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2m (7ft) Generic Compatible 400G QSFP-DD to 8 x 50G SFP56 Passive Direct Attach Copper Breakout Cable


≤0.5W 39.5mm Twinax PAM4

FS P/N: QDD-400G-8SPC02
FS P/N: QDD-400G-8SPC02
25 Solds
3 Reviews
8 Questions
Pre-order, Ship by 29 Aug, 2024
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Deliver to New York, 10010
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5-Year Warranty
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Generic Compatible 400G QSFP-DD to 8x 50G SFP56 DAC Breakout Cable (2-meter, Passive, QSFP-DD to 8x SFP56, 28AWG)

The 400G QSFP-DD to 8x50G SFP56 DAC Breakout 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 8x SFP56 cable assemblies are high performance, high bandwidth and cost effective interconnect solutions that support 400G standard applications with different data rates. FS currently offers 400G QSFP-DD to 8x 50G SFP56 DAC in lengths of 0.5, 1, 1.5, 2, 2.5, and 3 meters, ideal for SDN, ML, and Cloud Computing.

Note: The FS P/N is changed from Q-8S56PC025 to QDD-400G-8SPC025, but the product is the same. Only the FS P/N has been changed.

Part Number
Vendor Name
Connector Type
QSFP-DD to 8x SFP56
Max Data Rate
Minimum Bend Radius
Wire AWG
Cable Length
2m (7ft)
Jacket Material
Commercial Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
Passive Twinax
Power Consumption
Power Supply
400G Ethernet
SFF-8679, QSFP-DD MSA, IEEE802.3bj, IEEE802.3cd
5 Years

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Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
Connectivity Solutions
Low Power Consumption for Energy-saving
Direct attach copper is suitable for very short links and offers a cost-effective way to establish a 400G to 8x50G within racks and across adjacent racks.
Lower Power Consumption
Copper Cable
to Save OPEX
39.5mm Minimum
Bend Radius for Easy Cabling
Tested in Host Devices for Proven Interoperability
Every unit is quality tested for compatibility in the targeted switch environment, which guarantees flawless operations.
Questions & Answers
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June 15, 2020
We were struggling to find some 400G DACs that would work with our Arista switches, but these DACs worked like a charm! Just plugged them into our switches and they worked immediately without any issues until now. Worthy to buy.
Verified Purchase
Helpful 13
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United States

January 06, 2020
Bought two QSFP-DD to 8 SFP56 twinax cable to connect our newly purchased 400G switches. Compared with other vendors I inquired, this cable was priced very competitively and worked exactly as intended.
Verified Purchase
Helpful 36
Comment 0



December 17, 2019
I knew that FS began to supply 400G products from the social platform by accident, and recently our new project needed to deploy 400G connections, so I ordered two pcs cable from them. If no issues happened to these two, we will order the other several ones again.
Verified Purchase
Helpful 14
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