400G DAC Cable QSFP-DD to QSFP-DD Passive Twinax Cable

SVNK 400G QSFP-DD Passive Direct Attach Copper (DAC) Cable

The SVNK 400G QSFP-DD DAC cable is a high-performance, short-reach copper interconnect solution engineered to support 400 Gigabit Ethernet links in next-generation data center and high-performance computing environments. Designed as a cost-effective alternative to optical interconnects, this passive DAC enables ultra-high-bandwidth connectivity between QSFP-DD 400G ports on switches, routers, and servers within racks and across adjacent racks.

The cable assembly incorporates 16 high-speed differential copper pairs, supporting 8 × 53.125 Gb/s PAM4 channels, to deliver an aggregate throughput of up to 425 Gb/s. With no active electronics, the passive architecture ensures zero additional power consumption, ultra-low latency, minimal insertion loss, and excellent signal integrity, making it ideal for dense 400G deployments.

SVNK 400G QSFP-DD DAC cables are optimized for short-distance copper links up to 3 meters, enabling higher port density, simplified cabling, and reduced total cost of ownership (TCO) in modern data centers.

Fully compliant with QSFP-DD MSA, CMIS, and IEEE 802.3 standards, these cables provide seamless interoperability with leading 400G platforms.

Key Features

• Hot-pluggable QSFP-DD passive DAC cable assemblies
• Supports 400G Ethernet data rates up to 425 Gb/s
• 8 × 53.125 Gb/s PAM4 channels
• 16 high-speed differential copper pairs
• Copper link length up to 3 m
• Zero power consumption (passive design)
• Ultra-low latency
• Excellent signal integrity, low insertion loss, and low crosstalk
• Bit Error Rate (BER) better than 1E-15
• Operating case temperature: 0°C to 70°C
• Single 3.3 V supply voltage
• QSFP-DD MSA, CMIS, IEEE 802.3 compliant
• RoHS compliant (lead-free)
• Minimum bend radius: 33.5 mm