100G to 4x25G Breakout DAC Cable QSFP28 to 4xSFP28

SVNK 100G QSFP28 to 4×25G SFP28 Passive Direct Attach Copper (DAC) Cable

The SVNK 100G QSFP28 to 4×25G SFP28 Passive Copper Cable (PCC)—also known as a Direct Attach Copper (DAC) or Twinax cable—is a high-performance, cost-effective interconnect solution designed to provide reliable connectivity between 100G Ethernet (100GbE) and 25G Ethernet (25GbE) systems. This breakout DAC cable enables a single 100G QSFP28 port to fan out into four independent 25G SFP28 ports, offering maximum flexibility and efficient port utilization in modern data center architectures.

Each cable assembly integrates four high-speed copper lanes, each supporting data rates of up to 25 Gb/s, delivering an aggregate bandwidth of 100 Gb/s. Built using precision twinax conductors and advanced high-frequency design techniques, SVNK passive DAC cables deliver excellent signal integrity, ultra-low latency, low insertion loss, and minimal crosstalk, ensuring stable and error-free performance in short-reach environments.

As a passive copper solution, the cable requires no additional power, providing a highly energy-efficient and cost-optimized alternative to active optical solutions for short-distance interconnections within racks and between adjacent racks.

The cable is fully compliant with SFF-8665 (QSFP28) and SFF-8402 (SFP28) mechanical and electrical standards, as well as IEEE 802.3bj 100GBASE-CR4 and IEEE 802.3by 25GBASE-CR, ensuring seamless interoperability with a wide range of networking equipment.

Key Features

• Hot-pluggable QSFP28 to 4×SFP28 passive DAC cable assemblies
• 4-channel full-duplex passive copper architecture
• SFF-8665 / SFF-8402 compliant QSFP28 / SFP28 connectors
• Compliant with QSFP28 MSA and IEEE 802.3 standards
• 4 × 25G NRZ electrical interface
• SFF-8636 compliant I²C management interface
• IEEE 802.3bj 100GBASE-CR4 compliant
• IEEE 802.3by 25GBASE-CR compliant
• Aggregate data rate up to 100 Gb/s (4 × 25 Gb/s)
• Excellent signal integrity, low insertion loss, and low crosstalk
• Low power dissipation (passive, no external power required)
• Operating case temperature range: 0°C to +70°C
• Single 3.3 V supply voltage
• RoHS compliant