20:33

A:

The typical MTBF (Mean Time Between Failures) exceeds 1 million hours.

by Helpful on 2025-07-10 10:29:20

like icon Helpful 0
comment icon Comment 0
Q:

Are these transceivers used in cloud computing?

by U***m on 2025-07-10 10:03:22

A:

Yes, they are widely used in public and private cloud infrastructure.

by CPLIGHT on 2025-07-10 10:30:13

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comment icon Comment 0
Q:

How do I clean MTP connectors before use?

by N***m on 2025-07-10 09:51:08

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:

Is it compatible with breakout configurations?

by u***m on 2025-07-10 09:50:49

A:

Yes, we support various breakout and parallel transmission structures.

by Helpful on 2025-07-10 10:27:07

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Q:

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

by m***m on 2025-07-10 09:49:25

A:

Typical BER is under normal operation.

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

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Q:

Is polarity important during installation?

by z***m on 2025-07-10 09:29:01

A:

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

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

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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)
r
r***m
2025-06-22 18:23:42
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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comment icon Comment 0
S
S***m
2025-06-18 02:50:26
Confirmed Purchase
5.0

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

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comment icon Comment 0
e
e***m
2025-06-13 04:01:37
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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l
l***m
2025-05-10 13:16:10
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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e
e***m
2025-04-23 16:35:41
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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