40G QSFP+ DAC Cables

Cost-Effective Direct and Breakout Copper Interconnects

Overview

The 40G QSFP+ Direct Attach Copper (DAC) cable series provides a simple, affordable, and energy-efficient way to build high-speed connections in data centers and enterprise networks.

Constructed with twinax copper and integrated QSFP connectors, these plug-and-play assemblies eliminate the need for optical modules and fiber patch cords, reducing both cost and complexity.

With standard lengths available up to 7 m (23 ft), NS 40G DACs are designed for rack-to-rack switch links, server uplinks, and short-range aggregation. Offering extremely low latency and near-zero power consumption, they are an ideal choice for performance-driven yet budget-conscious deployments.

Broad Compatibility

All NS 40G DACs are validated for multi-vendor interoperability and are compatible with equipment from leading manufacturers including Cisco, Huawei, Juniper, Arista, Dell, Extreme, HPE Aruba, Fortinet, and more. This ensures seamless integration across diverse networking environments without vendor lock-in.

Product Range

• QSFP+ to QSFP+ DAC
  Provides direct 40G-to-40G connectivity between switches or servers, delivering consistent throughput and ultra-low latency.

• QSFP+ to 4×SFP+ DAC
  Splits one 40G port into four independent 10G SFP+ links, enabling flexible breakout configurations for access networks and server connections.

Key Benefits

• Stable 40G performance: Reliable high-speed transmission for core and access links.

• Flexible options: Choose between 1:1 direct or 1:4 breakout designs.

• Lower cost: More economical than active optical cables or optics-based solutions.

• Energy-efficient: Passive copper design consumes virtually no power.

• Cross-vendor support: Compatible with major switch and server platforms.

Buying Guide

• By type: Select QSFP+ to QSFP+ for direct switch-to-switch or server uplinks, or QSFP+ to 4×SFP+ for 40G-to-10G breakout use cases.

• By length:

  • 1–3 m for in-rack connections.

  • 5–7 m for rack-to-rack links.

• Applications: Perfect for data center spine-leaf fabrics, server uplinks, and enterprise aggregation.

• Consult experts: For bulk rollouts or compatibility checks, contact our team for tailored guidance.

Conclusion

The 40G QSFP+ DAC Collection delivers a balance of cost efficiency, performance, and versatility, with direct and breakout options to support diverse network designs. Backed by multi-vendor compatibility and efficient short-range performance, NS DACs are the smart choice for reliable 40G connectivity.

⚡ Deploy NS 40G DACs today for streamlined, high-speed copper interconnects that save cost and energy.