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Home Fiber Optic Cables Cisco 40G QSFP to 4x10G SFP+ DAC Breakout Cable 1M

Cisco 40G QSFP to 4x10G SFP+ DAC Breakout Cable 1M

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The Cisco QSFP-4SFP10G-CU1M= is a 1-meter passive DAC breakout cable designed to split a single 40G QSFP+ port into four 10G SFP+ connections. Built for high-density data centers, it simplifies migration from 40GbE to 10GbE while reducing power usage and infrastructure complexity.

OVERVIEW

  • The Cisco QSFP-4SFP10G-CU1M= is a high-density passive breakout DAC cable designed to optimize 40GbE to 10GbE network architectures in modern data centers. It enables a single 40G QSFP+ uplink to be efficiently distributed across four 10G SFP+ connections, improving port utilization and reducing switching overhead.
  • It is widely deployed in enterprise data centers, cloud environments, and virtualization clusters where scalable east-west traffic and predictable latency are critical. The 1-meter passive copper design eliminates the need for additional power, improving energy efficiency and operational cost control.
  • Compared to standard direct attach cables, this breakout design increases port density flexibility, simplifies Top-of-Rack (ToR) architectures, and supports smoother infrastructure modernization from legacy 10G networks to 40G spine-leaf designs.

USE CASES

  • Top-of-Rack (ToR) switch to server connectivity
  • Data center 40G to 10G network breakout deployments
  • Cloud computing infrastructure interconnects
  • Virtualization clusters requiring high-speed east-west traffic
  • Enterprise rack-level switch aggregation
  • High-density server farm connectivity
  • Storage and compute network segmentation layers

KEY FEATURES

  • 40G QSFP+ to 4x10G SFP+ breakout architecture
  • Passive DAC design for zero additional power consumption
  • 1-meter optimized length for rack-level connectivity
  • Low-latency signal transmission for enterprise workloads
  • High-density port utilization for data center optimization
  • Plug-and-play deployment with minimal configuration
  • Supports efficient 40GbE infrastructure scaling
  • Reduces reliance on optical transceivers in short-range links
  • Improves rack-level cable management and airflow efficiency
  • Designed for cloud and virtualization traffic patterns
  • Enables cost-efficient network expansion strategies
  • Fully suited for Top-of-Rack switch architectures
  • TECHNICAL SPECIFICATIONS

    • Brand: Cisco
    • Model: QSFP-4SFP10G-CU1M=
    • Part Number: QSFP-4SFP10G-CU1M=
    • Product Type: 40G QSFP+ to 4x10G SFP+ Passive DAC Breakout Cable
    • Cable Length: 1 Meter
    • Connector Type A: QSFP+
    • Connector Type B: 4 x SFP+
    • Maximum Data Rate: 40Gbps (4 × 10Gbps)
    • Cable Type: Passive Direct Attach Copper (DAC)
    • Application Type: 40G to 10G Breakout Connectivity
    • Deployment Environment: Data Center / Enterprise Network Racks
    • Standards Compliance: IEEE 802.3ba, SFF-8436, SFF-8431
    • Interface Type: High-speed Ethernet interconnect
    • Use Case Category: Top-of-Rack / Server-to-Switch connectivity
    • Power Requirement: Passive (no external power required)

    WHY CHOOSE THIS PRODUCT?

    • Enterprises choose this breakout DAC cable when they need efficient 40G port expansion without increasing switch complexity or cost.
    • It provides a cost-effective alternative to optical transceivers and fiber cabling for short-reach intra-rack connectivity.
    • The passive copper design reduces power consumption, helping improve overall data center energy efficiency and thermal management.
    • It enables seamless migration from 10G to 40G architectures, supporting infrastructure modernization strategies.
    • Its breakout capability maximizes switch port utilization, reducing hardware sprawl in high-density environments.

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