40G DAC Cable QSFP+ to QSFP+ Passive Twinax Cable

SVNK 40G QSFP+ Direct Attach Copper (DAC) Cable

The SVNK 40G QSFP+ DAC cable is a high-performance, cost-effective copper interconnect solution designed to provide reliable 40Gb/s connectivity between network devices equipped with QSFP+ ports. Optimized for short-reach applications, this passive direct-attach copper cable is ideal for in-rack and adjacent-rack connections in modern data centers, high-performance computing (HPC) clusters, and enterprise networking environments.

Compliant with QSFP+ MSA (SFF-8436) and IEEE 802.3ba 40GBASE-CR4, the SVNK 40G QSFP+ DAC supports four parallel 10Gb/s NRZ electrical lanes, delivering an aggregate bandwidth of 40Gb/s. As a passive copper solution, it requires no additional power for signal conversion, enabling ultra-low power operation, minimal latency, and outstanding signal integrity over short distances.

Compared to optical transceivers and active optical cables, SVNK DAC cables offer a lower-cost, lower-power, and plug-and-play alternative, simplifying deployment while reducing overall infrastructure and maintenance costs.

Key Features

• Hot-pluggable QSFP+ DAC cable assembly
• 4-channel full-duplex passive copper design
• Supports 40Gb/s aggregate data rate (4 × 10Gb/s NRZ)
• SFF-8436 compliant QSFP+ connectors
• Compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-CR4
• Ultra-low power consumption (~0.02 W typical)
• Excellent signal integrity, low insertion loss, and low crosstalk
• Optimized for short-reach in-rack and adjacent-rack links
• Operating case temperature: 0°C to +70°C
• Single 3.3 V power supply
• RoHS compliant (lead-free)