Cisco Compatible 1m(3ft) 400G QSFP-DD to 2x200G QSFP56 Passive Direct Attach Copper Breakout Cable
#315001
SKU: 400G-QDD-2Q-CU*
1 Reviews
Stock:
3000 in stock
Total Price:
$109
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Free shipping for orders over $99
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Available for delivery within 2 days
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3-year warranty
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30-day return and refund
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Lifetime technical support
Products Highlight
- Max Power Consumption <0.1W
- Compliant with Hot Pluggable QSFP-DD MSA and QSFP56 MSA Standard
- Supports 400G to 2×200G Ethernet interconnection
- Optics-free, Stable Short-range Connection Solution with Low Cost
- Low Insertion Loss and Ultra-low Crosstalk, with Outstanding Performance
- Compliant with RoHS Environmental Protection Standards (Lead-Free)
- After Rigorous Physical Verification Testing
- Specifications
- Features
- Applications
- Testing
- Resources
- FAQs
- Reviews
Specifications
Product Certification
Features
The 400G-QDD-2Q-CU is a high-performance passive breakout direct-attach copper cable designed to bridge 400G QSFP-DD ports with dual 200G QSFP56 interfaces, delivering a cost-effective and energy-efficient solution for short-distance data center interconnects. With a compact QSFP-DD form factor on one end and two QSFP56 connectors on the other, this cable supports aggregated 400G throughput (PAM4 modulation) while enabling seamless integration with existing 200G infrastructure.
Applications
400G Direct Connection

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Quality Testing Program
01. Product Hardware
02. Compatibility Testing
03. Quality Control
Resource
FAQs
Hi, my device is a HW CE98-D8DQ switch. Can the 400G-QDD-2Q-CU cable be split to connect two 200G servers?
Can the two split 200G ports operate at full speed simultaneously? Will there be any bandwidth loss?
Are there any special considerations for heat dissipation during installation? Could the cable obstruct device ventilation?
Compared to the 400G-FR4 optical module, in which scenarios is this split copper cable more suitable?
Customer Reviews
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High-quality cable, full compatible with my gear. Highly recommended!