400G to 4x100G Breakout DAC Cable QSFP-DD to QSFP28

SVNK 400G QSFP-DD to 4×100G QSFP28 Passive Copper Breakout Cable (DAC / PCC)

The SVNK 400G QSFP-DD to 4×100G QSFP28 Passive Copper Cable (PCC)—also known as a Direct Attach Copper (DAC) or Twinax breakout cable—is a high-performance, cost-effective interconnect solution designed to provide reliable 400G to 4×100G Ethernet breakout connectivity in modern data center and high-performance computing environments.

This integrated passive copper assembly enables a single 400G QSFP-DD port to connect directly to four independent 100G QSFP28 ports, supporting flexible network architectures and efficient port utilization. The cable is built with eight high-speed differential copper pairs, supporting 8 × 53.125 Gb/s PAM4 electrical lanes (400GAUI-8) to deliver an aggregate throughput of up to 425 Gb/s.

Because it is a fully passive design with no active electronics, the SVNK PCC cable offers zero power consumption, ultra-low latency, minimal EMI emission, and excellent signal integrity over short-reach links. This makes it an ideal alternative to optical solutions for in-rack and adjacent-rack interconnects, helping operators significantly reduce power usage, system complexity, and total cost of ownership (TCO).

Fully compliant with QSFP-DD MSA, CMIS, and IEEE 802.3 standards, the cable ensures seamless interoperability across leading 400G and 100G switch and server platforms.

Key Features

• Hot-pluggable QSFP-DD to 4×QSFP28 breakout DAC
• Supports 400G to 4×100G Ethernet interoperability
• 8 × 53.125 Gb/s PAM4 electrical lanes (400GAUI-8)
• Aggregate bandwidth up to 425 Gb/s
• Passive copper design – zero power consumption
• Copper link length up to 3 m
• Excellent signal integrity, low insertion loss, and low crosstalk
• Ultra-low latency and reduced EMI emission
• Single 3.3 V power interface
• Operating case temperature: 0°C to 70°C
• Bit Error Rate (BER) < 1E-15
• Minimum bend radius: 33.5 mm
• Fully compliant with QSFP-DD MSA, CMIS, IEEE 802.3
• RoHS compliant (lead-free)