learn more
40G QSFP+ to 4×SFP+ breakout DAC cable​
40g dac cables
40g qsfp+ dac copper cables
qspf+ 40g dac cables​
40G QSFP+ to 4×SFP+ breakout DAC cable​
40g dac cables
40g qsfp+ dac copper cables
qspf+ 40g dac cables​

40G DAC Cable | QSFP+ to QSFP+ / 4×SFP+ Direct Attach Copper

A 40G Direct Attach Copper (DAC) Cables are cost-effective, low-latency interconnect solutions designed for short-distance, high-speed connections in data centers, HPC clusters, and enterprise networks.These cables offer seamless QSFP+ to QSFP+ or QSFP+ to 4×SFP+ breakout configurations, ensuring maximum compatibility with leading switch and server brands，providing a cost-effective and power-efficient solution for distances typically up to 7 meters.

Get a quote
Learn More
Parameter
Part NumberProductData RateLengthTemp
GL40-DY130xxM40G QSFP+ to QSFP+ DAC40Gbps0.5~3m0~70 ℃
GL40-DY126xxM40G QSFP+ to QSFP+ DAC40Gbps3~7m0~70 ℃
GL40-DY430xxM40G QSFP+ to 4SFP+ DAC40G to 4*10G0.5~3m0~70 ℃
GL40-DY426xxM40G QSFP+ to 4SFP+ DAC40G to 4*10G3~7m0~70 ℃
  • 40G Ethernet
  • InfiniBand QDR
  • Networked storage systems
  • Hubs, Switches, Routers, Servers

  • Speeds & Compatibility: Supports IEEE 802.3ba 40GBASE-CR4 standard; compatible with QSFP+ ports.

  • Passive & Active Options: Passive for short reach (≤7 m).

  • Low Power Consumption: Less than 0.5 W for passive cables.

  • Plug-and-Play: No configuration required, hot-swappable.

  • Robust Design: High-quality twinax copper construction with excellent EMI performance.

Why Choose Fibrecross

  • Factory-Direct Supply: Manufactured in our ISO-certified facility.

  • Rigorous Testing: 100% tested for signal integrity and performance.

  • Fast Delivery: Global shipping with short lead times.

  • OEM/ODM Support: Custom lengths, labeling, and packaging available.

FAQ About 40G DAC Cable

What is a 40G DAC cable?
A 40G DAC cable (Direct Attach Cable) is a high-speed, passive Twinax cable with QSFP+ connectors, used for short-distance data center connections up to 10 meters at 40Gbps.
What are the benefits of using 40G QSFP+ DAC Cable?

They 40G SFP+ DAC cable for data center, low latency, cost-effectiveness compared to AOC cables, and easy plug-and-play setup for data centers.

How does a 40G DAC cable compare to a 40G AOC cables?
40G DAC cables are ideal for short ranges (up to 10m) and are cheaper with lower power use, while 40G AOC cables suits longer distances (up to 100m) but costs more.
Is the DAC cable 40G compatible with my switch?
Our 40G QSFP+ DAC cables work with brands like Cisco, Juniper, and Arista. Email us at info@fibrecross.com to confirm compatibility.
What lengths are available for 40G DAC cables?
We offer 40G DAC cables in lengths of 0.5m, 1m, 2m, 3m, 5m, 7m  to fit your data center needs.
What lengths are available for 40G Direct Attach Cable?

We offer 40G Direct Attach Cable in lengths of 0.5m, 1m, 2m, 3m, 5m, 7m  to fit your data center needs.

Related Products

Learn More

Contact Us

Upgrade your data center with reliable, high-performance 40G DAC Cables from Fibrecross.  Request a Quote or contact our sales team for more details.