Cisco

Cisco QDD-2Q200-CU3M | 400G QSFP56-DD→2x200G QSFP56 DAC | 8x50G PAM4 (CR8 to 2x CR4) | passive twinax | 3m | QSFP56-DD to 2x QSFP56, CMIS/MSA

SKU:QDD-2Q200-CU3M

Regular price POA
POA
POA
Sale Sold out
Taxes included. Shipping calculated at checkout.

Description

Passive copper twinax breakout cable for short-reach 400G to dual 200G interconnects. One QSFP56-DD 400G end breaks out to two QSFP56 200G ends (8x50G PAM4 to 2×4x50G), ideal for connecting a 400G switch port to two 200G switch/NIC ports. Requires breakout support on the 400G port. Cable length: 3m.

Features

- 3m passive twinax for flexible in-rack and adjacent-rack connectivity
- Efficient 400G to dual 200G breakout with minimal latency
- Standards-aligned CR passive signaling and CMIS for broad compatibility
- Ruggedized twinax construction for reliable data center operations
- No optics or external power components required

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

View full details
  • You may also like
  • Best sellers
  • Related Products

specs-tabs

Collapsible content

FAQs

Technical Specifications

FAQs

Q: Is 3m the maximum for passive breakout?
A: 3m is a common maximum for passive 400G to 2×200G DACs; check your platform’s supported lengths.

Q: How do I verify breakout is active?
A: Use your switch OS to check the 400G port status; it should present two logical 200G interfaces when breakout is enabled.

Q: Does this support CMIS diagnostics?
A: Yes, it supports CMIS for basic cable identification and monitoring as supported by the host.

Q: What if I need longer than 3m?
A: Consider an active optical cable (AOC) or separate optical transceivers with duplex fiber for longer distances.

Q: Is any special power required?
A: No. As a passive DAC, it draws minimal power from the host interface only.

Technical Specifications

- Cable type: Passive direct-attach copper (DAC), twinax
- Form factor: QSFP56-DD (400G) to 2× QSFP56 (200G)
- Aggregate data rate: 400Gbps; breakout: 2×200Gbps
- Lane configuration: 8×50G PAM4 to 2×(4×50G) PAM4
- Ethernet CR compliance: 400GBASE-CR8 to 200GBASE-CR4 (MSA)
- Length: 3 meters
- Reach: Up to 3m (passive copper)
- Connector: QSFP56-DD male to 2× QSFP56 male
- Management: CMIS/MSA compliant
- Breakout requirement: 400G port must support 2×200G breakout

Recently Viewed

  • Request for a Quote

    Looking for competitive pricing? Submit a request, and our team will provide a tailored quote that fits your needs.

  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Call us Now  
  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Contact us